210.4 (D)

[ryan_618]

First of all, why is this only a requirement on multiwire circuits. Secondly, If you have two nominal voltage systems in a building, is it permissible to deviate from your coloring scheme once you have established it? Example: 208/120 black, red, blue. 480/277 brown, orange, yellow. Can I have a red or blue switch leg on a 277V circuit? I'm not saying this is good pratice, I just want to know if it is LEGAL? Thanks in advance

 

[don_resqcapt19]

Re: 210.4 (D)

In my opinion, if the switch leg is part of a multiwire branch circuit, then you must use the phase color for the switch leg. If its not a multiwire circuit, then the color code is not required.
Don

 

[donnie]

Re: 210.4 (D)

According to the NEC , do you really think color coding such as Black , Red , Blue , and Brown , Orange , Yellow . are requirements of the code, or are you saying it is just a good wiring practice.

 

[don_resqcapt19]

Re: 210.4 (D)

Donnie,
Under the requirements of 210.4(D) identification as to phase and voltage is required for conductors of multiwire branch circuits, wherever these conductors are accessible, if there is more than one voltage system in the building. Using colored insulation is the easiest way to comply with the code section, but any type of identification is permitted to be used. The method used to identify the phase and voltage must be posted at every panel that feeds branch circuits.
Don