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Old 06-27-2014, 01:30 PM   #1
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1976 Argosy 26
Manzanita , Oregon
Join Date: Jun 2014
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An unexpected spark

I was wiring a temporary plug onto the end of the hot water heater circuit in my 76 argosy today.

Touched the metal plug housing to the positive battery terminal and surprise! Sparks! The AC circuit was OFF.

?????

It took a minute to figure it out.

The metal housing on the AC plug is bonded to the AC ground which is bonded directly to the trailer frame as is the battery negative. = closed circuit

probably a really unlikely event but worth noting anyways, because at certain times while working on things there are a lot of DC hots floating around, and any tool or appliance with a grounded metal housing would create this effect.

Solution don't be an idiot like me with Dc hots floating around
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Old 06-27-2014, 09:49 PM   #2
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2004 16' International CCD
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Quote:
Originally Posted by Brian Schulz View Post
Solution don't be an idiot like me with Dc hots floating around
Wow - glad you weren't hurt. So exactly what could I do to prevent this problem from happening to me? How would you do it differently if you have to do it again?
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Old 06-28-2014, 09:15 AM   #3
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Morrill , Nebraska
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Disconnect the negative terminal if the battery. Disconnect ALL. 120 volt AC power to the coach.
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Old 06-28-2014, 02:07 PM   #4
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Thanks to both of you. You may have saved someone from a very unpleasant surprise.

I would love it if important safety information like this were repeated more often. Repetition can really help drive a point home.
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