As you may recall from my earlier posts, I’m planning to configure and install three electric tankless water heaters (two 14kW’s & one 9kW). They are all 240V. The 14kW’s each require a 60A breaker, and the 9kW requires a 30A. Each of these units are described as “point-of-use” water heaters by the manufacturer. I want to install them in a closet in my central bathroom. This will give them the greatest proximity to the fixtures they will serve. I know that the NEC will not allow service equipment in a bathroom, even a subpanel (which I’m assuming would include disconnects).
I also know that water heaters must either have a line-of-sight disconnect, or a lockable breaker controlling the circuit. Since my units are going to be tankless, electric, catagorized as “point-of-use” water heaters, and mounted in a closet, will the NEC allow them to be placed in a bathroom, with a lockable breaker in the SEP?
Thanks in advance,
Michael
New knowledge is priceless.
Used knowledge is even more valuable.
Replies
I believe that the NEC allows a plug.
Put in a 240v twist-lock plug next to the heater
You now have a disconnect
"even a subpanel (which I'm assuming would include disconnects)."
I don't have time to look it up, but there is an exception. But I don't remember the wording. I think that it somelike "except for application equipment) or some such thing.
If that is what it is then I would think qualify.
And then there is a question of whether the closet is part of the bathroom or separate space.
And the cord and plug disconnect probabably can't be used unless the installation instructions mentions that option.
If this is an inspected project then I get get approval first.
There is enough borderline questions to ask first.
.
A-holes. Hey every group has to have one. And I have been elected to be the one. I should make that my tagline.
Throughout Western Washington, we have used properly sized, fused, and circuited cords and plugs as a method of disconnect on POU heaters.