I am installling a water heater, 220v, to a timer box.
Need to determine which of the three identical cable is ground and the other two hot wires, using a multitester, since they look igual.
Need to find the ground before getting the eletricity on otherwise if I dot not selected the right combination I will get a short circuit.
2007-08-31 13:46:32 · 5 answers · asked by Anonymous in Home & Garden ➔ Do It Yourself (DIY)
Your multi-tester will have a resistance function,
(Ohms scale).
Test one lead to cable, one lead to ground,
(There will be a metallic box or bare ground
wire if the installation is correct to code), for
each of your cables.
The one that shows no resistance will be
the neutral. - Mark it with white tape.
2007-08-31 14:22:03 · answer #1 · answered by Irv S 7 · 0⤊ 1⤋
Considering your poor spelling and grammar, I recommend you hire someone who knows what they are doing. If you have to ask such a menial question you really shouldn't have your fingers inside the electrical enclosure.
The ground wire is typically green or bare copper. Turn off the breaker in the main panel and use the multimeter to measure resistance from each conductor to the enclosure case. One should appear as a short circuit and the other two as open circuit.
2007-08-31 20:59:09 · answer #2 · answered by Warren914 6 · 1⤊ 0⤋
If you dont know how to identify the ground you should really get an electrician to wire it correctly and install the timer box. No disrespect but electricity is dangerous and you shouldn't be on the inside the cover of a panel box.
2007-09-01 13:09:23 · answer #3 · answered by petethen2 4 · 0⤊ 0⤋
What kind of wiring are you using ? If your using 10-2 romex you should have one copper(bare) wire a white and a black one you copper/green is always ground and if in romex is wrapped in brown paper. The same if your using MC. Now if you already did this and your checking it with your meter check and see if your ground and neutral wires are in the same grounding strip if they are simply check for continuity
2007-08-31 22:42:57 · answer #4 · answered by PENATRATOR 2 · 0⤊ 0⤋
You will have two "hot wires" and one ground or neutral. Put one tester lead on one wire and the other on a known ground (metal conduit or even an extention cord pluged into a grounded outlet) A hot wire will show current, and ground or neutral will not.
2007-08-31 20:59:54 · answer #5 · answered by diver0604 3 · 0⤊ 2⤋