Re-wiring Hot Water Heater

KnottyBuoyz

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Mar 3, 2006
RO Number
20406
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Hi Guys

I'm hoping for a little guidance from the marine electrical experts around here. I've removed my 5 gal hot water heater (AC & engine heat). What I've found is that the PO had wired it up using standard house wire. First thing I did was rip that out.

There was no ground to the h/w heater. Pos & Neg only. Following the wire back to the panel the Pos & Neg and ground were run to a junction box and the ground terminated there. Oh yeah, household box w/plugs and marettes. Nice job eh?

My question is do I run the ground to the h/w heater and ground it on the casing of the heater? The total wire run from panel to h/w heater is about 16 feet. Would 12/3 triplex marine wire handle the load? I can't find an amperage rating on the h/w heater but it's on a 20 amp breaker and has never popped.

Thanks in advance. I want to do this correctly and safely.

Rick

PS. Just checked all the A/C wiring. It's all household stuff right from the shorepower inlet to the panel and back to the battery charger. Looks like I've got a chore on my hands. It's all comin' out!
 
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