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Joined: Feb 2001
Posts: 308
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Does anyone happen to know when the code started requiring a certain length of wire at j-boxes? I'm dealing with existing cloth bx and changing fixtures/devices and trying to apply a practical approach.
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Joined: Apr 2002
Posts: 7,382 Likes: 7
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Oldest NEC I have in the office is 1975. 300.14 is in there with 6"
Someone else here has older NECs in their archives & they may have some input.
John
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Joined: Jul 2004
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In old work, from a practical sense, it is what it is. Talk to your AHJ to see what remediation they like there. Typically you can splice on the additional conductor necessary to make the box usable but that is not defined in the code.
Greg Fretwell
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Joined: Apr 2002
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Ditto to what Greg said above as to splicing on extension pieces.
An issue that pops up with replacement fixtures is the temp rating of the 'old' conductors. There is an available sleeve that goes over single conductors that is acceptable to some AHJs.
John
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Joined: Feb 2001
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In this case I am the AHJ. And yes the temp rating is a highly correlated concern. Any links to those sleeves?
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Joined: Apr 2002
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I do not have a link; hopefully someone does. The sleeves come with a few different fixtures that I have seen.
One that sticks to memory is Ruud Lighting, with the wallpack HID fixtures. You may find it thru McMaster Carr.
John
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Joined: Apr 2002
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West: Thanks for that link. Based on the temp ratings...it looks $$$$
John
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Joined: Mar 2004
Posts: 814
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Not to change directions here but are you allowing grounding type receptacles? I have often wondered about this, as the BX provides a grounding path, although questionable and not actually listed for grounding. What do you do?
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Joined: Apr 2002
Posts: 7,382 Likes: 7
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BigB: Best answer I can offer is: "320.108 Equipment Grounding Conductor. Type AC cable shall provide an adequate path for fault current as required by 250.4(A)(5) or (B)(4) to act as an equipment grounding conductor." From the '11 NEC
John
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Posts: 404
Joined: March 2007
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