Conduit cut-outs in sheetmetal walls

[SrGilberto]

Thanks in advance,

All,
I have 2 questions:
1) What are the hole sizes in a sheetmetal wall that is required for a conduit connector for the conduit sizes of
1/2", 1", 1-1/4", and 1-1/2" diameter?

and...

2) What is the required distance from the edge of the hole (keep out area) for the conduit connector?

Thank you for your assistance,

SrG

 

[meterbox]

See ANSI C12.7 for a table of knockout size limits & conduit bushing diameters.

 

[aamoroso]

I would also grab a copy of UL 50, that is the standard that UL would use certify a sheet metal enclosure. If your in Canada you can grab CSA 22.2 No 94 (I think, that is out of the top of my head).

Fill what's empty. Empty what's full. And scratch where it itches.