UL 508A disconnect clarification questions
UL 508A disconnect clarification questions
(OP)
How does AB and others produce 508A industrial control panels with a motor starter (such as the Bulletin 530 & 570) without using a disconnect switch?
Furthermore, for any disconnect (fused or non-fused switch type) do I understand correctly that in order to be used as an industrial control panel disconnect it must have the WHTY CCN rather than the NLRV CCN? I read it as the NLRV is intended for use as an individual motor disconnect rather than an industrial control panel disconnect.
Furthermore, for any disconnect (fused or non-fused switch type) do I understand correctly that in order to be used as an industrial control panel disconnect it must have the WHTY CCN rather than the NLRV CCN? I read it as the NLRV is intended for use as an individual motor disconnect rather than an industrial control panel disconnect.





RE: UL 508A disconnect clarification questions
"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies