I have 3 receptacles in my garage. One is a GFCI which protects all 3 outlets. I want to connect a new receptacle off the third receptacle (end of run) on other side of wall, and have it protected by GFCI. I connected black to black and white to white. But when I reset the GFCI, it won't hold/reset. When I disconnect the new receptacle, the GFCI holds. I made sure black was attached to brass side, and white is attached to silver side. What am I doing wrong?
Electrical – Why is the GFCI receptacle tripping when I add another receptacle to the circuit
electricalgfciwiring
Related Solutions
Understand the circuit
A standard duplex receptacle functions as both a receptacle, and as a junction. It allows you to connect cord-and-plug devices to the circuit, while at the same time allowing other hardwired devices to be connected to the circuit. Ground-fault circuit interrupter (GFCI) receptacles are similar, however, they offer ground-fault protection to all connected devices. To offer this protection, GFCI receptacles have two specific sides.
Line VS. Load
The Line side of a GFCI receptacle is where the feed line connects, to supply power to the device. The Load side of a GFCI receptacle is used to feed other devices, while offering them GFCI protection.
Find the line
Before you can figure out how to connect the device, you have to determine where the power is coming from, and where it's going to. To do this, you'll need a non-contact voltage detector, and a few twist-on wire connectors.
- Turn off the circuit using the circuit breaker or fuse.
- Verify the power is off using a non-contact voltage detector.
- Remove all the wires from the receptacle, and place a twist-on wire connector on each wire individually.
- Turn the power back on at the breaker/fuse.
- Carefully, move the non-contact voltage detector near each wire.
- When the meter lights up, mark the wire in some way.
- Turn off the breaker/fuse again.
In this procedure, only one wire should make the meter light up. If more than one wire caused the meter to light, contact a local licensed Electrician.
Now that you've located the ungrounded (hot) Line conductor, you'll have to also locate the Line grounded (neutral) conductor. To do this, simply follow the wire you marked in the previous step back to where it enters the box. You should notice that the wire is grouped with one to two other wires. The wire you found to be hot should be black, and it should be grouped with a white, and possibly uninsulated or green wire. These wires make up the Line feeder.
Hook it up
GFCI protection to downstream devices
- Connect the black wire from the Line feeder to the brass screw terminal on the Line side of the GFCI receptacle (The receptacle should be clearly labeled LINE), the white wire from the Line feeder to the silver screw terminal on the Line side of the receptacle.
- Next connect the black wire from the other group of wires to the brass screw terminal on the Load side of the GFCI receptacle, and the white wire to the silver screw terminal on the Load side of the GFCI receptacle.
- Connect all the uninsulated/green wires together with an extra bit of uninsulated/green wire (about 6" long), using a twist-on wire connector or crimp connector.
- Connect the other end of the extra bit of wire to the green (ground) screw terminal on the GFCI receptacle.
Once you restore the power to the circuit, all the devices downstream (on the Load side) from the GFCI receptacle will be GFCI protected. If this is not the desired outcome, please follow the steps below.
No GFCI protection to downstream device
- Connect the black Line feeder to the other black wire and an extra bit of black wire (about 6" long), using a twist-on wire connector.
- Connect the other end of the extra bit of wire to the brass screw terminal on the Line side of the GFCI receptacle.
- Connect the white Line feeder to the other white wire and an extra bit of white wire (about 6" long), using a twist-on wire connector.
- Connect the other end of the extra bit of wire to the silver screw terminal on the Line side of the GFCI receptacle.
- Connect all the uninsulated/green wires together with an extra bit of uninsulated/green wire (about 6" long), using a twist-on wire connector or crimp connector.
- Connect the other end of the extra bit of wire to the green (ground) screw terminal on the GFCI receptacle.
- Leave the sticker covering the Load side terminals of the GFCI receptacle.
WARNING: If you lack the tools, knowledge, and/or confidence to complete this task, please do not hesitate to contact a local licensed Electrician.
If I read your original question correct you said that "the outlets are not getting any juice" but you confuse me with your later statement about the LOAD side still having the tape on, this would suggest that there is no connection to other receptacles on the load side. Can you clarify that please?
If I may suggest that you make sure your wires are stripped the proper length and fixed to the line side of the GFCI receptacle using the side screws and not the push-in holes, I have experienced poor results with the latter method making a good contact just plugging them in. also it is a good idea to make sure the breaker for the circuit is off when making the connections.
If the problem persists you may want to get an professional on the scene, at $25 a pop for the outlets you could save yourself a head ache and get it done in one go.
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Best Answer
Look for a ground fault
With the wiring disconnected, you should not get a reading on the multimeter. If you do, it means you have a short-circuit between that set of wires. Repeat this process on the new receptacle, touching one probe to the green ground terminal and the other to each the brass and silver terminals. Again, no combination should give a reading.
Your circuit is too long?
It may be possible that the circuit is just too long, and the resistance in the conductors themselves are causing the imbalance. Try connecting the new receptacle to the previous receptacle temporarily, using short pigtails (CAUTION: Working on energized circuits is dangerous.). Turn on the power, and try to set the GFCI. Make sure nobody is near the exposed receptacles, and don't touch, or get near them while the power is on.
If the GFCI holds, there is a fault in the wiring to the new receptacle or the circuit may simply be too long.
Warning: I haven't done any calculations, research, or testing on this theory, so it could be completely false. It's just a thought, but it's fairly easy for you to test.
According to the documentation for the Two-Pole QO®/QOB Circuit Breaker and Ground Fault Circuit Interrupter
Is the power on?
GFCI receptacles can only be reset when the power is on. So if you're trying to reset it with the power off, you won't have any luck.