Help wiring a tankless water heater in basement

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  #1  
Old 01-06-19, 06:25 PM
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Help wiring a tankless water heater in basement

Hello all!

I need some help running a tankless water heater in an unfinished basement.

Here is the situation: the tankless water heater will be mounted on the inside of a concrete foundation wall. It calls for 2 50-amp breakers and I will be wiring it with 6 gauge wire. To get to the distribution panel, the wire will exit the tankless water heater, go up to the top of the bare concrete wall, and then go through the floor joists, and finally come down some exposed beams to get to the distribution panel.

My question is what type of wire to use. I know that ROMEX cannot run on exposed concrete, so I would need wire to be placed in conduit.

Could I simply run ROMEX 6/2 and place it in conduit only for the section where it runs across exposed concrete? And then exposed wire once it gets to the floor joists? Or is there a better way to do all this?

Thanks in advance!
 
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Old 01-06-19, 06:40 PM
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Welcome to the forums.

Put up a piece of wood (running board) and fasten the cable to that.
A 1x3 or 1x4 would be fine.
 
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Old 01-06-19, 07:32 PM
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Here is the situation: the tankless water heater will be mounted on the inside of a concrete foundation wall.

And there is a disconnect switch built into the heater? I actually prefer a conduit sleeve up to the top of the concrete wall over a wood running board, but either is acceptable.
 
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Old 01-06-19, 07:33 PM
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There is not a disconnect switch built into the heater. How would that change things? I wasn't planning on wiring in a disconnect switch as it is within sight of the distribution panel.
 
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Old 01-06-19, 07:56 PM
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I wasn't planning on wiring in a disconnect switch as it is within sight of the distribution panel.

In your case, no need for a disconnect switch.
 
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