MHF for feeding subpanel


Old 08-13-20, 09:15 AM
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MHF for feeding subpanel

I'm installing a new 100amp sub panel in a finished basement with a drop ceiling.
I have 2-2-2-4 MHF to feed the panel. the run is about 60'. Do I need to enclose the MHF in conduit, or can I just strap it up?
Old 08-13-20, 02:46 PM
Join Date: Feb 2016
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Do not use MHF to feed a subpanel from a main panel that is in the same structure. MHF is a direct bury cable and must be in conduit when entering a structure. The proper wire to use is either XHHW-2 in conduit from panel to panel or use SER cable. SER is probably your best bet as it is a jacketed cable and follows the same installation requirement as NM-b. Also #2 aluminum is only to be overcurrent protected to a max of 90 amps. So the feeding breaker can be no larger than 90A. To have the full 100A you need to use 1-1-1-3 Al SER. With that said, since you already have the 2-2-2-4 MHF it needs to be in conduit from panel to panel and fed with 90A breaker
CasualJoe voted this post useful.

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