Transformer protection

[paul hodge]

Anyone know of a website that will give transformer primary and secondary overcurrent protection calculations. Also wire sizes and conduit sizes. I'm aware of article 450, I'm primary interested in 600 volt or less with ampere of 9 or more. Just, looking for Quick reference.

 

[bkludecke]

I think you already have it. NEC + basic electrical theory (ohm's law). A calculator speeds things up some.

 

[bob]

Don't forget 240.21(C)1 thru 6. 450 is just for the transformer.