Electric Instant Hot water install.

[GregbkH]

There is so much mis-information cast about in threads like these that it is sometimes better to call a certified electrician in your area to get your job done.

I am one and will give my opinion on this.

Easiest way for you to do this is to run a 1" conduit with 6 copper 8 awg thhn conductors along with a copper 10 awg ground wire from your main panel to your water heater. You will need 3 disconnects by the heater. This will be easier and cheaper than running a sub panel to the closet.

If you do run a sub panel, you will need to run a 1/0 copper feed rated for 150 amps due to derating. Also you do NOT bond the neutral and ground in the sub panel. That only takes place at the service.

 

[clemsonfor]

Is this a clothes closet? In general, installing a load center in a clothes closet is a violation of the NEC (240-24(d). Also, be sure to comply with 110-26 (working clearances).

Nope not clothes. It's used as a towel closet and junk closet. It's about 6x7 ft shelves on one wall opposite where the heater will go also a shelf all the way around up at ceiling, few things up there cause wife can reach. And then a bunch of random stuff set in there and tossed in there to get it out of sight.