Electrical for Steam Shower Install


Old 03-25-20, 01:36 PM
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Electrical for Steam Shower Install

I've got a 7.5 KW Amerec unit that is 130 feet from the panel to the unit. I wanted to check some things: is 6/3 thhn correct? Is the recommended 30 amp breaker correct, and should it be a GFCI? Amerec says it doesn't need to be GFCI, but not sure that is correct.
Old 03-25-20, 03:15 PM
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My steam generator is not on a GFCI breaker. My steam generator is located in a different room than the bathroom which might make a difference.

Does your steam generator have an automatic drain? If not make sure you install it so it is easy and convenient to manually drain it. I'm on a well and have a lot of minerals in my water so frequent draining is important.
Old 03-25-20, 04:40 PM
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Welcome to the forums.

If you are running conduit...... then you use THHN wire.
If you are running cable then it's NM-b w/ground.

Your 7.5kw heater requires #8 wiring and a 2P40 breaker or equivalent.
That would mean if your heater is 240v only..... you would use 8-2 NM-b w/gr as neutral is not required. If your heater is 120/240v then you will need 8-3 NM-b w/gr.

Since your heater draws just over 30A..... a 30A breaker is not sufficient. You would need to use the next step up based on panel manufacturer and breaker size availability.

CasualJoe voted this post useful.

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