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#1
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GFCI Fuese
Are there any 20 amp GFCI protected FUSES available. I need to replace one in
a junction fuse box. -- for full context, visit http://www.homeownershub.com/mainten...se-902203-.htm |
#2
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GFCI Fuese
Helen Keech wrote:
Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Just a guess.. If not, there is probably one you could put inline. |
#3
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GFCI Fuese
On 2016-09-03 2:14 PM, Helen Keech wrote:
Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. I doubt it very much, probably better off replacing your panel for breakers if that is an issue or requirement. -- Froz.... |
#4
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GFCI Fuese
On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech
m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. |
#6
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GFCI Fuese
On 2016-09-03 6:12 PM, Bill wrote:
wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. Are you suggesting he merely "plug-in" that string? Is that likely to satisfy code requirements? No he isn't, you should call an electrician. -- Froz.... |
#7
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GFCI Fuese
FrozenNorth wrote:
On 2016-09-03 6:12 PM, Bill wrote: wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. Are you suggesting he merely "plug-in" that string? Is that likely to satisfy code requirements? No he isn't, you should call an electrician. Then the way I understand it, the "downstream" part won't be GFCI-protected. |
#8
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GFCI Fuese
On Saturday, September 3, 2016 at 9:11:31 PM UTC-4, Bill wrote:
FrozenNorth wrote: On 2016-09-03 6:12 PM, Bill wrote: wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. Are you suggesting he merely "plug-in" that string? Is that likely to satisfy code requirements? No he isn't, you should call an electrician. Then the way I understand it, the "downstream" part won't be GFCI-protected. A GFCI receptacle (outlet) will protect whatever is plugged into it and whateven is connected to it's load side. As Gfre suggested, that's an easy way to protect subsequent outlets that are downstream of it. It's very common, including in new construction. One GFCI receptacle in a bathroom providing protection for multiple outlets is an example. To answer your original question, I've never heard of a GFCI fuse replacement that just goes in place of an existing fuse. One reason it can't is a GFCI device needs to be in both the hot and neutral conductors so it can compare the currents, that's how it works. A fuse is only in the hot side on a 120V circuit. |
#9
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GFCI Fuese
On Sat, 3 Sep 2016 21:10:54 -0400, Bill wrote:
FrozenNorth wrote: On 2016-09-03 6:12 PM, Bill wrote: wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. Are you suggesting he merely "plug-in" that string? Is that likely to satisfy code requirements? No he isn't, you should call an electrician. Then the way I understand it, the "downstream" part won't be GFCI-protected. That is precisely why he said you should call an electrician. |
#10
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GFCI Fuese
On Sat, 3 Sep 2016 21:10:54 -0400, Bill
wrote: FrozenNorth wrote: On 2016-09-03 6:12 PM, Bill wrote: wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. Are you suggesting he merely "plug-in" that string? Is that likely to satisfy code requirements? No he isn't, you should call an electrician. Then the way I understand it, the "downstream" part won't be GFCI-protected. If properly installed, all "downstream" components are protected. Upstream are not. Properly installed means connected to the panel with the "line" screws, and the downstream connected to the "load" screws. |
#11
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GFCI Fuese
On Sat, 3 Sep 2016 18:12:29 -0400, Bill
wrote: wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. You sound like you think you have one already that has failed? Well, you need to replace one What? Fuse or GFCI protected Fuse? You're not thinking of Fustats, are you? They screw into the fuse socket and have different pitch threads for each amperage, so you can only screw the correct fustat into the socket. Very popular with landlords who have inadequate wiring and stupid tenants, so the tenant doesn't burn down the place with fuses that are too big. http://www.cooperindustries.com/cont...e_Adapters.pdf Or are you thinking of circuit breakers that screw into fuse sockets. They have one button in the middle. They are not GFCI, and they are not fuses either. They are circuit breakers shaped like fuses. I haven't seen any for sale but they wouldn't be for sale in a store this far from old housing. Maybe in no store these days, but sure enough, Amazon has them. $9.43 for 20 amps. That's only 47 cents an amp. It gets 4.6 stars. https://www.amazon.com/Bussmann-BP-M.../dp/B000GAS1GY They sell Fustats too. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. Are you suggesting he merely "plug-in" that string? Is that likely to satisfy code requirements? Well if the house has fuses now, it probably meets code, and a GFCI in any outlet would be an improvement, right? This is not the kind of change which requires meeting a later code requirement, is it? The biggest problem I see is trying to decide which is downstream and which is upstream. I can see the wiring in my basement laundry room, but I would still have a very hard time figuring out which receptacle the power goes to first and then next. One would have to plug in lights or radios to every outlet, then open up the one one thinks is closest to the fusebox, disconnect one side, and see what other receptacles go dead, not just in the same room but other rooms. Then do the same thing with other receptacles. Unless Helen was only trying to protect |
#12
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GFCI Fuese
On Saturday, September 3, 2016 at 4:55:34 PM UTC-5, wrote:
On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. It could be someone who genuinely ignorant (just means they don't know) about ground fault devices or it could be a skilled troll. The OP could have been speaking to someone or seen an article about electrical safety and really doesn't understand. The OP could also be mistakenly referring to her breaker panel as a "fuse" box. Your suggestion is of course the least costly option but if the home is really old with fuse boxes, there may not be a ground wire in the receptacle boxes. I remember running service calls to really old homes where I wondered how no one had been electrocuted by such primitive wiring. o_O [8~{} Uncle Fused Monster |
#13
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GFCI Fuese
On Sat, 3 Sep 2016 16:07:51 -0700 (PDT), Uncle Monster
wrote: On Saturday, September 3, 2016 at 4:55:34 PM UTC-5, wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. It could be someone who genuinely ignorant (just means they don't know) about ground fault devices or it could be a skilled troll. The OP could have been speaking to someone or seen an article about electrical safety and really doesn't understand. The OP could also be mistakenly referring to her breaker panel as a "fuse" box. Your suggestion is of course the least costly option but if the home is really old with fuse boxes, there may not be a ground wire in the receptacle boxes. I remember running service calls to really old homes where I wondered how no one had been electrocuted by such primitive wiring. o_O [8~{} Uncle Fused Monster GFCIs also mitigate the lack of a ground wire. It is the only legal way to do a replacement of an ungrounded receptacle with a 5-15. |
#14
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GFCI Fuese
On Saturday, September 3, 2016 at 6:12:14 PM UTC-5, wrote:
On Sat, 3 Sep 2016 16:07:51 -0700 (PDT), Uncle Monster wrote: On Saturday, September 3, 2016 at 4:55:34 PM UTC-5, wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. It could be someone who genuinely ignorant (just means they don't know) about ground fault devices or it could be a skilled troll. The OP could have been speaking to someone or seen an article about electrical safety and really doesn't understand. The OP could also be mistakenly referring to her breaker panel as a "fuse" box. Your suggestion is of course the least costly option but if the home is really old with fuse boxes, there may not be a ground wire in the receptacle boxes. I remember running service calls to really old homes where I wondered how no one had been electrocuted by such primitive wiring. o_O [8~{} Uncle Fused Monster GFCIs also mitigate the lack of a ground wire. It is the only legal way to do a replacement of an ungrounded receptacle with a 5-15. It's been a while since I installed any GFCIs and I don't remember the date on my last code book but you mean a newer type GFCI needs no ground wire? o_O [8~{} Uncle Shocked Monster |
#15
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GFCI Fuese
On Saturday, September 3, 2016 at 8:24:05 PM UTC-4, Uncle Monster wrote:
On Saturday, September 3, 2016 at 6:12:14 PM UTC-5, wrote: On Sat, 3 Sep 2016 16:07:51 -0700 (PDT), Uncle Monster wrote: On Saturday, September 3, 2016 at 4:55:34 PM UTC-5, wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. It could be someone who genuinely ignorant (just means they don't know) about ground fault devices or it could be a skilled troll. The OP could have been speaking to someone or seen an article about electrical safety and really doesn't understand. The OP could also be mistakenly referring to her breaker panel as a "fuse" box. Your suggestion is of course the least costly option but if the home is really old with fuse boxes, there may not be a ground wire in the receptacle boxes. I remember running service calls to really old homes where I wondered how no one had been electrocuted by such primitive wiring. o_O [8~{} Uncle Fused Monster GFCIs also mitigate the lack of a ground wire. It is the only legal way to do a replacement of an ungrounded receptacle with a 5-15. It's been a while since I installed any GFCIs and I don't remember the date on my last code book but you mean a newer type GFCI needs no ground wire? o_O [8~{} Uncle Shocked Monster AFAIK, no GFCI ever "needed" a ground wire to function as intended. If it's installed in a location where there is a ground, then the ground wire from the GFCI gets connected. If it's used to replace an old two prong, ungrounded receptacle/s, then the ground wire isn't used, but the GFCI still functions and provides it's intended function even though no ground is present. |
#16
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GFCI Fuese
On Sat, 3 Sep 2016 17:24:01 -0700 (PDT), Uncle Monster
wrote: On Saturday, September 3, 2016 at 6:12:14 PM UTC-5, wrote: GFCIs also mitigate the lack of a ground wire. It is the only legal way to do a replacement of an ungrounded receptacle with a 5-15. It's been a while since I installed any GFCIs and I don't remember the date on my last code book but you mean a newer type GFCI needs no ground wire? o_O [8~{} Uncle Shocked Monster GFCIs never needed a ground wire to function. |
#17
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GFCI Fuese
Uncle Monster
Sun, 04 Sep 2016 00:24:01 GMT in alt.home.repair, wrote: It's been a while since I installed any GFCIs and I don't remember the date on my last code book but you mean a newer type GFCI needs no ground wire? o_O Umm. Unless you know something about GFCI that I don't, it's never needed a ground wire. From what I understand, the GFCI is watching the voltage from hot to neutral and if they become imbalanced, it trips. -- MID: Hmmm. I most certainly don't understand how I can access a copy of a zip file but then not be able to unzip it so I can watch it. That seems VERY clever! http://al.howardknight.net/msgid.cgi?ID=145716711400 |
#18
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GFCI Fuese
On Sun, 04 Sep 2016 00:07:51 +0100, Uncle Monster wrote:
On Saturday, September 3, 2016 at 4:55:34 PM UTC-5, wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. It could be someone who genuinely ignorant (just means they don't know) about ground fault devices or it could be a skilled troll. The OP could have been speaking to someone or seen an article about electrical safety and really doesn't understand. The OP could also be mistakenly referring to her breaker panel as a "fuse" box. Your suggestion is of course the least costly option but if the home is really old with fuse boxes, there may not be a ground wire in the receptacle boxes. I remember running service calls to really old homes where I wondered how no one had been electrocuted by such primitive wiring. o_O [8~{} Uncle Fused Monster My house has fuses and I intend to keep it that way. No nuisance trips. And WTF are they talking about GFCI fuses? No such thing. A fuse does not detect ground faults. -- When Mike got arrested, the police told him, "Anything you say will be held against you." Mike smiled and simply replied, "Jessica Simpson's boobs." |
#19
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GFCI Fuese
On 2016-09-03 7:18 PM, James Wilkinson wrote:
On Sun, 04 Sep 2016 00:07:51 +0100, Uncle Monster wrote: On Saturday, September 3, 2016 at 4:55:34 PM UTC-5, wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. It could be someone who genuinely ignorant (just means they don't know) about ground fault devices or it could be a skilled troll. The OP could have been speaking to someone or seen an article about electrical safety and really doesn't understand. The OP could also be mistakenly referring to her breaker panel as a "fuse" box. Your suggestion is of course the least costly option but if the home is really old with fuse boxes, there may not be a ground wire in the receptacle boxes. I remember running service calls to really old homes where I wondered how no one had been electrocuted by such primitive wiring. o_O [8~{} Uncle Fused Monster My house has fuses and I intend to keep it that way. No nuisance trips. And WTF are they talking about GFCI fuses? No such thing. A fuse does not detect ground faults. You are an idiot, fuses are nuisance trips, and require replacement, breakers allow for a slight current overage before popping. -- Froz.... |
#20
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GFCI Fuese
On Saturday, September 3, 2016 at 9:00:21 PM UTC-4, FrozenNorth wrote:
On 2016-09-03 7:18 PM, James Wilkinson wrote: On Sun, 04 Sep 2016 00:07:51 +0100, Uncle Monster wrote: On Saturday, September 3, 2016 at 4:55:34 PM UTC-5, wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. It could be someone who genuinely ignorant (just means they don't know) about ground fault devices or it could be a skilled troll. The OP could have been speaking to someone or seen an article about electrical safety and really doesn't understand. The OP could also be mistakenly referring to her breaker panel as a "fuse" box. Your suggestion is of course the least costly option but if the home is really old with fuse boxes, there may not be a ground wire in the receptacle boxes. I remember running service calls to really old homes where I wondered how no one had been electrocuted by such primitive wiring. o_O [8~{} Uncle Fused Monster My house has fuses and I intend to keep it that way. No nuisance trips. And WTF are they talking about GFCI fuses? No such thing. A fuse does not detect ground faults. You are an idiot, fuses are nuisance trips, and require replacement, breakers allow for a slight current overage before popping. -- Froz.... While I'm no expert on fuses, physics would seem to suggest that fuses have that feature too. Does a 20A fuse instantaneously melt at exactly 20A? I suspect if you give it 22A it might work for quite awhile, until it generates enough heat to melt, while if you give it 40A, it will blow very quickly. How a fuse curve looks compared to a breaker curve, IDK, but there must be some kind of curve for both. The nuisance with fuses is that when one goes, you have to hope you have the right one and can find it and each time it trips, it's a new fuse. |
#21
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GFCI Fuese
On Sat, 3 Sep 2016 21:00:20 -0400, FrozenNorth
wrote: On 2016-09-03 7:18 PM, James Wilkinson wrote: On Sun, 04 Sep 2016 00:07:51 +0100, Uncle Monster wrote: On Saturday, September 3, 2016 at 4:55:34 PM UTC-5, wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. It could be someone who genuinely ignorant (just means they don't know) about ground fault devices or it could be a skilled troll. The OP could have been speaking to someone or seen an article about electrical safety and really doesn't understand. The OP could also be mistakenly referring to her breaker panel as a "fuse" box. Your suggestion is of course the least costly option but if the home is really old with fuse boxes, there may not be a ground wire in the receptacle boxes. I remember running service calls to really old homes where I wondered how no one had been electrocuted by such primitive wiring. o_O [8~{} Uncle Fused Monster My house has fuses and I intend to keep it that way. No nuisance trips. And WTF are they talking about GFCI fuses? No such thing. A fuse does not detect ground faults. You are an idiot, fuses are nuisance trips, and require replacement, breakers allow for a slight current overage before popping. Do you have ANY idea of the specs of a fuse??? Compared to a breaker? Obviously not - just shooting from the lip, as usual. A standard (Type TC) 20 amp fuse can generally pass 100 amps for 1/10 of a second without blowing.AND 40 AMPS FOR 15 SECONDS. A 20 amp TL slow blow fuse takes over 15 seconds to blow at 30 amps. A standard fuse takes over a minute and a half to blow at 10% over it's rated amperage, A standard thermal trip breaker is similar - in many cases a bit faster - and a magnetic trip breaker will "kick" several times faster thana fuse will blow. |
#22
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GFCI Fuese
On Sun, 04 Sep 2016 02:00:20 +0100, FrozenNorth wrote:
On 2016-09-03 7:18 PM, James Wilkinson wrote: On Sun, 04 Sep 2016 00:07:51 +0100, Uncle Monster wrote: On Saturday, September 3, 2016 at 4:55:34 PM UTC-5, wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. It could be someone who genuinely ignorant (just means they don't know) about ground fault devices or it could be a skilled troll. The OP could have been speaking to someone or seen an article about electrical safety and really doesn't understand. The OP could also be mistakenly referring to her breaker panel as a "fuse" box. Your suggestion is of course the least costly option but if the home is really old with fuse boxes, there may not be a ground wire in the receptacle boxes. I remember running service calls to really old homes where I wondered how no one had been electrocuted by such primitive wiring. o_O [8~{} Uncle Fused Monster My house has fuses and I intend to keep it that way. No nuisance trips. And WTF are they talking about GFCI fuses? No such thing. A fuse does not detect ground faults. You are an idiot, fuses are nuisance trips, and require replacement, breakers allow for a slight current overage before popping. Funny, my mother had a 10A kettle working on a 5A fuse for about 3 months before it blew. -- Peter is listening to "Ministry of Sound - The Sound of Dubstep 4" |
#23
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GFCI Fuese
FrozenNorth wrote :
On 2016-09-03 7:18 PM, James Wilkinson wrote: On Sun, 04 Sep 2016 00:07:51 +0100, Uncle Monster wrote: On Saturday, September 3, 2016 at 4:55:34 PM UTC-5, wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. It could be someone who genuinely ignorant (just means they don't know) about ground fault devices or it could be a skilled troll. The OP could have been speaking to someone or seen an article about electrical safety and really doesn't understand. The OP could also be mistakenly referring to her breaker panel as a "fuse" box. Your suggestion is of course the least costly option but if the home is really old with fuse boxes, there may not be a ground wire in the receptacle boxes. I remember running service calls to really old homes where I wondered how no one had been electrocuted by such primitive wiring. o_O [8~{} Uncle Fused Monster My house has fuses and I intend to keep it that way. No nuisance trips. And WTF are they talking about GFCI fuses? No such thing. A fuse does not detect ground faults. You are an idiot, fuses are nuisance trips, and require replacement, breakers allow for a slight current overage before popping. The correct fuse selection should avoid this nuisance. |
#24
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GFCI Fuese
On Sat, 3 Sep 2016 21:00:20 -0400
FrozenNorth wrote: On 2016-09-03 7:18 PM, James Wilkinson wrote: On Sun, 04 Sep 2016 00:07:51 +0100, Uncle Monster wrote: On Saturday, September 3, 2016 at 4:55:34 PM UTC-5, wrote: On Sat, 03 Sep 2016 18:14:01 +0000, Helen Keech m wrote: Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. Put a GFCI outlet in the first box on the string, feed the down stream from the "load" side. If this confuses you, call an electrician. It could be someone who genuinely ignorant (just means they don't know) about ground fault devices or it could be a skilled troll. The OP could have been speaking to someone or seen an article about electrical safety and really doesn't understand. The OP could also be mistakenly referring to her breaker panel as a "fuse" box. Your suggestion is of course the least costly option but if the home is really old with fuse boxes, there may not be a ground wire in the receptacle boxes. I remember running service calls to really old homes where I wondered how no one had been electrocuted by such primitive wiring. o_O [8~{} Uncle Fused Monster My house has fuses and I intend to keep it that way. No nuisance trips. And WTF are they talking about GFCI fuses? No such thing. A fuse does not detect ground faults. You are an idiot, fuses are nuisance trips, and require replacement, breakers allow for a slight current overage before popping. james is a Brit..do not expect him to know about modern stuff. The UK is abut 40 years behind the USofA |
#25
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GFCI Fuese
On Sun, 04 Sep 2016 00:18:20 +0100, "James Wilkinson"
wrote: My house has fuses and I intend to keep it that way. No nuisance trips. The ironic thing is you could build a brand new house today and use a fuse panel as long as you had the "type S" rejection devices in the sockets that prevent putting in the wrong fuse. The problem becomes the 240v circuits where there is no rejection device although the 30a class fuse holder will not take a 40 or 50. The problem would be the range, wired with 8ga and the next size fuse holder that will take a 60. Then you get down to the AFCI and GFCI requirements although the code does allow the "device type". There is also no money to be saved by doing it. If you could find a 200a fuse panel, it would cost more than a breaker panel by the time you also bought all the required AFCIs and GFCIs. My circa 1971 house in Md did have a 200a fuse panel and aluminum wire. It hasn't burned down yet. |
#26
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GFCI Fuese
On Saturday, September 3, 2016 at 1:14:05 PM UTC-5, Helen Keech wrote:
Are there any 20 amp GFCI protected FUSES available. I need to replace one in a junction fuse box. -- for full context, visit http://www.homeownershub.com/mainten...se-902203-.htm The GFCI looks for equal currents in the hot and neutral conductors, using a transformer with both windings connected. A third winding will have an output if the (other) two currents are not equal. This is why a GFCI will sometimes trip on "noise", because while equal the two currents are at 60 Hz, there is noise" at some higher frequency that is not equal on both conductors. |
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