Switchgear

[and!ru]

How do you know what switch gear terminals are a,b, and c phases or since it may not matter is there a standard like top to bottom = a,b,c phases?

 

[LarryFine]

How do you know what switch gear terminals are a,b, and c phases or since it may not matter is there a standard like top to bottom = a,b,c phases?

Yes: A-B-C = top to bottom, left to right, or front to rear.

 

[Another C10]

How do you know what switch gear terminals are a,b, and c phases or since it may not matter is there a standard like top to bottom = a,b,c phases?

Larry got it right above or if unclear you could probably too follow the bussing attachments of the load side of the meter to the bussing.

 

[hillbilly1]

Where it really matters, is high leg systems. The high leg must be the center phase, so if in a gear that can be accessed from the back, the high leg is always the center buss bar.

 

[roger]

How do you know what switch gear terminals are a,b, and c phases or since it may not matter is there a standard like top to bottom = a,b,c phases?

The NEC spells it out in 408.3(E)

Roger