American terminology MCC build.

[Paul_M]

We have had an enquiry from a customer in Atlanta GA. They require what we would describe as a Form 4 MCC. (A panel with individual compartments for each motor starter).

I’m unsure of the American terminology for Form 4, so googling information is proving difficult.

I was wondering if anyone can point me to any regulations these may fall under outside of UL508, I’m currently at tendering side and don’t want to fall foul.

We do design and build quite a lot of Form 2 panels for sale in the US, so knowledge of the circuit design isn't an issue. I know in the UK that form 4 has a different set of rules around it. 

[Paul_M]

For anyone also looking for this. UL Document 845 covers it.