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Old 02-16-2015, 04:28 PM   #1
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1974 Argosy 26
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Grounding connections for Power Supply

I'm replacing the copper plumbing on our 1974 Argosy 26' with PEX. There's 2 ground connections coming from the back of the Triad TU 331 Converter. One is soldered to the plumbing. One follows the vent stack below deck - I assume to the frame. I know it's a bad idea to solder to PEX😏. What should I do with that connection?
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Old 02-16-2015, 07:00 PM   #2
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Tie them both to the frame of the AS at one point. The one to the copper was to ground the plumbing for lightning protection as well. PEX doesn't have the same issue electrically as copper. Mine is grounded just forward of the rear bumper to a big bolted in brass lug. There are two ground wires in the lug.


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Old 02-16-2015, 09:18 PM   #3
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Thanks MK. I've since noticed the ground wires come from the breaker box, not the the power supply. I imagine the answer is the same tho....


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Old 02-16-2015, 10:31 PM   #4
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Yep. They should start at the ground buss in the breaker box. The bare ground/safety earth/green ground wires to your outlets should also terminate there. There also is a neutral buss in there for the white wires. Do NOT tie that buss to ground. It has to float in an AS. The neutral lead goes out of the breaker box to the shore power connector and then to the plug at the end of the shore power cord.


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Old 02-17-2015, 07:51 PM   #5
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Probably doesn't need saying but when splicing copper to aluminum use lugs rated for both metals and use lots of "goop". CuAl aid, no-ox, penetrox, or whatever flavor you can locate.
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