#1. DO NOT GET INTO TUB FULL OF WATER WITH A GROUND FAULT.
2. There is a short. You need to get multimeter and start checking each part for current running to ground wire.
3) Power is ON. Connect power without GFCI.
4) Tape tester leads to wood sticks to keep hands away from power.
5) Do not touch anything directly or you will become the ground rod.
6) Ground wire must be present, and bonded back to main panel box.
7) Do not sit or touch directly on cement or bare ground. Do not touch or lean into anything made of metal.
8) Body and parts must be on sheet of plywood, or similar non-conductive dry surface.
9) Test each part with spa, but also test electric line coming from main box.
10) GFCI will also trip with any fault detected on line. So the wire coming to spa may have the fault.
11) Add a new dedicated line from main box to spa.
http://waterheatertimer.org/How-to-wire-GFCI.html
http://waterheatertimer.org/See-inside-main-breaker-box.html
If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7
SOURCE: gfci breaker for spa
gfci's are designed to trip if they receive voltage on there ground/neutral side, therefore my vote is for Smithbrother I would say there is probably a partial short somewhere in you system.
SOURCE: Main breaker tripping
replacing the main is a possibility and i saw someone suggestion to ck load on each leg of power , also a good idea but one thing i have also seen do this is a loose or corroded connection in the meter base or disconnect which causes a process called electrolysis that is a flaking away of the conductor itself in the meter base or disconnect feeding the panel main breaker and causing heat build up internal to breaker and making it trip but if you replace the main that is the time to check all these connection and it would not hurt to apply a little no lock or some other brand of oxidation inhibitor
SOURCE: Gfi Breaker 2 Pole 20 Amp: installed 20 amp dbl pole breaker to hot tub. Keep...
When Working with Household Electricity you want to always keep in mind that the BLACK wire ALWAYS carries DEATH. What I mean by this is that working with a Single Phase Circuit (one that uses 120VAC) the only wire that should be carrying a voltage is the BLACK one, the other 2 wires (typically the White Neutral and Green Ground) should both be electrically connected to Earth Ground (usually by being attached to your water pipe.)
It is also possible that your hot tub may use more than 20 Amps.
SOURCE: why is my 50 amp GFIC breaker tripping out? I have
There might be a few things here:
1) Big problem >> the #8 wire is a fire hazard connected to a 50Amp breaker
#8 is a 40 amp breaker
#6 is a 55 amp breaker
We put #6 on a 60 amp breaker
Are you saying you hooked the #8 wire to the new 50 amp breaker, and the hot tub called for #6 wire?
Upsize your wire and breaker to meet code
http://waterheatertimer.org/pdf/Wire-size-amp-rating.pdf
2) After putting the correct wire and breaker, you can still have a short in the circuit somewhere
We used to set equipment out in the field in early morning >> the grass was wet >> our equipment was fine, but the tiniest short would cause the GFCI to trip
I don't know where the problem is without a thorough checkout of every possible grounded surface. You need a good multi-meter
3) You better get an electrician over there to have a look before the place burns down or somebody wakes up dead in the hot water.
If I sound a bit scary here, it's because something doesn't sound right with your installation.
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