408.3(E): exception

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frankgi

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Merry Christmas everyone.

Here in NJ (PSE&G jurisdiction) the high leg ("wild" "stinger" "bastard" ect) on the service meter is required to be terminated to "C" phase. In the panel we terminate the high leg to the "B" phase, which is the standard location according to 408.3(E). But by reading the exception to 408.3(E) it states that "shall be permitted to have the same phase configuration as the metering equipment" on a 3-phase 4-wire delta system. Does this apply to panelboards (??) or multisection switchboards (??) The NEC 2002 Handbook states this is acceptable in panelboards, but I am told otherwise by respected colleagues.
Your thoughts?? Would like a little clarification.
Thanks!
 
frankgi said:
Merry Christmas everyone.

Here in NJ (PSE&G jurisdiction) the high leg ("wild" "stinger" "bastard" ect) on the service meter is required to be terminated to "C" phase. In the panel we terminate the high leg to the "B" phase, which is the standard location according to 408.3(E). But by reading the exception to 408.3(E) it states that "shall be permitted to have the same phase configuration as the metering equipment" on a 3-phase 4-wire delta system. Does this apply to panelboards (??) or multisection switchboards (??) The NEC 2002 Handbook states this is acceptable in panelboards, but I am told otherwise by respected colleagues.
Your thoughts?? Would like a little clarification.
Thanks!
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The POCO wants the high leg on C for metering purposes, if this is a new install I would change it after the meter to the B leg and keep it the same, if it is an existing building with some new work being added I would definitely not change it from what is already.
 
acrwc10 said:
The POCO wants the high leg on C for metering purposes, if this is a new install I would change it after the meter to the B leg and keep it the same,
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But that is not keeping it the same, that is changing it. :D

I would keep it the same from stem to stern in a new installation.
 
The high leg must be on the center phase position in all new construction except where the metering equipment is within the switchboard or panelboard. In that case the high leg is permitted to be in the same position as required by the metering equipment. When you leave that main panel to feed another panel you must move the high leg to the B phase position.
 
Why is that the POCO's of the country can't get on board with us, or us with them? Pick one and lets both use it.... If the NEC chose to go for B - I'm left to wonder why? (When?) Anyone????
 
e57 said:
Why is that the POCO's of the country can't get on board with us, or us with them? Pick one and lets both use it.... If the NEC chose to go for B - I'm left to wonder why? (When?) Anyone????
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It is really the B phase as far as the rotation goes even on the power company side. Some of the meters needed to have the high leg in the left or C phase position to make the meter work correctly.
 
Really dont care if b or c but please mark it so everyone knows. Do not assume anything and get out a volt meter before doing anything.A green helper could get you into deeep s---
 
We are in a major remodel/addition to a large home, circa 1940. The house had 200 amp 240 delta, we are changing it to 400 amp single phase. I installed the temp power with a temp pole out by the pedestal near the street.

About 3 weeks later, some sub contractor installs a directional bore direct buried circuit for new street lights. The next day, the GC on my job calls and says that my temp power has a GFI with to much power. Burned up Juan's saw and Jose's drill. I drove over and sure enough, that GFI had 208 volts on it. I called poco, and when the lineman showed up, my temp power had a leg moved off the B phase to C phase and the new street light was on B and neutral. (There was no reason to move mine, as there was plenty of space in the contact block).

He is my point: The contact blocks were marked A, B, & C in small letters on a white tag. There was no color marking on C phase, at all.
 
Minuteman said:
. . . Burned up Juan's saw and Jose's drill. . .
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Why not do them a favor and tell them to file a damage claim with the serving electric utility? Linemen are supposed to be more careful than that and the serving electric utility will pay off if they caused the problem. :smile:
 
charlie said:
Why not do them a favor and tell them to file a damage claim with the serving electric utility? Linemen are supposed to be more careful than that and the serving electric utility will pay off if they caused the problem. :smile:
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because the guy that sold Juan the drill out of the back of his car didn't give a receipt.
 
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