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Answer for USA, Canada and countries running a 60 Hertz supply service.I want to add an exhaust fan to the existing light switch, it's already on a 20 amp circuit, it's only got 1 light and 2 receptacles on it. However, I popped the cover off the switch today to find that the switch is not wired normally, with the 2 white leads tied together behind the switch, and the black leads going through the switch. Instead I have only 1 black lead, and 1 white lead in the box. The white then leads back to the black lead on the existing light.

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With just the two wires in the switch box, it means that the junction you will have to tie into is in the light fixture junction box. The usual wiring in this type of connection is, the circuit "hot" is connected to the white wire that goes down to the switch box and connects to the top of the switch. Code states that this wire should be identified as a "hot" conductor by having a black tape identifier on it. The voltage returns back to the fixture on the black wire from the bottom terminal on the switch. To tie a fan into this circuit it has to be paralleled to the light fixture at the light fixture junction box. Connect the fan feeder's white wire to the neutral (white wire) in the light fixture junction box. Connect the fan feeder's black wire to the black wire that returns from the switch and parallel it to the wire that is now connected to the light fixture. This will give you a connection that will turn on the light fixture and the new fan, from the same switch.

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 REALLY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

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Q: How do you wire an exhaust fan to an end of circuit switch?
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What are the four features required to construct a working simple circuit?

power source, wire, switch, end fixture. Simplest circuit would be a power source and a heating element. No wire or switch needed.


How do you light a light bulb with a six volt battery?

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I have Two black wires and one red wire conected to a switch. Which is hot and which is neutral?

It sounds like your switch is a three way switch. The wire that is on the different colour screw of the three screws will either be the "hot" wire or the wire to the load. The neutral might or might not be in the box that the switch is in depending on which end of the three way system you are at. See discuss question button below.No wires connected to a switch are neutral. A switch breaks the circuit of the hot wire. Black AND red are hot wires. White is used for neutral and is almost never connected to a switch.


How does short circuit occur?

short circuit occurs when two wire which consist of one live and neutral wire are in contact with the main and the other end of the wire are touched each other short circuit occurs


How do you pull 1 of 6 lights off a 3-way switch and add a single switch for that 1 fixture?

One 1,000 watt light will push a typical circuit breaker close to its limit. Six such lights will require wiring and circuit breakers to handle the load. Figure one circuit breaker per light. That means not only six switches but six switches, each on a different circuit breaker. Don't overload the wiring or it could cause a fire.

Related questions

What are the four features required to construct a working simple circuit?

power source, wire, switch, end fixture. Simplest circuit would be a power source and a heating element. No wire or switch needed.


What are all the parts on a circuit board?

to assemble a circuit you just need to connect one end of a wire to the battery and the other to the light bulb ( could be another electrical device) now take an other wire and connect on end of it to the other side of the battery and the other to the other side of the light bulb( or an other electrical device. if your circuit is including a switch this is how you do it: ( you will need three wires for this circuit if you have one electrical device) connect one end of the wire to the battery and the other to the switch.Grab another wire and attach one end of it on the other side of the switch and the other to the electrical device (light bulb). Grab another wire and attach one end of it to the other side of battery and the other to the other side of your electrical device. And there you have it how to assemble a circuit


How do you light a light bulb with a six volt battery?

You'll need two pieces of wire... and im pretty sure that if you take one end of the wire and put it on the very bottom of the light bulb and the other end of the wire and put it on the positive side of the battery, and take the other wire and put it on the threads of the light bulb and the other end of the wire and put that end on the negative side of the battery, you should get light. (I may have the polarities [positive &amp; negative] mixed up).


I have Two black wires and one red wire conected to a switch. Which is hot and which is neutral?

It sounds like your switch is a three way switch. The wire that is on the different colour screw of the three screws will either be the "hot" wire or the wire to the load. The neutral might or might not be in the box that the switch is in depending on which end of the three way system you are at. See discuss question button below.No wires connected to a switch are neutral. A switch breaks the circuit of the hot wire. Black AND red are hot wires. White is used for neutral and is almost never connected to a switch.


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If you tie piece of copper wire a end of a exhaust.. what will happen?

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How do you wire a light to a switch at the end of a run and which controls an outlet?

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How do you pull 1 of 6 lights off a 3-way switch and add a single switch for that 1 fixture?

One 1,000 watt light will push a typical circuit breaker close to its limit. Six such lights will require wiring and circuit breakers to handle the load. Figure one circuit breaker per light. That means not only six switches but six switches, each on a different circuit breaker. Don't overload the wiring or it could cause a fire.


How do you wire multiple lights starting at the lights first switch last and a power drop behind?

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How do you switch poles in electromagnetic field?

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How do you wire a switch outlet combo circuit to an existing 3 way light switch?

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