Why you should always invest!

subman · #1 08-01-2009, 02:40 AM

Quote:

Originally Posted by mike31154

With respect to a house not being grounded, if you research the subject, adding a GFCI is actually one of the recommended solutions for making a non grounded circuit safer. Since the GFCI senses current differential between the hot and neutral, a ground wire is actually not needed to make it trip. If you are the path from hot to ground/earth, the GFCI will save your bacon even though there is no ground wire in the circuit. Although your house wiring may not have a ground, earth is still there and there is the potential for you to become the path to it.

Absolutely correct GFCI makes sure the hot and neutral are balanced and will trip when they aren't. The ground wire is negligible in a GFCI setup. I believe that in this situation it would have shut down the system and saved a lot of headaches. The system should have tripped the breaker (any breaker) anyway because the saltwater in the outlet should have overloaded the breaker causing it to trip. The house could be old and still have a fuse panel (often seen in older American houses) and people do stupid things like bypassing the fuse with some metal (pennies) thus they never trip. Breakers aren't perfect either I have seen breakers glow red on a circuit that is shorted out and not tripped. The problem with GFCI is as they age they tend to trip with out enough of a differential. There is no fool proof way to fix this but multiple circuits on seperate GFCI's checked monthly is probably the best.

BlueAbyss · #2 08-01-2009, 08:52 AM

I learned something about GFCIs today, thanks guys... RC is unfortunately down at the moment.

Doug · #3 08-01-2009, 02:02 PM

I have a separate GFCI which was installed just for my tank, with a spearate 15amp breaker in the panel. I run my controller on it, which runs the lights, heater, etc.

My place also has GFCI/AFI, in some rooms, the room my tank is in being one. Those breakers are code here in new homes for some rooms, I think bedrooms. My tank/office is in what would have been a small 3rd bedroom.

The arc faults are very sensitive, and I would not run all my equipment on them, plus as mentioned they dont fire halides.

Plus I always try keep any electricals away from the water, in another area, compartment or whatever and always with drip loops. Not much else I can do. About as safe as possible but when dealing with electricity and all our water, I imagine accidents can still happen, {as with most things in our lives}.