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#1
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GFCI Problem
Two years ago, I revamped a 20a circuit in my (USA) house. I
added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? -- Thanks, croy |
#2
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GFCI Problem
On 1/8/2012 2:14 PM, croy wrote:
Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. |
#3
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GFCI Problem
On Sun, 08 Jan 2012 14:34:29 -0500, RBM
wrote: On 1/8/2012 2:14 PM, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Correct--extended is a more descriptive term. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. All the outlets on this circuit are in the kitchen (3 double-duplex). The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. Good news. -- croy |
#4
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GFCI Problem
On 1/8/2012 2:59 PM, croy wrote:
On Sun, 08 Jan 2012 14:34:29 -0500, wrote: On 1/8/2012 2:14 PM, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Correct--extended is a more descriptive term. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. All the outlets on this circuit are in the kitchen (3 double-duplex). The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. Good news. Is it possible that there is an outdoor outlet connected to this circuit? If so, I would check it for moisture entry, which is a likely cause for the circuit to trip. If possible I would replace the breaker with a standard type, and install gfci receptacles at only the kitchen counter outlets, which is what Nec currently requires in a kitchen |
#5
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GFCI Problem
I have no idea what I'm doing. Take this as possible areas for research. You used a lot of terms that could be easily interpreted different ways. Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. Are you sure you have a GFCI breaker? IRRC new construction requires arc-fault breakers which are much more sensitive. I've seen a bunch of complaints about false trips. Do you have any OTHER GFCI breakers in the system? That's diagnostically relevant when looking for imbalance. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Any junction boxes in the attic or ceiling? ceiling fan boxes? vent fans? anything in the circuit... Still the breaker trips after some hours, whether the circuit gets loaded or not. That's a "loaded word". Did you UNPLUG EVERYTHING, including those pesky ceiling fans, vents, in-the-wall intercom, doorbell transformer etc?? Turned off equals unloaded only if the device ain't broke. Did you check every outlet to verify that hot and neutral have not been reversed. There may be issues with leakage current in some electronic devices if hot and neutral get reversed. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? probably not. But rats chewing on the cable might. Or shifting ground stressing a wire and causing an "almost short" to a wire brad to become an intermittent short. I had this happen with a phone wire. Other ideas? A GFCI works by detecting imbalance between the current in the hot and neutral wires. Anything that gets to ground elsewhere, like in the third-wire ground or through you to the faucet is an imbalance and trips the breaker. Faults in the neutral or ground system can cause imbalances. I'd call up the power company customer service. You have to get past the robot in the call center to the engineering department. Tell them your problem and ask if it could be a problem in the neutral going out to the power company. See what they say. Ask what it would cost you for them to come out and check. I'll bet it's free. |
#6
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GFCI Problem
On Jan 8, 2:14*pm, croy wrote:
Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. *I assumed that the breaker had gone bad, so I replaced it. *The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: *the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. *Could that be causing the problem? Other ideas? -- Thanks, croy The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Jimmie |
#7
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GFCI Problem
On 1/8/2012 12:12 PM, RBM wrote:
On 1/8/2012 2:59 PM, croy wrote: On Sun, 08 Jan 2012 14:34:29 -0500, wrote: On 1/8/2012 2:14 PM, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Correct--extended is a more descriptive term. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. All the outlets on this circuit are in the kitchen (3 double-duplex). The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. Good news. Is it possible that there is an outdoor outlet connected to this circuit? If so, I would check it for moisture entry, which is a likely cause for the circuit to trip. Good point. If possible I would replace the breaker with a standard type, and install gfci receptacles at only the kitchen counter outlets, which is what Nec currently requires in a kitchen That seems like overkill. Why not simply install a GFCI outlet in the first "upstream" location and feed the remaining "downstream" receptacles from the GFCI? |
#8
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GFCI Problem
On Jan 8, 2:30*pm, JIMMIE wrote:
On Jan 8, 2:14*pm, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. *I assumed that the breaker had gone bad, so I replaced it. *The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: *the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. *Could that be causing the problem? Other ideas? -- Thanks, croy The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Jimmie- Hide quoted text - - Show quoted text - It isn't leakage current on the ground wire. It is unbalance between the two leads leaving the GFCI toward the load, it doesn't matter what they are connected to, it is the unbalance between the current flow in the two leads coming out of the GFCI that trips it.. |
#9
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GFCI Problem
Dear JIMMIE,
https://secure.wikimedia.org/wikiped...current_device As I understand, a GFCI compares the hot and neutral currents. Christopher A. Young Learn more about Jesus www.lds.org .. "JIMMIE" wrote in message ... The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Jimmie |
#10
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GFCI Problem
I've seen extension cords with cracked and leaking insullation.
Christopher A. Young Learn more about Jesus www.lds.org .. "JIMMIE" wrote in message ... Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Jimmie |
#11
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GFCI Problem
On 1/8/2012 3:30 PM, RosemontCrest wrote:
On 1/8/2012 12:12 PM, RBM wrote: On 1/8/2012 2:59 PM, croy wrote: On Sun, 08 Jan 2012 14:34:29 -0500, wrote: On 1/8/2012 2:14 PM, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Correct--extended is a more descriptive term. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. All the outlets on this circuit are in the kitchen (3 double-duplex). The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. Good news. Is it possible that there is an outdoor outlet connected to this circuit? If so, I would check it for moisture entry, which is a likely cause for the circuit to trip. Good point. If possible I would replace the breaker with a standard type, and install gfci receptacles at only the kitchen counter outlets, which is what Nec currently requires in a kitchen That seems like overkill. Why not simply install a GFCI outlet in the first "upstream" location and feed the remaining "downstream" receptacles from the GFCI? It could be done that way, depending upon the path of the wiring. At about $8 an outlet, I prefer to use GF receptacles at each required location, so when there is a ground fault issue, there is no mystery as to where it occurred. |
#12
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GFCI Problem
On Jan 8, 4:45*pm, "hr(bob) "
wrote: On Jan 8, 2:30*pm, JIMMIE wrote: On Jan 8, 2:14*pm, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. *I assumed that the breaker had gone bad, so I replaced it. *The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: *the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. *Could that be causing the problem? Other ideas? -- Thanks, croy The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Jimmie- Hide quoted text - - Show quoted text - It isn't leakage current on the ground wire. *It is unbalance between the two leads leaving the GFCI toward the load, it doesn't matter what they are connected to, it is the unbalance between the current flow in the two leads coming out of the GFCI that trips it..- Hide quoted text - - Show quoted text - True, thats an easy way to measure leakage current on the ground wire. If there is an imbalace betewwen the two leads the difference is on the ground. But damn thats a lot to type and has been explained here about a thousand times. Kind of like you cant really meaasure resistance but you can measure the voltage drop across something if you apply a constant current or measure the current if you apply aa constant voltage but damn it all its still called an ohm meter. Jimmie Jimmie |
#13
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GFCI Problem
croy wrote in
: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. There are no motors on it right? I hear they can raise heck with GFCIs'. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? |
#14
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GFCI Problem
On Sun, 08 Jan 2012 15:12:15 -0500, RBM
wrote: On 1/8/2012 2:59 PM, croy wrote: On Sun, 08 Jan 2012 14:34:29 -0500, wrote: On 1/8/2012 2:14 PM, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Correct--extended is a more descriptive term. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. All the outlets on this circuit are in the kitchen (3 double-duplex). The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. Good news. Is it possible that there is an outdoor outlet connected to this circuit? Nope. If so, I would check it for moisture entry, which is a likely cause for the circuit to trip. If possible I would replace the breaker with a standard type, and install gfci receptacles at only the kitchen counter outlets, which is what Nec currently requires in a kitchen All three outlet locations are just above the kitchen counter. -- croy |
#15
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GFCI Problem
On Sun, 08 Jan 2012 12:30:31 -0800, RosemontCrest
wrote: On 1/8/2012 12:12 PM, RBM wrote: On 1/8/2012 2:59 PM, croy wrote: On Sun, 08 Jan 2012 14:34:29 -0500, wrote: On 1/8/2012 2:14 PM, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Correct--extended is a more descriptive term. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. All the outlets on this circuit are in the kitchen (3 double-duplex). The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. Good news. Is it possible that there is an outdoor outlet connected to this circuit? If so, I would check it for moisture entry, which is a likely cause for the circuit to trip. Good point. If possible I would replace the breaker with a standard type, and install gfci receptacles at only the kitchen counter outlets, which is what Nec currently requires in a kitchen That seems like overkill. Why not simply install a GFCI outlet in the first "upstream" location and feed the remaining "downstream" receptacles from the GFCI? Doesn't an outlet-style GFCI cover the whole circuit? -- croy |
#16
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GFCI Problem
On Sun, 08 Jan 2012 17:00:08 -0500, RBM
wrote: On 1/8/2012 3:30 PM, RosemontCrest wrote: On 1/8/2012 12:12 PM, RBM wrote: On 1/8/2012 2:59 PM, croy wrote: On Sun, 08 Jan 2012 14:34:29 -0500, wrote: On 1/8/2012 2:14 PM, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Correct--extended is a more descriptive term. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. All the outlets on this circuit are in the kitchen (3 double-duplex). The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. Good news. Is it possible that there is an outdoor outlet connected to this circuit? If so, I would check it for moisture entry, which is a likely cause for the circuit to trip. Good point. If possible I would replace the breaker with a standard type, and install gfci receptacles at only the kitchen counter outlets, which is what Nec currently requires in a kitchen That seems like overkill. Why not simply install a GFCI outlet in the first "upstream" location and feed the remaining "downstream" receptacles from the GFCI? It could be done that way, depending upon the path of the wiring. At about $8 an outlet, I prefer to use GF receptacles at each required location, so when there is a ground fault issue, there is no mystery as to where it occurred. Hmmm. I thought a GFCI outlet covered the whole circuit for ground faults--no? -- croy |
#17
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GFCI Problem
On 1/8/2012 6:07 PM, croy wrote:
On Sun, 08 Jan 2012 15:12:15 -0500, wrote: On 1/8/2012 2:59 PM, croy wrote: On Sun, 08 Jan 2012 14:34:29 -0500, wrote: On 1/8/2012 2:14 PM, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Correct--extended is a more descriptive term. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. All the outlets on this circuit are in the kitchen (3 double-duplex). The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. Good news. Is it possible that there is an outdoor outlet connected to this circuit? Nope. If so, I would check it for moisture entry, which is a likely cause for the circuit to trip. If possible I would replace the breaker with a standard type, and install gfci receptacles at only the kitchen counter outlets, which is what Nec currently requires in a kitchen All three outlet locations are just above the kitchen counter. You extended an existing 20 amp circuit. Are you saying that the only things on the entire circuit are 3 kitchen counter outlets? |
#18
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GFCI Problem
On Sun, 08 Jan 2012 12:21:45 -0800, mike
wrote: I have no idea what I'm doing. Take this as possible areas for research. You used a lot of terms that could be easily interpreted different ways. Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. Are you sure you have a GFCI breaker? IRRC new construction requires arc-fault breakers which are much more sensitive. I've seen a bunch of complaints about false trips. This is a GF breaker (GE brand, THQL1120GFP). Do you have any OTHER GFCI breakers in the system? Nope. I should, but I don't. Um, now that I think about it, there is a sub-panel in the garage that has three GFCI breakers in it. How would that effect this one, and what would I do about it? That's diagnostically relevant when looking for imbalance. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Any junction boxes in the attic or ceiling? ceiling fan boxes? vent fans? anything in the circuit... Still the breaker trips after some hours, whether the circuit gets loaded or not. That's a "loaded word". Did you UNPLUG EVERYTHING, including those pesky ceiling fans, vents, in-the-wall intercom, doorbell transformer etc?? Turned off equals unloaded only if the device ain't broke. Nothing plugged in at all. Did you check every outlet to verify that hot and neutral have not been reversed. There may be issues with leakage current in some electronic devices if hot and neutral get reversed. Hmmm. No, I didn't think to check that, but... why would it work ok for a year and a half? One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? probably not. But rats chewing on the cable might. Rats! ;-) Looks like some time in the attic is in order. Or shifting ground stressing a wire and causing an "almost short" to a wire brad to become an intermittent short. I had this happen with a phone wire. Another vote for the attic. Other ideas? A GFCI works by detecting imbalance between the current in the hot and neutral wires. Anything that gets to ground elsewhere, like in the third-wire ground or through you to the faucet is an imbalance and trips the breaker. Faults in the neutral or ground system can cause imbalances. I'd call up the power company customer service. You have to get past the robot in the call center to the engineering department. Tell them your problem and ask if it could be a problem in the neutral going out to the power company. See what they say. Ask what it would cost you for them to come out and check. I'll bet it's free. Thanks, I'll keep that idea handy. -- croy |
#19
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GFCI Problem
On 1/8/2012 6:10 PM, croy wrote:
On Sun, 08 Jan 2012 17:00:08 -0500, wrote: On 1/8/2012 3:30 PM, RosemontCrest wrote: On 1/8/2012 12:12 PM, RBM wrote: On 1/8/2012 2:59 PM, croy wrote: On Sun, 08 Jan 2012 14:34:29 -0500, wrote: On 1/8/2012 2:14 PM, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Correct--extended is a more descriptive term. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. All the outlets on this circuit are in the kitchen (3 double-duplex). The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. Good news. Is it possible that there is an outdoor outlet connected to this circuit? If so, I would check it for moisture entry, which is a likely cause for the circuit to trip. Good point. If possible I would replace the breaker with a standard type, and install gfci receptacles at only the kitchen counter outlets, which is what Nec currently requires in a kitchen That seems like overkill. Why not simply install a GFCI outlet in the first "upstream" location and feed the remaining "downstream" receptacles from the GFCI? It could be done that way, depending upon the path of the wiring. At about $8 an outlet, I prefer to use GF receptacles at each required location, so when there is a ground fault issue, there is no mystery as to where it occurred. Hmmm. I thought a GFCI outlet covered the whole circuit for ground faults--no? If the outlets are daisy-chained, you can install a GFCI receptacle at the first location in the chain and connect the wires going to the downstream receptacles to the "load" terminals of the ground fault. If it's done this way you, can use standard receptacles in the downstream locations |
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GFCI Problem
On Sun, 08 Jan 2012 18:21:53 -0500, RBM
wrote: On 1/8/2012 6:07 PM, croy wrote: On Sun, 08 Jan 2012 15:12:15 -0500, wrote: On 1/8/2012 2:59 PM, croy wrote: On Sun, 08 Jan 2012 14:34:29 -0500, wrote: On 1/8/2012 2:14 PM, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Correct--extended is a more descriptive term. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. All the outlets on this circuit are in the kitchen (3 double-duplex). The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. Good news. Is it possible that there is an outdoor outlet connected to this circuit? Nope. If so, I would check it for moisture entry, which is a likely cause for the circuit to trip. If possible I would replace the breaker with a standard type, and install gfci receptacles at only the kitchen counter outlets, which is what Nec currently requires in a kitchen All three outlet locations are just above the kitchen counter. You extended an existing 20 amp circuit. Are you saying that the only things on the entire circuit are 3 kitchen counter outlets? Yup. There were two before, one for the fridge and stove, and one for countertop use. Now the fridge and stove are on their own brand new circuit, and the old circuit is powering three double-duplex above-counter outlets. -- croy |
#21
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GFCI Problem
On Sun, 8 Jan 2012 12:30:09 -0800 (PST), JIMMIE
wrote: On Jan 8, 2:14*pm, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. *I assumed that the breaker had gone bad, so I replaced it. *The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: *the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. *Could that be causing the problem? Other ideas? -- Thanks, croy The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Interesting, for sure. If I count all the ups and downs and horizontals, there's about 60 to 65' in the run to the furthest outlets. Hmmm. -- croy |
#22
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GFCI Problem
On Sun, 08 Jan 2012 22:51:28 GMT, Red Green
wrote: croy wrote in : Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. There are no motors on it right? I hear they can raise heck with GFCIs'. Nope. Nothing plugged in, nothing built-in connected. -- croy |
#23
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GFCI Problem
There are no motors on it right? I hear they can raise heck with GFCIs'. Nope. Nothing plugged in, nothing built-in connected. -- croy If there is nothing plugged into any of the outlets and now they trip and before they didn't, I would check: 1) insects or moisture in one of the boxes or cables? 2) is there a high power radio transmitter nearby, ham operator etc? 3) Does it trip at the same time that the fridge compressor or furnace or other large load kicks on/off? Any change to one of the nearby circuits, new TV or ???? And please verify you are talking about GFI breakers and not arc fault detecting breakers or some other unusual thing.. Do come back and let us know when you find out the answer... Mark |
#24
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GFCI Problem
croy wrote:
That seems like overkill. Why not simply install a GFCI outlet in the first "upstream" location and feed the remaining "downstream" receptacles from the GFCI? Doesn't an outlet-style GFCI cover the whole circuit? Yes, but when the GFCI outlet pops, you don't know immediately who is the culprit. Not that that matters much... |
#25
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GFCI Problem
croy wrote:
Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? If you've got all the outlets on the circuit identified, try removing them from the equation one by one. After you have them ALL disconnected, and the GFCI still trips, it's off to the attic! |
#26
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GFCI Problem
On 1/8/2012 3:08 PM, croy wrote:
On Sun, 08 Jan 2012 12:30:31 -0800, RosemontCrest wrote: On 1/8/2012 12:12 PM, RBM wrote: On 1/8/2012 2:59 PM, croy wrote: On Sun, 08 Jan 2012 14:34:29 -0500, wrote: On 1/8/2012 2:14 PM, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? I don't know what it means to "revamp" a circuit. It sounds like you extended an existing circuit, but that's irrelevant. Correct--extended is a more descriptive term. Unless required by Nec, replace the GFCI breaker with a standard breaker. If any of the outlets in the circuit require ground fault protection, install receptacles at those locations. All the outlets on this circuit are in the kitchen (3 double-duplex). The undersized equipment ground on older Romex won't have any affect of the function of any GFCI device. Good news. Is it possible that there is an outdoor outlet connected to this circuit? If so, I would check it for moisture entry, which is a likely cause for the circuit to trip. Good point. If possible I would replace the breaker with a standard type, and install gfci receptacles at only the kitchen counter outlets, which is what Nec currently requires in a kitchen That seems like overkill. Why not simply install a GFCI outlet in the first "upstream" location and feed the remaining "downstream" receptacles from the GFCI? Doesn't an outlet-style GFCI cover the whole circuit? Only if it is wired properly. As RBM stated, if the GFCI outlet is installed in the first "upstream" location of the circuit and the "downstream" outlets are connected to the "load" terminals of the GFCI outlet, all outlets on that circuit will be protected. |
#27
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GFCI Problem (wire from the sixties? Really?)
If you have Romex from the sixties, that may be the entire problem. Old
wire, old insullation. Does the entire circuit need GFCI protection, or just one socket? You may be better off either buying and running some new Romex, or put GFCI outlet where it is totally needed. Christopher A. Young Learn more about Jesus www.lds.org .. "croy" wrote in message ... Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. I assumed that the breaker had gone bad, so I replaced it. The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. Could that be causing the problem? Other ideas? -- Thanks, croy |
#28
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GFCI Problem
Outlet protects itself, and anything "down stream" from the outlet. Anything
from the box to the GFCI outlet isn't protected. Christopher A. Young Learn more about Jesus www.lds.org .. "croy" wrote in message ... That seems like overkill. Why not simply install a GFCI outlet in the first "upstream" location and feed the remaining "downstream" receptacles from the GFCI? Doesn't an outlet-style GFCI cover the whole circuit? -- croy |
#29
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GFCI Problem
No. Only the GFCI and any outlets down stream from the GFCI.
Christopher A. Young Learn more about Jesus www.lds.org .. "croy" wrote in message news Hmmm. I thought a GFCI outlet covered the whole circuit for ground faults--no? -- croy |
#30
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GFCI Problem
If possible. take out the romex from the sixties, and put in new romex. The
old stuff might have cracking insullation. Christopher A. Young Learn more about Jesus www.lds.org .. "croy" wrote in message ... All the outlets on this circuit are in the kitchen (3 double-duplex). |
#31
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GFCI Problem
Check for reversed with:
http://www.harborfreight.com/electri...sis-32907.html You may have a new problem with the old Romex. And, what are the odds? Someone else is suggesting you check for bad Romex? Christopher A. Young Learn more about Jesus www.lds.org .. "croy" wrote in message ... Did you check every outlet to verify that hot and neutral have not been reversed. There may be issues with leakage current in some electronic devices if hot and neutral get reversed. Hmmm. No, I didn't think to check that, but... why would it work ok for a year and a half? But rats chewing on the cable might. Rats! ;-) Looks like some time in the attic is in order. Or shifting ground stressing a wire and causing an "almost short" to a wire brad to become an intermittent short. I had this happen with a phone wire. Another vote for the attic. |
#32
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GFCI Problem
On Jan 8, 5:24*pm, JIMMIE wrote:
On Jan 8, 4:45*pm, "hr(bob) " wrote: On Jan 8, 2:30*pm, JIMMIE wrote: On Jan 8, 2:14*pm, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. *I assumed that the breaker had gone bad, so I replaced it. *The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: *the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. *Could that be causing the problem? Other ideas? -- Thanks, croy The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Jimmie- Hide quoted text - - Show quoted text - It isn't leakage current on the ground wire. *It is unbalance between the two leads leaving the GFCI toward the load, it doesn't matter what they are connected to, it is the unbalance between the current flow in the two leads coming out of the GFCI that trips it..- Hide quoted text - - Show quoted text - True, thats an easy way to measure leakage current on the ground wire. If there is an imbalace betewwen the two leads the difference is on the ground. But damn thats a lot to type and has been explained here about a thousand times. Kind of like you cant really meaasure resistance but you can measure the voltage drop across something if you apply a constant current or measure the current if you apply aa constant voltage but damn it all its still called an ohm meter. Jimmie Jimmie "If there is an imbalace betewwen the two leads the difference is on the ground." Huh? What if the difference is in the user? Current comes in on the hot, some of it leaks into the user and therefore there is less on the neutral. The GFCI will trip and no current has leaked onto the ground wire - assuming there even *is* a ground wire. GFCI's can be used, per code, to allow the installation of 3 prong outlets on ungrounded circuits because the GFCI doesn't care about leakage to ground, it only cares if there is an imbalance between the hot and neutral. While it is certainly possible that the leakage current could be on the ground, to state that "the GFCI breaker works by detecting leakage current on the ground wire" is just flat wrong. It works by detecting the imbalance between the hot and neutral, regardless of where it leaked to. |
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GFCI Problem
On Jan 8, 4:45*pm, "hr(bob) "
wrote: On Jan 8, 2:30*pm, JIMMIE wrote: On Jan 8, 2:14*pm, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. *I assumed that the breaker had gone bad, so I replaced it. *The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: *the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. *Could that be causing the problem? Other ideas? -- Thanks, croy The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Jimmie- Hide quoted text - - Show quoted text - It isn't leakage current on the ground wire. *It is unbalance between the two leads leaving the GFCI toward the load, it doesn't matter what they are connected to, it is the unbalance between the current flow in the two leads coming out of the GFCI that trips it..- Hide quoted text - - Show quoted text - If there is an imbalance that means current IS flowing in the ground circuit. Sticking yor finger in a socket and grabbing the water faucet will trip the associated GFCI because the current flowed back to ground creating a current imbalance in the hot and nuetral legs. It may or may not have went back via any particular ground wire or other path.. My mentioning wire was an assumption that had to do with the OPs problem and my earlier suggestion that the wire may be excessively long. In that case ground wire is appropriate. Just one possible solutuion out of many suggest because no one else did. It is equally correct to expalin the basic operation of a GFCI as detecting ground current as it is detecting and imbalance in current in the hot and return. Jimmie |
#34
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GFCI Problem
On Jan 8, 10:24*pm, JIMMIE wrote:
On Jan 8, 4:45*pm, "hr(bob) " wrote: On Jan 8, 2:30*pm, JIMMIE wrote: On Jan 8, 2:14*pm, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. *I assumed that the breaker had gone bad, so I replaced it. *The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: *the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. *Could that be causing the problem? Other ideas? -- Thanks, croy The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Jimmie- Hide quoted text - - Show quoted text - It isn't leakage current on the ground wire. *It is unbalance between the two leads leaving the GFCI toward the load, it doesn't matter what they are connected to, it is the unbalance between the current flow in the two leads coming out of the GFCI that trips it..- Hide quoted text - - Show quoted text - * *If there is an imbalance that means current IS flowing in the ground circuit. Sticking yor finger in a socket and grabbing the water faucet will trip the associated GFCI because the current flowed back to ground creating a current imbalance in the hot and nuetral legs. It may or may not have went back via any particular ground wire or other path.. My mentioning *wire was an assumption that had to do with the OPs problem and my earlier suggestion that the wire may be excessively long. In that case ground wire is appropriate. Just one possible solutuion out of many suggest because no one else did. It is equally correct to expalin the basic operation of a GFCI as detecting ground current as it is detecting *and imbalance in current in the hot and return. Jimmie- Hide quoted text - - Show quoted text - "If there is an imbalance that means current IS flowing in the ground circuit." That may be true, but that is not what casues a GFCI to trip. Your original statement was "The GFCI breaker works by detecting leakage current on the ground wire" and that is the only point I am arguing. Your statement implies that the device is monitoring the current on the ground wire (how else would it detect the current?) and when it detects the leakage current it trips. You may call it semantics, but I call it science. The fact remains that your statement "The GFCI breaker works by detecting leakage current on the ground wire" is just plain wrong, regardless of how you try to justify it. I'll even give you some latitude and let you leave off the word "wire". The fact remains that the GFCI doesn't detect to leakage current on any type of ground circuit. Period. It works by detecting the imbalance between the hot and neutral wires. Regardless of where the leakage current is going to, that leakage current itself is not "detected" by the GFCI. It is the *imbalance* between the hot and neutral that is detected. Compare it to pressure-balancing in a shower valve. The valve itself will sense the difference in pressure (substitute: current) between the hot and the cold (substitute: neutral) and adjust itself to maintain the original balance (substitute: trip). It doesn't "detect" the cold water flowing through the pipe (substitute: ground wire) to a toilet or a washer or a sink. All it knows is that there is an imbalance right at it's point of monitoring and it compensates for it. That's how a GFCI works. Look it up. |
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GFCI Problem
On Jan 9, 11:18*am, DerbyDad03 wrote:
On Jan 8, 10:24*pm, JIMMIE wrote: On Jan 8, 4:45*pm, "hr(bob) " wrote: On Jan 8, 2:30*pm, JIMMIE wrote: On Jan 8, 2:14*pm, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. *I assumed that the breaker had gone bad, so I replaced it. *The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: *the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. *Could that be causing the problem? Other ideas? -- Thanks, croy The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Jimmie- Hide quoted text - - Show quoted text - It isn't leakage current on the ground wire. *It is unbalance between the two leads leaving the GFCI toward the load, it doesn't matter what they are connected to, it is the unbalance between the current flow in the two leads coming out of the GFCI that trips it..- Hide quoted text - - Show quoted text - * *If there is an imbalance that means current IS flowing in the ground circuit. Sticking yor finger in a socket and grabbing the water faucet will trip the associated GFCI because the current flowed back to ground creating a current imbalance in the hot and nuetral legs. It may or may not have went back via any particular ground wire or other path.. My mentioning *wire was an assumption that had to do with the OPs problem and my earlier suggestion that the wire may be excessively long. In that case ground wire is appropriate. Just one possible solutuion out of many suggest because no one else did. It is equally correct to expalin the basic operation of a GFCI as detecting ground current as it is detecting *and imbalance in current in the hot and return. Jimmie- Hide quoted text - - Show quoted text - "If there is an imbalance that means current IS flowing in the ground circuit." That may be true, but that is not what casues a GFCI to trip. Your original statement was "The GFCI breaker works by detecting leakage current on the ground wire" and that is the only point I am arguing. Your statement implies that the device is monitoring the current on the ground wire (how else would it detect the current?) and when it detects the leakage current it trips. You may call it semantics, but I call it science. The fact remains that your statement "The GFCI breaker works by detecting leakage current on the ground wire" is just plain wrong, regardless of how you try to justify it. I'll even give you some latitude and let you leave off the word "wire". The fact remains that the GFCI doesn't detect to leakage current on any type of ground circuit. Period. It works by detecting the imbalance between the hot and neutral wires. Regardless of where the leakage current is going to, that leakage current itself is not "detected" by the GFCI. It is the *imbalance* between the hot and neutral that is detected. Compare it to pressure-balancing in a shower valve. The valve itself will sense the difference in pressure (substitute: current) between the hot and the cold (substitute: neutral) and adjust itself to maintain the original balance (substitute: trip). It doesn't "detect" the cold water flowing through the pipe (substitute: ground wire) to a toilet or a washer or a sink. All it knows is that there is an imbalance right at it's point of monitoring and it compensates for it. That's how a GFCI works. Look it up.- Hide quoted text - - Show quoted text - That's exactly what I was trying to point out in my earlier response to Croy a few days ago. |
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GFCI Problem
On Jan 9, 2:51*pm, "hr(bob) "
wrote: On Jan 9, 11:18*am, DerbyDad03 wrote: On Jan 8, 10:24*pm, JIMMIE wrote: On Jan 8, 4:45*pm, "hr(bob) " wrote: On Jan 8, 2:30*pm, JIMMIE wrote: On Jan 8, 2:14*pm, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. *I assumed that the breaker had gone bad, so I replaced it. *The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: *the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. *Could that be causing the problem? Other ideas? -- Thanks, croy The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Jimmie- Hide quoted text - - Show quoted text - It isn't leakage current on the ground wire. *It is unbalance between the two leads leaving the GFCI toward the load, it doesn't matter what they are connected to, it is the unbalance between the current flow in the two leads coming out of the GFCI that trips it..- Hide quoted text - - Show quoted text - * *If there is an imbalance that means current IS flowing in the ground circuit. Sticking yor finger in a socket and grabbing the water faucet will trip the associated GFCI because the current flowed back to ground creating a current imbalance in the hot and nuetral legs. It may or may not have went back via any particular ground wire or other path.. My mentioning *wire was an assumption that had to do with the OPs problem and my earlier suggestion that the wire may be excessively long. In that case ground wire is appropriate. Just one possible solutuion out of many suggest because no one else did. It is equally correct to expalin the basic operation of a GFCI as detecting ground current as it is detecting *and imbalance in current in the hot and return. Jimmie- Hide quoted text - - Show quoted text - "If there is an imbalance that means current IS flowing in the ground circuit." That may be true, but that is not what casues a GFCI to trip. Your original statement was "The GFCI breaker works by detecting leakage current on the ground wire" and that is the only point I am arguing. Your statement implies that the device is monitoring the current on the ground wire (how else would it detect the current?) and when it detects the leakage current it trips. You may call it semantics, but I call it science. The fact remains that your statement "The GFCI breaker works by detecting leakage current on the ground wire" is just plain wrong, regardless of how you try to justify it. I'll even give you some latitude and let you leave off the word "wire". The fact remains that the GFCI doesn't detect to leakage current on any type of ground circuit. Period. It works by detecting the imbalance between the hot and neutral wires. Regardless of where the leakage current is going to, that leakage current itself is not "detected" by the GFCI. It is the *imbalance* between the hot and neutral that is detected. Compare it to pressure-balancing in a shower valve. The valve itself will sense the difference in pressure (substitute: current) between the hot and the cold (substitute: neutral) and adjust itself to maintain the original balance (substitute: trip). It doesn't "detect" the cold water flowing through the pipe (substitute: ground wire) to a toilet or a washer or a sink. All it knows is that there is an imbalance right at it's point of monitoring and it compensates for it. That's how a GFCI works. Look it up.- Hide quoted text - - Show quoted text - That's exactly what I was trying to point out in my earlier response to Croy a few days ago.- Hide quoted text - - Show quoted text - I don't know if Croy gets it or not, but our friend JIMMIE doesn't appear to, at least not yet. |
#37
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GFCI Problem
On Jan 9, 12:18*pm, DerbyDad03 wrote:
On Jan 8, 10:24*pm, JIMMIE wrote: On Jan 8, 4:45*pm, "hr(bob) " wrote: On Jan 8, 2:30*pm, JIMMIE wrote: On Jan 8, 2:14*pm, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. *I assumed that the breaker had gone bad, so I replaced it. *The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: *the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. *Could that be causing the problem? Other ideas? -- Thanks, croy The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Jimmie- Hide quoted text - - Show quoted text - It isn't leakage current on the ground wire. *It is unbalance between the two leads leaving the GFCI toward the load, it doesn't matter what they are connected to, it is the unbalance between the current flow in the two leads coming out of the GFCI that trips it..- Hide quoted text - - Show quoted text - * *If there is an imbalance that means current IS flowing in the ground circuit. Sticking yor finger in a socket and grabbing the water faucet will trip the associated GFCI because the current flowed back to ground creating a current imbalance in the hot and nuetral legs. It may or may not have went back via any particular ground wire or other path.. My mentioning *wire was an assumption that had to do with the OPs problem and my earlier suggestion that the wire may be excessively long. In that case ground wire is appropriate. Just one possible solutuion out of many suggest because no one else did. It is equally correct to expalin the basic operation of a GFCI as detecting ground current as it is detecting *and imbalance in current in the hot and return. That is not true. The second explanation is completely correct and all that is needed. Here's one to think about. I connect together two netural wires on a GFI circuit. What happens? It trips because there is an imbalance between the hot and neutral currents. There is no path to ground involved. Or I swap the neutrals on two differenct circuits. Again the GFI trips and no ground current is involved. "If there is an imbalance that means current IS flowing in the ground circuit." That may be true, but that is not what casues a GFCI to trip. Yes, that true, but per above, it's not the only way to trip one. Originally Jimmie used the term ground wire. Now he's using ground circuit. I would say that's an improvement, but still very misleading at best. I agree with you that few people would hear the term ground circuit and think that circuit includes them standing on a wet cement floor. The more natural association would be to the ground of the circuit involved. Your original statement was "The GFCI breaker works by detecting leakage current on the ground wire" and that is the only point I am arguing. Your statement implies that the device is monitoring the current on the ground wire (how else would it detect the current?) and when it detects the leakage current it trips. I agree. You may call it semantics, but I call it science. The fact remains that your statement "The GFCI breaker works by detecting leakage current on the ground wire" is just plain wrong, regardless of how you try to justify it. I'll even give you some latitude and let you leave off the word "wire". The fact remains that the GFCI doesn't detect to leakage current on any type of ground circuit. Period. It works by detecting the imbalance between the hot and neutral wires. Regardless of where the leakage current is going to, that leakage current itself is not "detected" by the GFCI. It is the *imbalance* between the hot and neutral that is detected. |
#38
Posted to alt.home.repair
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GFCI Problem
On Jan 10, 11:20*am, "
wrote: On Jan 9, 12:18*pm, DerbyDad03 wrote: On Jan 8, 10:24*pm, JIMMIE wrote: On Jan 8, 4:45*pm, "hr(bob) " wrote: On Jan 8, 2:30*pm, JIMMIE wrote: On Jan 8, 2:14*pm, croy wrote: Two years ago, I revamped a 20a circuit in my (USA) house. I added some outlets, and put a GFCI breaker for that circuit in the service panel. All was well for a year and a half, then the GFCI breaker started tripping for no apparent reason. *I assumed that the breaker had gone bad, so I replaced it. *The new one still trips, albeit after a longer period of time (old, about three minutes; new, three to 20 hours). I've pulled all the outlets and tightened the screws. Still the breaker trips after some hours, whether the circuit gets loaded or not. One thought I've had: *the original romex for the longest run of this circuit is from that period of time (1960s?) when the ground wire is smaller gage than the main conductors. *Could that be causing the problem? Other ideas? -- Thanks, croy The GFCI breaker works by detecting leakage current on the ground wire. It only needs to detect about 5ma to cause a trip. Witth no obvious problems they willl still trip just because the wire is too long. This is caused by capacitive coupling between the hot wire and the ground. I dis overed this the hard way when I ran an extension courd from my back porch to my storage shed about 60 ft away. Forgot and rediscoverd it again when I ran 100ft of extension cord at an RV park. Jimmie- Hide quoted text - - Show quoted text - It isn't leakage current on the ground wire. *It is unbalance between the two leads leaving the GFCI toward the load, it doesn't matter what they are connected to, it is the unbalance between the current flow in the two leads coming out of the GFCI that trips it..- Hide quoted text - - Show quoted text - * *If there is an imbalance that means current IS flowing in the ground circuit. Sticking yor finger in a socket and grabbing the water faucet will trip the associated GFCI because the current flowed back to ground creating a current imbalance in the hot and nuetral legs. It may or may not have went back via any particular ground wire or other path.. My mentioning *wire was an assumption that had to do with the OPs problem and my earlier suggestion that the wire may be excessively long. In that case ground wire is appropriate. Just one possible solutuion out of many suggest because no one else did. It is equally correct to expalin the basic operation of a GFCI as detecting ground current as it is detecting *and imbalance in current in the hot and return. That is not true. *The second explanation is completely correct and all that is needed. * Here's one to think about. *I connect together two netural wires on a GFI circuit. *What happens? *It trips because there is an imbalance between the hot and neutral currents. There is no path to ground involved. *Or I swap the neutrals on two differenct circuits. *Again the GFI trips and no ground current is involved. "If there is an imbalance that means current IS flowing in the ground circuit." That may be true, but that is not what casues a GFCI to trip. Yes, that true, but per above, it's not the only way to trip one. *Originally Jimmie used the term ground wire. Now he's using ground circuit. *I would say that's an improvement, but still very misleading at best. *I agree with you that few people would hear the term ground circuit and think that circuit includes them standing on a wet cement floor. *The more natural association would be to the ground of the circuit involved. Which I why further down I gave Jimmie the latitude to eliminate the word "wire". His assertion that a GFCI monitors something other than the current flowing in the hot & neutral wires is where I (and apparently you too) have an issue. We might also note with interest that we haven't heard from Jimmie in a while. Perhaps he has chosen to silently acknowledge his error in understanding the way a GFCI spends it's day. Your original statement was "The GFCI breaker works by detecting leakage current on the ground wire" and that is the only point I am arguing. Your statement implies that the device is monitoring the current on the ground wire (how else would it detect the current?) and when it detects the leakage current it trips. I agree. You may call it semantics, but I call it science. The fact remains that your statement "The GFCI breaker works by detecting leakage current on the ground wire" is just plain wrong, regardless of how you try to justify it. I'll even give you some latitude and let you leave off the word "wire". The fact remains that the GFCI doesn't detect to leakage current on any type of ground circuit. Period. It works by detecting the imbalance between the hot and neutral wires. Regardless of where the leakage current is going to, that leakage current itself is not "detected" by the GFCI. It is the *imbalance* between the hot and neutral that is detected.- |
#39
Posted to alt.home.repair
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GFCI Problem
On Jan 8, 7:55*pm, "Stormin Mormon"
wrote: No. Only the GFCI and any outlets down stream from the GFCI. Christopher A. Young Learn more about Jesus *www.lds.org . "croy" wrote in message news Hmmm. *I thought a GFCI outlet covered the whole circuit for ground faults--no? -- croy Depends on how you wire it. If you use the "load" terminals to feed the downstream receps, then yes. If you connect all wires to the "line" terminals then only the GFCI recep itself is protected. Don't even need to pigtail as most GFCI receps use clamp terminals under which you can put two wires each. nate |
#40
Posted to alt.home.repair
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GFCI Problem
On Jan 10, 3:30*pm, N8N wrote:
On Jan 8, 7:55*pm, "Stormin Mormon" wrote: No. Only the GFCI and any outlets down stream from the GFCI. Christopher A. Young Learn more about Jesus *www.lds.org . "croy" wrote in message news Hmmm. *I thought a GFCI outlet covered the whole circuit for ground faults--no? -- croy Depends on how you wire it. *If you use the "load" terminals to feed the downstream receps, then yes. *If you connect all wires to the "line" terminals then only the GFCI recep itself is protected. *Don't even need to pigtail as most GFCI receps use clamp terminals under which you can put two wires each. nate- Hide quoted text - - Show quoted text - You gotta be careful when you reply to a post with a top-posted response. When you say "If you use the load terminals to feed the downstream receps, then yes." it's hard to tell to whom your "Yes" applies. Let me explain how it looks from where I'm sitting... Croy's question was "I thought a GFCI outlet covered the whole circuit for ground faults--no?" Your response, which is under his, could be taken mean "Yes, the whole circuit is protected." We know that that may not be true, since only the load side receptacles are protected, which may not include the "whole circuit". i.e. put the GFCI as the 3rd receptacle in a 5 receptacle branch and only 3 receptacles will be protected. However, if you are replying to Stormin Mormon's comment, whose actual post you responded to, then your Yes could mean that you agree with SM, as long as the circuit is wired properly. Do you see the possible confusion, especially for Croy, who may not understand the subtle difference between "the whole circuit" and "the downstream receptacles", which may or may not be the same thing? |
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