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Old 09-20-2016, 04:52 PM   #15
Airscream
 
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1986 32.5' Airstream 325
Rio Vista , California
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12 volt

I thought I would add to this thread.
as an electrician in the yacht service biz, ill offer some advice.
check the polarity of the supply wires, most appliances are polarized.
As Iron Man suggests wire size and overcurrent protection is a must.
for best performance ,run a dedicated circuit to your buss panel or pick up power at the input to the converter. over current,fuse/breaker should be at the head of the power source, not at the appliance end. Wire size should be determind by the current/amp rating of the device, and de rated for length.
Do not use the chassis or frame for your ground route the negative to a ground where you get your positive supply voltage.
wishing you all the best on your installation. make it safe.
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Old 09-20-2016, 05:21 PM   #16
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1973 31' Sovereign
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Can you tell us what type/brand heater and converter you are using? Also what all runs on the circuit that you are tapping into? Some converters send 12V AC to the lighting circuits. also how does the speed control work, if electronic it might be polarity or ripple sensitive. Something is not meeting the eye about this situation and more information is needed.
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Old 09-20-2016, 07:06 PM   #17
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Ok, so I abandoned ship on trying to tap into other, existing 12v wiring and decided to run new wires direct to the battery (which fixes the problem). I'll chalk the original issue up to a bad or weak ground.

Next question: I'm gonna have to run a marine grade duplex wire along the drain and water lines to get it done. Anyone see any issue doing this? I had 12v wires running in my boats bilge without issues. Can't see it being a problem here.

Someone above asked which heater I bought. It's the Dickinson Marine P12000.
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Old 09-21-2016, 12:46 AM   #18
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1974 31' Sovereign
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Quote:
Originally Posted by gomotomoto View Post
Ok, so I abandoned ship on trying to tap into other, existing 12v wiring and decided to run new wires direct to the battery (which fixes the problem). I'll chalk the original issue up to a bad or weak ground.

Next question: I'm gonna have to run a marine grade duplex wire along the drain and water lines to get it done. Anyone see any issue doing this? I had 12v wires running in my boats bilge without issues. Can't see it being a problem here.

Someone above asked which heater I bought. It's the Dickinson Marine P12000.
Don't see any problems running the wires as described. Consider putting them in some split loom if you'll have space. Zip tie to keep them from moving around to much.

Those Dickinson Marine heaters are nice and gorgeous! Good choice!
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Old 09-21-2016, 06:04 AM   #19
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Assuming no thermostat to turn on or off the fan, maybe a direct connection to ground via a new wire attached to metal would help....


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