277v heat pump wiring

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trump

New member
I will be installing 125 single room thru the wall heat pump units. I will be using 277v power source but per the NEC 440.60, I would have to hard wire it instead of using a receptacle. The manufacture could supply a sub base with a receptacle & plug concealed in it. I'm concerned about meeting the NEC requirements. Has anybody run into this situation? I could maybe install a disc. switch in the sub base. I'm up for any suggestions.
Thanks,
Trump
 
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frenchelectrican

Senior Member
Location
Nord'est Wisconsin et Paris France
Re: 277v heat pump wiring

trump the 277 volts and three phase units are required to be hard wired per nec 440.60 i have experince with it and what i did i put j box right next to the unit and run heveywall fexible conduct ( it is less than 8 inch ) and hook it up permenently unless someone try to take it out and the new units the jbox are located the inside of units now

merci marc
 
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