200.6(D) Three systems

[chris kennedy]

I have a building that will have the following three systems;

208/120 3? 4W (existing)
480/277 3? 4W
400/230 3? 3W

I plan on using;

208
Black
Red
Blue
White

480
Brown
Purple
Yellow
Grey

400
?
?
?

Is there a standard here now for this?

Thanks

 

[ron]

If you said it was 400/230 3Ph 4W, I would have guessed you were in a datacenter. But since 3W, I couldn't guess.
In any case, it is not dictated, just like the other systems, so i would pick something that you could get at a supply house easily.

 

[chris kennedy]

If you said it was 400/230 3Ph 4W, I would have guessed you were in a datacenter. But since 3W, I couldn't guess.

I'm not ruling out 4 wire yet. I have conflicting info here. Tranny specs state 400y/230 but secondary raceway specs 3 1/0's. This is for a printing press. Schedule for the 400V panel reads as follows.

Printer: 3#12 20A 3?
Vacuum pumps: 3#8 50A 3?
Dryer: 3#2 80A 3?
Blower: 3#12 20A 3?
Service outlet: 2#12 20A 1? (2 pole)

So I'm trying to find out what the highlighted item is.

 

[augie47]

Obviously your AHJ may have input, but I have encountered this previously and, fortunately, one of the three (or more) systems had limited use.
As 210.6 only requires a means of identification and does not dictate color, the E/C "tagged" the exposed conductors on the oddest system using a label maker.

 

[Little Bill]

I'm not ruling out 4 wire yet. I have conflicting info here. Tranny specs state 400y/230 but secondary raceway specs 3 1/0's. This is for a printing press. Schedule for the 400V panel reads as follows.

Printer: 3#12 20A 3?
Vacuum pumps: 3#8 50A 3?
Dryer: 3#2 80A 3?
Blower: 3#12 20A 3?
Service outlet: 2#12 20A 1? (2 pole)

So I'm trying to find out what the highlighted item is.

Some of the machines I've had to work on had a maintenance outlet, the rest of the machine could be powered down and the outlet remained live for tools etc.

 

[Finite10]

I'm not ruling out 4 wire yet. I have conflicting info here. Tranny specs state 400y/230 but secondary raceway specs 3 1/0's. This is for a printing press. Schedule for the 400V panel reads as follows.

Printer: 3#12 20A 3?
Vacuum pumps: 3#8 50A 3?
Dryer: 3#2 80A 3?
Blower: 3#12 20A 3?
Service outlet: 2#12 20A 1? (2 pole)

So I'm trying to find out what the highlighted item is.

Could be Royse units. Komori or Heidelberg press(es)? Chiller?

Wouldn't be the first time a neutral was needed at a press and they call for a 3 wire feeder. Check if you can, CYA if you can't.
For 480V we use BN, OE, YW, GY