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Circuit Installation How does one install a circuit breaker?

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The process contain a certain degree of risk, but if you follow all safety steps, you should be just fine. Most standard electric panels have a main disconnect switch or breaker at the top of the panel or load center. It is a code requirement. If the load center doesn't have one, then look for the main disconnect at a different location possibly near the electric meter. Turn it off. You better have a flashlight handy or a caving or miner's helmet, because you are going to need a light source. Circuit breakers plug into the load center. The electricity flows into each breaker via a large metal strip inside the panel or load center. It is called a bus bar. This strip is HIGHLY dangerous. Touch this strip while it is energized and you will very likely die. If a screwdriver you are holding slips and touches it, expect nearly the same result. Keep in mind that even though the main breaker may be off, the bus bar may be energized for any number of reasons! Also, the wires leading into the top of the main disconnect are always energized and represent a life safety hazard. In other words, the inside of an electric panel or load center is ALWAYS a dangerous place to be. The black wire to a circuit attaches to one end of a standard or AFCI breaker. The location is almost always a hole that is drilled through a threaded cylinder. A screw twists into this cylinder and tightly clamps down the wire. When installing a new breaker, I always find it easier to attach the circuit wire to the breaker before I plug the breaker into the panel. When removing a breaker, I usually unplug the breaker from the bus bar and then remove the circuit wire from the end of the breaker. Make sure the breaker is in the off position. The end of the breaker where the circuit wire attaches almost always has a small notch in it. This notch fits under or slides into a metal tab strip that runs parallel with the bus bar. This is what stabilizes the breaker. Without this secondary attachment, the breakers would flap in the panel much like a sail that is not tied down to the mast or the side of a boat. Tip the end of the breaker so the notch slides into the metal tab. You then align the breaker with the bus bar and push it down onto the bar. The tension tabs on the breaker open slightly and grip the bus bar as the breaker seats itself. If you feel the breaker seated itself correctly, simply turn it on. All should be well. Remember to follow the instructions that come with the breaker. Always follow the sequence the manufacturer suggests. AFCI breakers require one additional step. You need to locate the white wire that is paired with the black wire in that circuit. The white wire actually attaches to the breaker as well. There is a coiled white wire that leads out of the breaker. This white wire attaches to the neutral bus bar in spot that is vacated when you disconnect the white wire of the circuit. If this answer scared you, call an electrician!

Posted on Aug 27, 2008

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Tempra 24 installation. No hot water. No power led on fron cover. Is the led supposed to be on all the time or just when water is ran?


First, check the circuit breaker. Also, did you upgrade to heavier wiring and a double 60 circuit breaker when you had this installed?

Aug 15, 2014 | Stiebel Eltron TEMPRA 24 Tankless Water...

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How to replace a Bryant GFCB120 Circuit Breaker


If you have a Bryant load center, you can use other breakers in it, including the Eaton GFCB120 GFI since several companies unified their design. The GFI (ground fault interrupter) or GFCI (ground fault circuit interrupter), same thing, may be required for a device you are installing, such as bathroom, kitchen or outdoor fixtures.
The Eaton series includes very clear installation instructions, but if your problem is that they are missing, then all you do is install the breaker in a open slot in the breaker panel, but you have to attach the neutral [white] wire differently. On regular breakers, the neutral goes right to the ground lug in the panel. With a GFI breaker, it goes through the breaker, and then is connected to the ground lug.

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QO115GFI breaker trips when I switch on the breaker next to it.


I happen to have one of these in the box, so I've reviewed the installation & on-line literature for this model. Let's address installation notes:
Don't connect more than 250 ft of load conductor for the total one-way run, to prevent nuisance tripping.
The breaker is to be used on grounded power supply circuits only. We're talking a properly-grounded breaker box, not just the protected circuit.
Look at the side of the breaker. You will notice that the curly white wire is meant to be connected to the (properly grounded) neutral bar in your panel.
The circuit neutral that you're protecting should be landed on the terminal just above that curly wire. Make sure you have the right neutral!
The circuit's hot wire would of course be landed on the topmost screw.
You did not state what you mean by "the breaker next to it": just above, just below, or directly across from the GFI breaker?
I suspect that you meant just above or below the GFI breaker. And I assume you've swapped out other breakers to rule out a defective breaker.
Now, it is possible that you have a "shared neutral" situation. It's a common wiring practice to use one neutral wire for two "hots", where one circuit is fed from the phase A side and the other is fed from the phase B side, (which you'll have in a two-pole, 220V breaker), picking up a 110 volts from each phase. The two 110v "Hots" share a single neutral wire between them to carry return current. The phase shift between the two phases allows this.
However, to avoid nuisance tripping of your GFI, your protected circuit cannot share neutrals with another circuit, as the "other" circuit's operation will cause the 6 milliamp differential between current out (hot) and current return (neutral) which the GFI by design senses and trips.
Your GFI-protected circuit probably needs its own dedicated neutral!
I'd like to hear what you find. Good luck!

Feb 24, 2012 | Square D QO115GFI QO Circuit Breaker

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What GFI breaker is compatible with a Challenger Breaker Box


The National Electrical Code prohibits the use of mixing circuit breaker manufacturers and circuit breaker panels by requiring all electrical equipment to be certified (UL Listed, FM, etc.). Challenger breakers are UL listed, as are Challenger panels. All the circuit breakers installed must be made by Challenger and must be approved for use in that particular panel (more on this below). Installing a different brand breaker into the panel causes the panel and the breaker to lose the UL / FM listing. The lack of a listing causes the electrical code violation. Should a fire occur, and the source is determined to be the use of a mixed manufacturer panel / circuit breaker installation, you insurance company may balk at paying a claim.

If you are unsure of the circuit breakers that are approved for use in your panel, look on the inside cover of the door. On it should be listed the manufacturer's name and all the devices that that the panel will accept. Deviating from the list will trigger the loss of listing.

A final thought: Most GFI breakers are much more expensive than a GFCI outlet. Install a standard non-GFI Challenger breaker and feed a new outlet (next to the panel) with a GFCI plug via the LINE terminals. Connect the rest of the old circuit to the outlet's LOAD terminals. The portion of the circuit that is connected to the LOAD terminals are now GFCI protected. Overloads will trip the circuit breaker as usual, but ground fault issues will trip at the outlet instead.

I hope this helps and good luck! Please rate my reply. thanks.

May 11, 2011 | Challenger Circuit Breaker

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Need a circuit breaker


It looks like you've determined that your problem is the circuit breaker. If it keeps popping out and will not set in the "in" position you will need to replace it. You need to check for dead shorts in the wiring, which I assume you have done. Some local electronics stores may have the breaker you are looking for. The manufacturer Pride sells the part to dealers and local service centers. On line, the circuit breaker for this model is available from MonsterScooterParts.com. To replace the breaker remove the electronics panel, unscrew the nut holding the breaker in the panel and disconnect the 2 wires on the breaker. There is no polarity on installation of the wires. Hope this helps.

Nov 13, 2010 | Jet 3 Ultra Power Chair

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I installed the above gfci with the pigtail side adjacent to the neutral bar, contrary to intructions. The gfci trips immediately when power is turned on the gfci is switched on. What could be wrong and...


1. Did you connect the neutral wire (white) from the breaker to the neutral bar?
2. Did you connect the circuit neutral wire (white) to the circuit breaker. If there is a neutral load the load MUST be connected to the breaker no to the panel neutral bar.
3. If this is a 50A load, what is the appliance connected to the circuit? If it is a range, quite often the newer ranges have a ground wire connected to the burner mount. A small current leakage in the element can trip the GFCI. Check each element (with power off) from the wiring terminals to ground with an ohm meter.

Oct 22, 2010 | Siemens 50 Amp Ground Fault Circuit...

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I need to buy a 20/20 Amp Bulldog breaker for a dryer and any installation tipes


Most electrical dryers are 220 volt. They usually require at least a two pole 30 amp circuit with #10 wire. The breakers you need can be found at most hardware and buidling type stores, Ace , Home depot, Lowes.
Yes they would have the 20/20 breaker also.

Please Vote !!

Apr 24, 2010 | Bulldog Pushmatic 31115 P115 15 Amp...

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