Red-Yellow-Blue Color

[Cookie]

Correct- though you can have solid gray.

What code section says you can not use gray as a neutral for 120 volts?

 

[Megawatt]

Correct- though you can have solid gray.

What code section says you can not use gray as a neutral for 120 volts?

You cannot use natural gray for the neutral for 277vac mixed in a raceway with 120vac white neutral

 

[Pete999]

You cannot use natural gray for the neutral for 277vac mixed in a raceway with 120vac white neutral

And therein lies the confusion.

 

[Megawatt]

And therein lies the confusion.

Go to article 200.6(D) use and identification of grounded conductors
[automerge]1575392196[/automerge]

Go to article 200.6(D) use and identification of grounded conductors

Also 200.7 read that one also

 

[Cookie]

I read both 200.6 D and 200.7. Neither of which say grey must be reserved for a 277 volt system and white for a 120 volt system when in the same conduit/raceway/ect.


If I wanted to do Brown-Orange-Yellow-Grey for 120/208Y and Black-Red-Blue-White for 277/480Y I could legally do so.

 

[StephenRowley]

Yep, especially in the Maritime environment / Marine Engineering world.

In the HV world its still RYB for our networks

 

[Cookie]

Very true- or RST in Northern Europe?

 

[Megawatt]

I read both 200.6 D and 200.7. Neither of which say grey must be reserved for a 277 volt system and white for a 120 volt system when in the same conduit/raceway/ect.


If I wanted to do Brown-Orange-Yellow-Grey for 120/208Y and Black-Red-Blue-White for 277/480Y I could legally do so.

I didn’t say grey was reserved for 277vac. I said you can’t mix 277 and 120 in the same raceway unless you use grey with a tracer of any color except green. Your last quote about brown orange yellow and you can’t use white for 277. You must not work in the electrical field because all you do is set there and quote Mike Holts books on a UK forum. If you know it all why don’t you have you license. If you and I doubt have a job doing electrical and if you did you would be a helper
[automerge]1575504840[/automerge]

I read both 200.6 D and 200.7. Neither of which say grey must be reserved for a 277 volt system and white for a 120 volt system when in the same conduit/raceway/ect.


If I wanted to do Brown-Orange-Yellow-Grey for 120/208Y and Black-Red-Blue-White for 277/480Y I could legally do so.

No

I didn’t say grey was reserved for 277vac. I said you can’t mix 277 and 120 in the same raceway unless you use grey with a tracer of any color except green. Your last quote about brown orange yellow and you can’t use white for 277. You must not work in the electrical field because all you do is set there and quote Mike Holts books on a UK forum. If you know it all why don’t you have you license. If you and I doubt have a job doing electrical and if you did you would be a helper

Why don’t you ask Mike Holts about 277vac with grey as neutral and 120vac with white as a neutral mixed in the same raceway and see what he says

 

[Cookie]

Nothing stops you from using white at 277 if grey is 120 volts through out the system. Show me the code article that says white must be 120 and grey must be 277 when both are in the same raceway.

 

[Cookie]

I'm not discounting the tracer.