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Yes, you install a GFCI on a 2 wire circuit.
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∙ 12y ago
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How do you wire a GFCI if there are 2 black wires?
You will have to run new electrical wire or a single ground wire back to the panel (though the former is highly recommended). A GFCI outlet will cut off the circuit if it senses voltage leaking to ground. If there is no ground wire, it will not function.
What size circuit breaker for GFCI circuit in a normal size bath?
Normally it is a 20 amp using AWG 12/2 gauge wire. But it really depends on what size wire is on that circuit. If it is white AWG 14 gauge then use a 15 amp breaker. If it is yellow AWG 12 gauge then use a 20 amp breaker.
May a GFCI receptacle be installed as a receptacle in an old installation where the 2-wire circuit has no equipment grounding conductor?
Actually, yes. The GFCI does not need any ground; it measures "leakage", i.e., an imbalance, regardless of whether there is "ground". The National Electrical Code permits installing a GFCI to replace a completely ungrounded receptacle. Others have said: No. The GFCI is designed to measure an unintended path to ground. Without a good ground reference this is not possible.
Is it safe to go from 12-3 wire to a 14-2 wire in the middle of a switch leg?
No. The wire size is dependent on the circuit protection. If the circuit uses a 20 amp breaker you need to run 12 AWG wire on all devices connected to that circuit.
What is the size of wire gauge door?
The power to the garage door opener should be supplied by AWG 12/2 wire on a 20 amp breaker protected by a GFCI. The wire going to the sensors on each side of the door can be door bell wire.
Can one use 1 circuit of a 3 wire plus ground 2 circuit cable as a GFI circuit with the other as a lighting circuit?
A GFCI can not be used on a three wire branch circuit. It has to be on a single two wire circuit.
GFCI outlet outside this line feeds your two bathrooms can you install gfci outlets in these 2 bathrooms?
Yes. You can wire more than one gfci to a circut.
How many ground fault circuit GFCI circuit breakers are there in the circuit breaker panel of the secondary distribution center?
2
How do you install a new circuit for an outdoor outlet?
You will need an electrician. Tim is probably right in that unless you are knowledgable, call an electrican. Saying that, if you are knowledgable, you must install a GFCI circuit outdoors. This can be tied into an existing circuit if that circuit has no more than 9 existing lights & plugs already connected. Use 12/2 with ground wiring.
How do you wire a GFCI if there are 2 black wires?
You will have to run new electrical wire or a single ground wire back to the panel (though the former is highly recommended). A GFCI outlet will cut off the circuit if it senses voltage leaking to ground. If there is no ground wire, it will not function.
Is it possible to use a GFCI outlet in place of an older two-wire outlet?
Answer for USA, Canada and countries running a 60 Hz supply service.Your question is, "Is it possible?" And yes, it is. It would work just fine as a 2 wire outlet. It will even provide GFCI protection, contrary to what many people believe.However, it is a violation of code and highly ill advised to do so. Code requires that when replacing any 2 wire outlet that it be upgraded to a 3 wire circuit. I know hardware stores still sell 2 wire outlets but that is beside the point. The third wire, the ground wire, is there for your protection, or it should be installed. There is no way to properly install a 3 wire outlet, GFCI or not, on a 2 wire circuit.The national Electric Code allows the replacement of two wire receptacles with three wire GFCI outlets refer to NEC section 406.4 for more clarity on the subject.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
How do you wire a 120 volt gfci into a 240 volt three wire?
You can't. The 120 volt GFCI is probably just a 2-wire (hot, neutral and ground) You would have to run a new 3-wire (2 hots, neutral and ground). The two hots are how you get the 240 volts (120+120=240). Also you must make sure the wire is gauged properly. #10 wire for 30 amps, #12 wire for 20 amps, etc.
What size circuit breaker for GFCI circuit in a normal size bath?
Normally it is a 20 amp using AWG 12/2 gauge wire. But it really depends on what size wire is on that circuit. If it is white AWG 14 gauge then use a 15 amp breaker. If it is yellow AWG 12 gauge then use a 20 amp breaker.
How many ground fault interrupter GFCI circuit breakers are there in the circuit breaker panel of the secondary distribution center?
2
Can you wire a 120 volt 7 amp Jacuzzi motor to a wall outlet in my bathroom?
No, it must be on a dedicated circuit of it's own. It must be on AWG 12/2 wire with 20 amp breaker. It also must be protected with a GFCI outlet.
When installing a new 15A GFCI circuit for a whirpool bath what size ground in addition to 12-2 wire is required?
It should be on a 20 amp breaker with #12 THHN wire. The grounding wire is typically permitted to be one size smaller, so #14 AWG bare or green wire for ground.
Should you use 14-2 or 12-2 for garage outlets and lights in Richfield mn?
The only determining factor is the size of the circuit breaker that you will be using. If the garage circuit will be protected with a 15 Amp breaker, you may use a 14 AWG wire. If the circuit will be protected with a 20 amp breaker, you must use a 12 AWG wire. Note too that garage outlets should be protected with a GFCI breaker or outlet. If you have any concerns regarding your ability to adequately design and install the garage outlets, please, for your own safety, contact a local electrician.
