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Joined: Aug 2002
Posts: 402
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I personally don't like the tie wraps. It looks nice but hard to change a wire later on.
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Joined: May 2003
Posts: 2,876
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Dave, the panel with the phasing issue wouldn't fly here. It would have to be A - B, (black - red) left to right, top to bottom. Service, feeder, and branch circuits. It's really common requirement in most areas. So all A phase black, all B phase red. Even two wire circuits.
Mark Heller
"Well - I oughta....." -Jackie Gleason
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Joined: Apr 2001
Posts: 449
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Nice job, Dave. I'd be in trouble e57. I pull thwn in emt for a lot of my homeruns and I use red, black, yellow, pink, purple, orange, blue and brown for circuit ID purposes. Phase ID here only applies to the line side conductors(feeder/SE) of a panel whether they are 3 phase or single phase.
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Joined: Jan 2002
Posts: 1,457
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Looks good. I too would skip the ty wraps. What are you guys talking about "phasing issue"?
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Joined: May 2003
Posts: 2,876
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It's not NEC, but common practice. For us in SF it is required to phase all circuits. This is an example of our local code.
210-5(c). Add the following new section:
(c)Ungrounded Conductors. Underground conductor insulation shall be color coded as follows:
(1)One-hundred-twenty/two-hundred-forty-volt 3-wire circuits - “A” phase black, “B” phase red; 120/208 volt 4-wire 3-phase wye circuits - “A” phase black, “B” phase red, “C” phase blue; 120/240 volt 3-phase delta circuits - “A” phase black, “B” (high leg) phase purple, “C” phase red; 277/480 volt 4-wire 3-phase wye circuits - “A” phase brown, “B” phase orange, “C” phase yellow.
(2)Conductors for switch legs may be of a different color than the phase conductor other than green, white or gray when suitably identified at pull, junction and outlet boxes with marking tape, tagging or other equally effective means.
(3)Conductor insulation shall contain the applicable color pigment for circuit wire #14 AWG through #10 AWG. Ungrounded conductors #8 AWG and larger and ungrounded conductors of any size in cable assemblies may be pigmented colors other than green, white or gray, provided they are suitably identified at pull, junction and outlet boxes with marking tape, tagging or other equally effective means.
Mark Heller
"Well - I oughta....." -Jackie Gleason
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Joined: Apr 2002
Posts: 558
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Mark, since this is a single phase system all conductors would need to be either black or red the way I read the SF code. There isn’t an A and B phase. When you install NM cable are you required to change the black wires to red in just the panel or every box they run to?
I actually like using ty-wraps but only a couple per side. They are easy to cut off later if needed.
Curt
Curt Swartz
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Joined: May 2003
Posts: 2,876
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Yes, on the panel, raceway, and boxes. I usually try to pull only 3-wire to panels so it's not that bad, and use the red in the first box until they seperate. Same idea for 4-wire.
Mark Heller
"Well - I oughta....." -Jackie Gleason
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Joined: Sep 2003
Posts: 650
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You'd think that in a market as large as San Francisco, that someone would be making up NM with Red/White/Bare.
-Jon
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Joined: Jun 2004
Posts: 206
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Dave, nice job. Gives new meaning to 110.12.
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Joined: May 2004
Posts: 697
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Thanks capt al, I was just about to state my regrets on posting after pictures to a tough audience.
Dave
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Posts: 28
Joined: March 2011
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