Use of white and Light Gray on same System

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tortuga

tortuga

Code Historian
Location
Oregon
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Electrical Design
Greetings all the question came up recently:
Does the NEC restrict the use of more than one of the types of insulation listed in 200.6(A) for grounded conductors at a single facility? The facility only has one voltage and phase system (200.6(D) does not apply).
For example say the site has 120/240 single phase, I typically am used to seeing all the neutrals or grounded conductors as white conductors (or white with stripes).
The NEC seems to allow both white and light Gray conductors to be used as grounded conductors at this site.
Comments opinions?
Thanks in advance!
 
tortuga said:
Greetings all the question came up recently:
Does the NEC restrict the use of more than one of the types of insulation listed in 200.6(A) for grounded conductors at a single facility? The facility only has one voltage and phase system (200.6(D) does not apply).
For example say the site has 120/240 single phase, I typically am used to seeing all the neutrals or grounded conductors as white conductors (or white with stripes).
The NEC seems to allow both white and light Gray conductors to be used as grounded conductors at this site.
Comments opinions?
Thanks in advance!
Click to expand...

As you note, 200.6(D) does not apply, and even if it did the use of color for system distinction is not mandatory. You could defy convention and use a mix of white and light grey as long as some other marking method distinguished between the neutrals of the two systems.

Both are allowed colors for grounded conductor, and that is all that counts.

That said, mixing them may cause some people frustration later when they try to figure out what the distinction means (when it means nothing.) :)
 
GoldDigger said:
As you note, 200.6(D) does not apply, and even if it did the use of color for system distinction is not mandatory. You could defy convention and use a mix of white and light grey as long as some other marking method distinguished between the neutrals of the two systems.

Both are allowed colors for grounded conductor, and that is all that counts.

That said, mixing them may cause some people frustration later when they try to figure out what the distinction means (when it means nothing.) :)
Click to expand...

Thanks for the replies.

I believe it was just to distinguish the neutrals from different multiwire branch circuits conduits that have more than one.
 
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