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What factors do i need to take into consideration when switching 270VDC @ 3amps? For a DC motor application, do i need to spec out a DC contactor or can i just derate an AC contactor? If that is possible, where can i find a derate table? Thanks in advance!!!!

Thank you for everyone's responses!!!

i agree with you waross. but heres the question...is one option more correct than the other?

stevenal, would this not be applicable to me if i chose to ground one of the conductors in my 230VAC.

thank you for your input rbulsara. There seems to be so much debate about grounding a hot leg here at my company. Does anyone else have additional input regarding groudning the hot leg of a 230VAC secondary of a tranformer.

thank you for the response. Since this is on a secondary of a transformer, there is no cetertap and it is strictly just 2 legs. so i guess my answer would be to ground one leg and fuse the other. correct??

If i had a standard 460 to 230VAC 60hz transformer, do i need to fuse both legs of the secondary 230VAC or am i suppose to just fuse one leg and ground the other. What does NEC specify?