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Old 07-31-2019, 08:03 PM   #1
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Grounds and water heating

The electric heating of my Atwood 10 gal was not heating. After finding the screw-in element, I determined it was not open. Then I woke up and found the the negative terminal of the DC that kicks the relay to send the 120V AC to the element was not connected to anything. It had been soldered to the aluminum tank of the heater but had fallen off. I turned the switch in the RV on to activate the electric heater in the Atwood to start, nothing happened until I touched the negative DC terminal to the aluminum tank, then the relay clicked and the AC started to warm the water. The ground of the nearby AC receptacle and the tank appear to be connected together somewhere (both ground), so would it hurt to connect the negative DC to the AC ground instead of soldering it to the tank as it had been? I'm not sure I have the tools to solder this connection back to the tank.
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Old 07-31-2019, 08:11 PM   #2
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A ground is a ground. I can't come up with any reason it would be an issue.
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Old 07-31-2019, 09:12 PM   #3
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Its a 12 volt circuit. Put a ring terminal on it and put it under a nearby screw to chassis ground.

Stay away from the120 volt safety ground. Its not supposed to carry any current and if it is, it could mess with the GFCI protection.
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Old 08-01-2019, 01:41 PM   #4
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Noticed you are kinda new on IRV2 and wanted to say hello!

I agree with Twinboat's assessment! Have fun and keep her between the ditches!

Good luck, happy trails, and God bless!
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