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Disconnect for Electric WH


fqp25
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Inspected a electric water heater today with no service disconnect in sight of appliance. This seemed kind of odd; checked the installation manual, and it had no mention of a service disconnect.

What I did find in the NEC (422.31) was an appliance not rated over 300V or 1/8 hp, the current overload device can serve as a disconnect.

Does anybody know any better? I have always seen a service disconnect right by the appliance.

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Originally posted by fqp25

Inspected a electric water heater today with no service disconnect in sight of appliance. This seemed kind of odd; checked the installation manual, and it had no mention of a service disconnect.

What I did find in the NEC (422.31) was an appliance not rated over 300V or 1/8 hp, the current overload device can serve as a disconnect.

That's not correct. It's 300 volt-amperes, not 300 volts. There's a big difference.

Does anybody know any better? I have always seen a service disconnect right by the appliance.

As Mike pointed out, the water heater should have either an in-sight disconnect or a locking provision at the out-of-sight disconnect.

- Jim Katen, Oregon

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This municipality goes by their amended version of the IRC, and under their code for electric WH they refer to the NFPA70 (2005 NEC). I guess I got a little confused with the Vol-Amp, but either way I noted that this is not a correct installation. (I am sure 4 out of 5 dentist agree...)

Kurt, have you ever seen a switch for a dishwasher in the city? I use to work construction up there, and there were a few Polish and Ukrainian electricians who installed switches for the dishwasher; like right by the switch for the disposer. We always said it must be a European thing.

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Originally posted by fqp25

Kurt, have you ever seen a switch for a dishwasher in the city? I use to work construction up there, and there were a few Polish and Ukrainian electricians who installed switches for the dishwasher; like right by the switch for the disposer. We always said it must be a European thing.

There's supposed to be a shutoff for the dishwasher; a lot of guys put them on the countertop, and the cognizant electricians put them down in the sink base.

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Let's remember that there have been numerous NEC and other code changes over the years. Unless one knows when a subject installation was installed, has the past code books and is willing to look up the applicable code to back up a finding, I do not think the item should be written up as needing correction.

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