hardworkingstiff
Senior Member
- Location
- Wilmington, NC
Got a call about someone getting shocked when they put their hand in the water at a homeowners association's docks. It's one that I helped remodel back in February. Marina Power and light power centers with a light and GFI receptacle only (no shore power for boats, they are small boats). Panel is about 150? from the ramp to the floating docks. Ramp is aluminum. I ran 4 #6?s (cu.) in PVC and non-metallic flex from the existing panel to the dock and loop fed the power centers with ? of the pedestals on one circuit and the other ? on the other (used 30-amp breakers). I also bonded the aluminum ramp to the ground wire I ran for the power centers.
Here is what I found. With one test lead in the water and one on the ramp, I found 1.9 volts AC. Switched to DC and found less than .01-volts (discounted it as meter sensitivity). I turned off the 200-amp MB in the panel and found the 1.9-volts still present.
I quickly dipped my hand in the water while holding the ramp and felt a little tingle. It was weird though, like only on one finger in one certain area of the finger. I bent that one over and dipped the other three fingers and no sense of shock. I put the ?shocking? finger back in and again the tingle (fairly strong). It turns out that I have about a ?? diameter abrasion from work this week and the 1.9-volts caused the tingling there, but not on my normal skin.
Love to hear comments please.
Thanks,
Lou
Here is what I found. With one test lead in the water and one on the ramp, I found 1.9 volts AC. Switched to DC and found less than .01-volts (discounted it as meter sensitivity). I turned off the 200-amp MB in the panel and found the 1.9-volts still present.
I quickly dipped my hand in the water while holding the ramp and felt a little tingle. It was weird though, like only on one finger in one certain area of the finger. I bent that one over and dipped the other three fingers and no sense of shock. I put the ?shocking? finger back in and again the tingle (fairly strong). It turns out that I have about a ?? diameter abrasion from work this week and the 1.9-volts caused the tingling there, but not on my normal skin.
Love to hear comments please.
Thanks,
Lou
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