2 voltage configurations on the same ATS

[Scott449]

I have a building with 2 voltages
System 1 (preferred) = 208/120 3 phase
System 2 (backup) = 360/208 3 phase

I have a load that does not care if it sees 208V 2 Pole or 208V 1 pole

I want to connect an ATS ( yes the ATS is rated for this use)

Line 1 of the ATS will be from System 1 at 208v 2 pole
Line 2 of the ATS will be from system 2 at 208v 1 pole

The issue is

The load wires from the ATS. What colors do I make the wires?
What receptacle configuration do I use?

The neutral is the issue
In source 1 we will have 2 hot wires and a ground
In source 2 we have a hot and a neutral and a ground
All is good till we hit the ATS (that IS rates for this application)
There is 3 wires out of the ups to the load.
If the wires are say black, red and green then it will be correct when we are on source 1 and wrong on source #2
If the wires are black, white and green then the reverse is true.

OCP is dealt with upstream.

is there a way around the requirements in section 200 of the NEC?
this is a supervised location.

 

[russ]

I see a transformer in your future.

 

[LarryFine]

I see a transformer in your future.

Hmmm. More than meets the eye.

 

[dbuckley]

Clearly the output side cant have a white conductor, because white is reserved for neutral, and sometimes that conductor isn't a neutral. Thats code Simarlarly for rectepticals; anything that has a 'N' marked on it, or has a pin that is customarily used for a nerutral would be unwise.

Outside of my limited code knowledge, electrically, it can all work; anywhere after the ATS you should have double pole switches and breakers, with all poles being simultaneously opened, with wiring practice appropriate for two hots.