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Hoshwa
Wall Heater Installation Question

I am doing some finish work on a remodel. The electrician ran a light blue and neutral wire to the location for a small Nutone electric bathroom wall heater. It is coming out of a steel 4S box through aluminum flex. Question is why he did not run a ground wire? Is it not necessary in this scenerio? The light blue wire is hot, coming from the circuit that the wall heater feed is on? Do I just treat the light blue as hot in connecting to the corresponding THNN wires of the wall heater and of course the same for the neutral, or do I need to run a ground wire through the conduit, connect to device, and then tie in to the ground in the box??? Please help if you can! I am trying to get some final stuff done before a refi appraisal :). Happy Holidays everyone. Thanks.

dj1
Re: Wall Heater Installation Question

Call your electrician and ask him. Ground is required. Also ask him if he ran the wires off a dedicated 20 amp breaker.

Hoshwa
Re: Wall Heater Installation Question

Okay, upon closer inspection I see what he did! He ran a pass through hot circuit wire that is wired to a dedicated 20A breaker. THe circuit is grounded at the first junction box that it passes through in the bathroom. The pass through light blue (hot) then travels to a 4S box on the opposite side of the bathroom wall, so technically it is grounded, however there is a ground wire on the wall heater with no ground wire to tie it into? Should I run a ground wire through the aluminum conduit from the box that feeds the hot to the heater and ground it on the heater? Is it necessary in the case to have a ground to the heater, as long as the circuit is grounded in the first box the circuit hits in the bathroom?

motoguy128
Re: Wall Heater Installation Question

I believe code no longer allow conduit to be used a a ground... although I will be doing just that as rewire my home but leave much of the original wire & conduit that's in good condition.

I'd go ahead and run a ground wire.

dj1
Re: Wall Heater Installation Question

You mentioned a 'first junction box'. What's in this box? are the wire spliced there?

Ideally, you should have a ground wire from the heater directly to the panel.

Another thing to consider: what's the voltage of your new heater?

sparky1
Re: Wall Heater Installation Question

well i dont think the code changed where the race way cant be a ground. The issue might be your local codes. the next thing is if the flex is rated for grounding.

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