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A GFCI can not be used on a three wire branch circuit. It has to be on a single two wire circuit.

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Q: 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?
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In which circuit did screwing out one bulb not influence the lighting of the other bulb?

A parallel circuit will not effect the other bulb. If the bulbs are in a series circuit the other bulb will not turn on.


A 32A breaker was controlling a lighting circuit but is now on a 6A breaker which is now buzzing what should you do?

Answer for countries in Europe and other world areas running a 50 Hz supply service.Depending on the load of your lighting circuit. I would measure the current with an inductive amp meter. once you know the current required for your lighting circuit, you then install a circuit breaker which is 15% higher than your load. eg, load is 10A. 10A load + 15 % = 12A breaker (15 A is ok as the breaker is used to protect the wiring and should be rated in consequence of your wiring by 25% less or its current rating, or less, not the load)The humming of your lighting circuit breaker indicates that your breaker is either faulty, or having a difficult time keeping a closed circuit. Or simply that the manufacturer produced a breaker that hums by nature of its construction.


Are power cable armour to be earthed at both ends or at one end only?

One end only. Single point grounding is a rule of thumb. The reason for this is when you run cables together, including a shield or ground cable, the cables with power flowing in them will induce a voltage on the other cables. If two grounds are placed on a shield or ground cable, unwanted current will flow in a loop through the cable.


What is the difference between sheathed and non-sheathed cable?

Cable sheath current is a current induced in the sheath by radio, magnetic or other interference, or a fault condition. The cable sheath should be grounded at one end so that this current flows to ground safely.


What is the purpose of the neutral conductor?

The purpose of neutral conductor is to carry the unbalanced load current. It is also a grounded conductor, which effectively places a limit on how much voltage could be present from hot to ground, a safety concern.

Related questions

Where can you find unusual cable lighting design ideas?

One can find unusual cable lighting design ideas at: Houzz and Home Portfolio. There are also many other home decoration websites that have ideas for both cable and standard lighting.


In which circuit did screwing out one bulb not influence the lighting of the other bulb?

A parallel circuit will not effect the other bulb. If the bulbs are in a series circuit the other bulb will not turn on.


How do i identify negative and positive battery cables on a 1991 ford mustang. there are no red or black markings?

The Negative - Battery Cable will be connected to ground. Ground is the engine block, frame, or other non-electrical part of the vehicle. The other cable is positive. Another way is to connect an ohm meter black test probe to the engine block and touch the red test probe to the cable you think is ground -. If the circuit is complete you have found the negative cable.


Where can one find cable lighting kits online?

You can find cable lighting kits online from eBay and Amazon among other stores. The prices tend to vary from one store to the other. It is therefore important to first perform a comparison.


How long is the main ring?

If you are talking about an electrical ring main it can be as long as you want it as long as it returns back to the circuit breaker with the other end of the cable, which if you didn't return the 2nd end of the cable to the circuit breaker you would have a radial circuit.


Can a cut cable wire cause a fire?

If by 'cable wire' you mean Coax cable for the TV, or Internet, then the answer is no. The power/voltages in the cable are way to low to produce a spark which is usually what triggers flame. If by 'cable wire' you mean a cable carrying an electrical service such as 120V or 240V, then, if the cable is damaged by an accidental or deliberate cut which causes a short circuit from a hot phase wire or wires to other wires in the cable - such as to other hot phase wires in a 3-phase circuit, a neutral or a ground wire - then the resulting heavy current could result in the cable becoming very hot and could cause it to catch on fire unless there was some overcurrent protection device to prevent that from happening. That is why fuses and/or circuit breakers should always be included in any electrical service wiring to cut off the supply of current before a fire can be caused by such damage.


What are 3 type of electrical circuit?

Lighting CircuitsRadial CircuitsRing circuitsRing CircuitsA ring circuit can serve an area up to 110 square metres (120 square yards), 2.5mm2 cable is used to wire the circuit and the circuit has a 30amp fuse or 32amp MCB on the consumer unit. It is usual for a house to have one ring circuit upstairs and one ring circuit downstairs.Ring circuits can have extra sockets added to them by adding a 'spur' onto a ring circuit. A spur is a branch off the ring circuit, usually from an existing circuit, although a junction box could also be used. Theoretically as many spurs as sockets could be added, but the maximum load of the circuit (30/32amp) still exists).Radial CircuitsRadial circuits can therefore only serve a smaller area. Using 2.5mm2 cable combined with a 20amp fuse/MCB an area of 20 square metres (24 square yards) is permissible. For 4mm2 cable combined with a 32amp MCB or a 30amp cartridge fuse (a re-wirable fuse is not allowed) an area of 50 square metres (60 square yards) is permissible.In a similar way to ring circuits spurs can be added at points along the radial circuit if required. High powered appliances (cookers / showers) must have their own radial circuit.Lighting CircuitsLighting circuits are basically radial circuits. There are two distinct types of lighting, circuit the loop-in circuit and the older junction box circuit. Most houses combine aspects of both types of circuits. The loop-in circuit has a cable, running from light to light terminating at the last light as in the conventional radial circuits and then single cable run from the lights to the light switches.The other type of lighting circuit has a junction box for each light. The cable runs from the consumer unit to the first junction box and then onto the next terminating at the last junction box. Then another cable is run from each junction box to its light and another wire from the junction box to that light switch. The cable used for a lighting circuit is 1mm2 or 1.5mm2 for long runs.Another AnswerI think that this question is referring to more fundamental circuits than those described above. There are fourcategories of circuit: series circuits, parallel circuits, a combination of the two (series-parallel circuits), and complex circuits. Complex circuits describe circuits which don't fall into the first three categories.


Which battery cable is positive in a 91 Isuzu Trooper?

Red is positive. If they are both black then the cable that is connected to ground is negative and the other cable is positive.


Were is a good place to ground a car battery?

Grounding a Vehicle BatteryUsually, manufacturers attach the ground cable from the battery to the engine block. I don't change that unless some other factor makes using the manufacturer's ground location impossible, and then I route the ground cable to a manifold bolt within reach of the cable.


How do you replace a mower battery cable?

remove the cable from the battery, follow it to the other end, ground or starter, reverse the same for installing a new one,


Is it safe to use a three pin british plug with one pin missing?

If it is the ground pin that it is missing there will be a safety factor involved as there will be no ground return to the distribution panel should a fault on the circuit occur. If it is any other pin missing the circuit will be open and the circuit will not be energized.


Is the battery in an Sl500 battery positive or negative ground?

Batteries are neither positive nor negative ground. It is the circuit itself that determines the common ground. For example: If I have two circuits, one needing 6vdc negative ground and the other needing 6vdc positive ground, the battery would be installed the same way in both circuits (positive terminal on the battery to the positive connection in the circuit, regardless of whether the circuit is positive or negative ground). The reason for labeling the ground as Positive or Negative has more to do with how the circuit is wired up, than the actual voltage source. The explanation for that is beyond the scope of this answer.