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#41
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Receptacles -- # of wires per screw
"Tom Horne" wrote in message ... On Feb 12, 3:45 pm, "RonABC" wrote: Tom Horne wrote: This last statement is untrue. The code requires six inches of wire in the box and extending at least three inches beyond the opening of the box "for splices or the connection of luminaires (fixtures) or devices." The code does not require that the conductors be that long after the splices are made up and the devices installed. I think you may be misreading what the code says and you are incorrectly concluding that, after the splices are made, the length of conductor rule no longer applies. The requirements are under 300.14, and then it says: "Exception: Conductors that are *NOT* (emphasis added by me) spliced or terminated at the outlet, junction, or switch point shall not be required to comply with 300.14." In other words, conductors that *ARE* spliced or terminated at the box do have to comply with 300.14 even after they are spliced or terminated. Only the unspliced or un-terminated-at-the-box conductors do not have to comply. Ron I was not basing my position on the exception bout on the wording I quoted in my reply. Two different boards of appeal that I know of have come down in the same place. I know of no contrary formal interpretation. I'll quote the whole section so that those without ready access can follow the discussion. "300.14 Length of Free Conductors at Outlets, Junctions, and Switch Points. At least 150 mm (6 in.) of free conductor, measured from the point in the box where it emerges from its raceway or cable sheath, shall be left at each outlet, junction, and switch point for splices or the connection of luminaires (fixtures) or devices. Where the opening to an outlet, junction, or switch point is less than 200 mm (8 in.) in any dimension, each conductor shall be long enough to extend at least 75 mm (3 in.) outside the opening. Exception: Conductors that are not spliced or terminated at the outlet, junction, or switch point shall not be required to comply with 300.14." My position, and the position of the Virginia state board of permit appeals, is that the six inches of free conductors is required in order to have enough wire to make the splices and connections during make up and not forever afterward. -- Tom Horne That's all fine and well, but it would really be helpful if in the future, you preface your replies to indicate that you're quoting some particular entities interpretation of the NEC |
#42
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Receptacles -- # of wires per screw
On 2/13/2009 2:12 PM Steve Barker spake thus:
it's actually easier to pigtail than to stuff an outlet back in with all 4 on IT. I just did it both ways last night, and the pigtailing is far easier. That could be true, and I'll take your word for it, but there's still the problem of all the extra room needed for wirenuts. Might work fine in a nice roomy 4x4 box, not so well in an existing duplex outlet box. -- Personally, I like Vista, but I probably won't use it. I like it because it generates considerable business for me in consulting and upgrades. As long as there is hardware and software out there that doesn't work, I stay in business. Incidentally, my company motto is "If this stuff worked, you wouldn't need me". - lifted from sci.electronics.repair |
#43
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Receptacles -- # of wires per screw
On Feb 10, 11:29*am, "RonABC" wrote:
wrote: On Feb 10, 12:24 am, "RonABC" wrote: Is it possible that the code allows two ground wires to be connected to the one green grounding screw, but does not permit two wires per screw for the white and black wires? No, the grounds are bare so it is easy to twist them together in the back of the box and cut one off short. Then you hook the remaining wire over the single green screw and tighten it down. I assume that you mean twist them together using a wire nut (such as a green one with a hole in the center), since just twisting them together without one doesn't meet the code. Also, if the wire that is cut off short leaves it with less than 6 inches of wire in the box, that would not meet the code requirements. I read that as 'Twist bare ground wires together place the twisted section under screw of the metal box and then use one of the wires to connect to the duplex'. Unless the outlet is being 'split' (For say an Edison circuit or to switch one of the hots of the outlet) there is provision on a typical duplex to terminate two white neutrals and two black live wires. Other than that pigtail them. And yes I prefer a good quality duplex that has those terminals that trap the stripped wire end under a metal plate as screw is tightened down. |
#44
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Receptacles -- # of wires per screw
"RBM" wrote in message ... "Tom Horne" wrote in message ... On Feb 12, 3:45 pm, "RonABC" wrote: Tom Horne wrote: This last statement is untrue. The code requires six inches of wire in the box and extending at least three inches beyond the opening of the box "for splices or the connection of luminaires (fixtures) or devices." The code does not require that the conductors be that long after the splices are made up and the devices installed. I think you may be misreading what the code says and you are incorrectly concluding that, after the splices are made, the length of conductor rule no longer applies. The requirements are under 300.14, and then it says: "Exception: Conductors that are *NOT* (emphasis added by me) spliced or terminated at the outlet, junction, or switch point shall not be required to comply with 300.14." In other words, conductors that *ARE* spliced or terminated at the box do have to comply with 300.14 even after they are spliced or terminated. Only the unspliced or un-terminated-at-the-box conductors do not have to comply. Ron I was not basing my position on the exception bout on the wording I quoted in my reply. Two different boards of appeal that I know of have come down in the same place. I know of no contrary formal interpretation. I'll quote the whole section so that those without ready access can follow the discussion. "300.14 Length of Free Conductors at Outlets, Junctions, and Switch Points. At least 150 mm (6 in.) of free conductor, measured from the point in the box where it emerges from its raceway or cable sheath, shall be left at each outlet, junction, and switch point for splices or the connection of luminaires (fixtures) or devices. Where the opening to an outlet, junction, or switch point is less than 200 mm (8 in.) in any dimension, each conductor shall be long enough to extend at least 75 mm (3 in.) outside the opening. Exception: Conductors that are not spliced or terminated at the outlet, junction, or switch point shall not be required to comply with 300.14." My position, and the position of the Virginia state board of permit appeals, is that the six inches of free conductors is required in order to have enough wire to make the splices and connections during make up and not forever afterward. -- Tom Horne That's all fine and well, but it would really be helpful if in the future, you preface your replies to indicate that you're quoting some particular entities interpretation of the NEC And furthermore, what business does the state of Virginia, or any other state, have to interpret National Electric Code? They have the right to use it, or not, they can make their own code if they choose, but the NFPA, the people who write the NEC, have panels of their own, who you can write to, to have any section of code interpreted. How arrogant that would be for someone to believe that they can interpret something better than it's author. |
#45
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Receptacles -- # of wires per screw
A common practice with conduit wiring is to leave the wires intact
running through to box, leaving enough slack to meet wiring requirements. Then just strip enough insulation to wrap around the screw terminal. Conceivably, this practice could be used with NM cable, but it would require a lot of effort during the cable run process. |
#46
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Receptacles -- # of wires per screw
In article ,
Kevin Ricks wrote: I prefer back feed type outlets which will take as many as 4 wires on each side. Not as good as using pigtails but better and much easier than wrapping wires around screws. On occasion I will feed 2+ outlets or switches with a single wire. I strip enough insulation off to wrap around a screw then continue the same wire to the next outlet/switch. Kevin Hi! What's a "back feed type outlet"? Thanks! David |
#47
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Receptacles -- # of wires per screw
In article ,
wrote: On Feb 10, 12:24*am, "RonABC" wrote: *So, wouldn't it be easier if the receptacle had 6 screws? -- two for the two black wires, two for the two white wires, and two for the two ground wires? Is it possible that the code allows two ground wires to be connected to the one green grounding screw, but does not permit two wires per screw for the white and black wires? No, the grounds are bare so it is easy to twist them together in the back of the box and cut one off short. Then you hook the remaining wire over the single green screw and tighten it down. For fixtures where you "need" to connect two wires to a single screw, take a short length of same-colored wire and bug it on to the two wires as a pigtail using a crimped Buchanan connector or a wire nut. Are you saying that when you need to connect two wires to a screw, what you do is pigtail THREE wires together, and then that third wire, the new, short one, and hook THAT one to the screw? Thanks, David |
#48
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Receptacles -- # of wires per screw
David Combs wrote:
In article , wrote: On Feb 10, 12:24 am, "RonABC" wrote: So, wouldn't it be easier if the receptacle had 6 screws? -- two for the two black wires, two for the two white wires, and two for the two ground wires? Is it possible that the code allows two ground wires to be connected to the one green grounding screw, but does not permit two wires per screw for the white and black wires? No, the grounds are bare so it is easy to twist them together in the back of the box and cut one off short. Then you hook the remaining wire over the single green screw and tighten it down. For fixtures where you "need" to connect two wires to a single screw, take a short length of same-colored wire and bug it on to the two wires as a pigtail using a crimped Buchanan connector or a wire nut. Are you saying that when you need to connect two wires to a screw, what you do is pigtail THREE wires together, and then that third wire, the new, short one, and hook THAT one to the screw? Thanks, David Exactly, you got it. and if the box happens to serve two directions then you have four in the nut counting the pigtail. steve |
#49
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Receptacles -- # of wires per screw
I have heard of "back stab" outlets. Perhaps that's the
term we're seeking? -- Christopher A. Young Learn more about Jesus www.lds.org .. "David Combs" wrote in message ... In article , Kevin Ricks wrote: I prefer back feed type outlets which will take as many as 4 wires on Kevin Hi! What's a "back feed type outlet"? Thanks! David |
#50
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Receptacles -- # of wires per screw
In article ,
"Stormin Mormon" wrote: I have heard of "back stab" outlets. Perhaps that's the term we're seeking? Why is it that you don't believe the many people who have very clearly explained the problems with your sig line, and your top-posting? Poster A made a statement. Poster B asked for a definition of a term. Then along you come and top-post. Now, where would I reply to your post, so that the posts follow one another in logical, sequential order? And how would I do it, since your sig line is ****ed up? No. Back stab and back feed are two different animals. We go over this at least once a month. |
#51
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Receptacles -- # of wires per screw
A backfeed outlet has holes in the back. You strip the wire and "stab"
it into the hole. It has spring clips inside that grab the wire. They save a lot of time because you just strip and stab. But many professional electricians won't use the backstab method because over time the copper clips heat up and create a bad connection. Once they start heating up the extra resistance creates even more heat until the connection fails. Most common symptom of this is intermittent operation. Backstabbing has a much higher failure rate than wire wrapping around the screws. It's a shortcut that can bite you down the road. Hi! What's a "back feed type outlet"? Thanks! David |
#52
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Receptacles -- # of wires per screw
In article ,
Rick-Meister wrote: A backfeed outlet has holes in the back. You strip the wire and "stab" it into the hole. It has spring clips inside that grab the wire. They save a lot of time because you just strip and stab. But many professional electricians won't use the backstab method because over time the copper clips heat up and create a bad connection. Once they start heating up the extra resistance creates even more heat until the connection fails. Most common symptom of this is intermittent operation. Backstabbing has a much higher failure rate than wire wrapping around the screws. It's a shortcut that can bite you down the road. Arrghh. A back feed outlet has holes in the back, but it does not have springs. It has screw driven clamps. |
#53
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Receptacles -- # of wires per screw
Smitty Two wrote:
In article , Rick-Meister wrote: A backfeed outlet has holes in the back. You strip the wire and "stab" it into the hole. It has spring clips inside that grab the wire. They save a lot of time because you just strip and stab. But many professional electricians won't use the backstab method because over time the copper clips heat up and create a bad connection. Once they start heating up the extra resistance creates even more heat until the connection fails. Most common symptom of this is intermittent operation. Backstabbing has a much higher failure rate than wire wrapping around the screws. It's a shortcut that can bite you down the road. Arrghh. A back feed outlet has holes in the back, but it does not have springs. It has screw driven clamps. And those are the type I prefer for stranded wire. You don't have to crimp a forked connector onto the wire to hook it to the outlet. TDD |
#54
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Receptacles -- # of wires per screw
On Feb 14, 12:23*am, David Nebenzahl wrote:
On 2/13/2009 2:12 PM Steve Barker spake thus: it's actually easier to pigtail than to stuff an outlet back in with all 4 on IT. I just did it both ways last night, and the pigtailing is far easier. That could be true, and I'll take your word for it, but there's still the problem of all the extra room needed for wirenuts. Might work fine in a nice roomy 4x4 box, not so well in an existing duplex outlet box. Might work fine in a nice roomy 4x4 box, not so well in an existing duplex outlet box. I think if you do the "fill calc" (unless I did them wrong) many duplex outlet boxes are undersized for a lot of multiple wire situations cheers Bob |
#55
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Receptacles -- # of wires per screw
On Fri, 13 Mar 2009 09:08:16 -0700, "RJ" wrote:
A backfeed outlet has holes in the back. You strip the wire and "stab" it into the hole. It has spring clips inside that grab the wire. They save a lot of time because you just strip and stab. But many professional electricians won't use the backstab method because over time the copper clips heat up and create a bad connection. Once they start heating up the extra resistance creates even more heat until the connection fails. Most common symptom of this is intermittent operation. Backstabbing has a much higher failure rate than wire wrapping around the screws. It's a shortcut that can bite you down the road. And yet, they're UL approved. ! What other dangerous products does UL approve ? Aluminum wiring, Urea Formaldehyde insulation, ventless propane space heaters,to name a few, have all at one time or other been approved. |
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