NEMA TYPE INDUSTRIAL CONTROL PANEL

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firsttimeym

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Client has specified that all electrical implement required to be BOTH to NEMA and UL Stanadards,
IF I choose a nema type industrial control panel, dose the dimension must be inch, does metric system acceptable??

for example :
1.the RITTAL baying system TS 8 (Protection category NEMA:– NEMA 12), and the dimension is 800mmx2000mmx400mm(WXHXD)does this type panel can be used in North American market?or must be marked with inch?
2. if I use bolt in the panel, must be inch??
 
firsttimeym said:
Client has specified that all electrical implement required to be BOTH to NEMA and UL Stanadards,
IF I choose a nema type industrial control panel, dose the dimension must be inch, does metric system acceptable??

for example :
1.the RITTAL baying system TS 8 (Protection category NEMA:– NEMA 12), and the dimension is 800mmx2000mmx400mm(WXHXD)does this type panel can be used in North American market?or must be marked with inch?
2. if I use bolt in the panel, must be inch??
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I don't recall that NEMA ever made any requirements that dimensions could not be in metric.

I don't believe there are any NEMA enclosure prohibitions on the use of metric fasteners.

Really, your best bet on this kind of thing is just to discuss it with your customer. They may not want a Rittal style enclosure even if it meets all the NEMA enclosure requirements.

They also may not want metric fasteners even if they didn't say so explicitly.
 
petersonra said:
I don't recall that NEMA ever made any requirements that dimensions could not be in metric.

I don't believe there are any NEMA enclosure prohibitions on the use of metric fasteners.

Really, your best bet on this kind of thing is just to discuss it with your customer. They may not want a Rittal style enclosure even if it meets all the NEMA enclosure requirements.

They also may not want metric fasteners even if they didn't say so explicitly.
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in fact,my customer does not clear about the NEMA,so I am confused
 
NEMA is not a testing authority, so NEMA standards were more like guidelines for manufacturers and although fairly trustworthy for decades when the suppliers were limited, that got out of control when cheap off shore manufacturing exploded. So long ago, UL adopted the old NEMA enclosure environmental design standards almost word for word, meaning they are one and the same standard, except UL provides independent 3rd party testing against them. So in essence although any manufacturer can claim an enclosure as being "NEMA" type 1, 12, 4, etc. and make whatever performance claims their customers may accept, if an enclosure is UL listed as type 1, 12, 4 etc., it will have been actually tested by someone other than that manufacturer to those standards. So it's likely not that the specifier wants you to meet NEMA standards, it's that he want to see a third party testing approval of that from UL.

But no, there is nothing in either standard discussing dimensions or units of measure, totally irrelevant to the performance of the enclosure.
 
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