Originally Posted by enid
I am 95% done with my E-Brewery. I tested the system and everything works great except for one thing that concerns me. When I hit the test button on the GFCI it does not trip the breaker. Here is what I have.
40A breaker in my main panel running 6/2 (2-120V hots and ground) wire going to a range/dryer plug. I then ran 8/2 wire and 3 prong range plug to a spa disconnect. Connected two hots to the line lugs in disconnect, and ground to ground bar. Then ran the two load wires out of the breaker and ground to ground bar. There is no neutral as this is only 240V. I ran the neutral pigtail from breaker to the neutral bar but their is nothing attached to it.
I have been hearing different answers to this. Some say you need the neutral for the test button to work properly, others say it should test properly without a neutral attached. I just want to make sure it is working properly.
p.s. thanks to everyone who has posted some great info on this site, it has helped me a lot with this project.
the 120v GFCI's i just installed in my basement less then a week ago need to have power to them to trip. they do nothing if you take them out of the box and start playing with the buttons. older GFCI's i have and see on my jobs will click and reset without power.
seriously consider running 4 prong plugs. that is NEC , or maybe just CT code. either way it is for your safety.
other than your neutral (white) wires, and your 1 (120v) or 2 (240v) hot leads (black and/or red) , you should have a seperate ground wire, (either green sheathing or bare copper) that wire will go from the green stud on your GFCI, and should connect to every metal box your power is running through. that ground wire needs a seperate path all the way back to earth ground at your panel. every metallic thing that your wires travel through needs to be bonded to that green/bare copper wire. (i'm sure you know that, but that might help someone in a search later on)
EDIT:, it appears you do need the 4th wire for that box. look at the link below and read the top box
here's a pic
remember, better to be safe then sorry, it only takes 1/4 of 1 Amp to KILL you. ( that goes through my head every time i hear a transformer buzzing over my head, or i smack my hard hat on a power line. )