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Old 05-17-2018, 07:55 PM   #21
FF/PM
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I have the Suburban with the outside switch. I'm going to add a 12v switch on my control panel to control the 120v element. I see 2 options. 1 is to figure out how to access the 12v switch wires from inside the trailer then spend hours fishing the wires across the roof to the control panel. 2nd is to add a 120v relay triggered by a 12v lighted switch. I'd add this relay at the power distribution center directly below the convenience center.

Number 2 seems like he easiest solution, but this will be my first serious mod to a trailer. Maybe I'm making it too complicated?

Is there any source for 12v better than another? I have the inverter right there, I can take any.

All input and experience is appreciated!
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Old 05-20-2018, 06:08 PM   #22
Brentw
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Been thinking of doing this myself.
So.
Install a 120 v switch at panel, will require cutting feed to HWT, installing a junction box and carrying a 2 wire to the switch.
Or
Install a 12 v switch at panel and install a relay in the feed to the HWT.

Not sure which to do.

There is 12 DC available in the switch panel, so that is not an issue. The 120 v switch at HWT has already failed so I am bit concerned about the ability of those small rocker switches to be carrying that ampacity.
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Old 05-20-2018, 06:18 PM   #23
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Originally Posted by FF/PM View Post
I have the Suburban with the outside switch. I'm going to add a 12v switch on my control panel to control the 120v element. I see 2 options. 1 is to figure out how to access the 12v switch wires from inside the trailer then spend hours fishing the wires across the roof to the control panel. 2nd is to add a 120v relay triggered by a 12v lighted switch. I'd add this relay at the power distribution center directly below the convenience center.

Number 2 seems like he easiest solution, but this will be my first serious mod to a trailer. Maybe I'm making it too complicated?

Is there any source for 12v better than another? I have the inverter right there, I can take any.

All input and experience is appreciated!
Not really sure what you are trying to do. I just use the 120v breaker in the electrical panel to control the off/on for the HWH.
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Old 05-20-2018, 06:49 PM   #24
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Not really sure what you are trying to do. I just use the 120v breaker in the electrical panel to control the off/on for the HWH.
Probably should admit this publicly, but that just blew my mind. LOL. I will be looking to see if that is all that is on that circuit in my rig. I was just saying that I didn't like how the switch was outside the other day.
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Old 05-20-2018, 07:16 PM   #25
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Not really sure what you are trying to do. I just use the 120v breaker in the electrical panel to control the off/on for the HWH.
Just got our TT but this is what I'm doing. I cannot find a switch anywhere.
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Old 05-21-2018, 07:58 PM   #26
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When my rig is at home I am normally plugged into 15 amp power to keep batteries up and precool the fridge. The breaker panel is on the floor and awkward to get to. Just my luck to forget it and either trip the breaker or run the heater for weeks ( risk burning it out or running HWT dry).The outside switch is easier to get to. That said, there should have been a switch in the control panel.
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Old 05-25-2018, 03:14 PM   #27
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I just use the CB to turn it off, and yes a CB is not meant to be used as a switch but heck a CB is cheap so I carry a spare and it takes maybe 5 minutes to replace it.
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Old 06-21-2018, 10:48 PM   #28
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On my Cougar I used an open 12v switch, pulled power from the awning switch. That switch powers a 110v relay that I put right behind the breaker. All of this wiring was on the same wall. I only had to run 3 feet of 12v wire to the relay, and a few inches of 110v from the breaker to the relay. Now I can power up the heater from inside, and when I winterize I can use the outside switch. Relay and lighted switch cost me about $20 and took about an hour.
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Old 06-22-2018, 04:38 AM   #29
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I just use the breaker....... yes I read all the arguments about a breakerfailing ot not intended to be used that many times BUT if you are concerned go to an electric supply house and purchase a breaker that is SWITCH RATED and is designed to be used for that purpose!
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