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wiring help - bathroom fan
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Posted by steveninmaine (My Page) on Thu, Jul 2, 09 at 17:06
| Hey there, new poster with a wiring question. I'm replacing the old exhaust fan in the upstairs bathroom with a new Panasonic fan. I've got a Marktime fan/light time switch. The hot wire is in the ceiling where the fan will go. There are two romex wires that go from the fan to the wall switch. We have had the attic insulated with dense pack cellulose so adding more wires would be very difficult. I had no problem wiring the old fan but this new timed switch is different than wiring to two separate switches. Here is the diagram from the switch:
http://www.mhrhodes.com/images/42_Series_11-05-07.jpg
Can anyone help here?
Thanks,
Steven |
Follow-Up Postings:
RE: wiring help - bathroom fan
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If you only had a fan before you probably don't enough wires to also wire a light.
Tell us all the wires going from the fan to the switch box. Is the a receptacle in the switch box? |
RE: wiring help - bathroom fan
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| The live line goes to the fan in the ceiling. Then there are two pieces of romex going from the fan to the switch. |
RE: wiring help - bathroom fan
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| I couldn't pull up your wiring diagram.I replaced my bathroom exaust fan some years back.I had a GFCI that fed a double-single pole switch which powered my fan and a 5 bank of vanity lights.The new exaust fan had 1-60watt light and a 25-watt night light.To run it I had to add another double-single pole switch.In order to wire it to the switch I had to wire a WHITE(NEUTRAL)as a HOT BLACK WIRE. It's very rare to have to do this but in my situation the CODE allowed it.That means connecting a black(hot) to a (nuetral) white.The original fan was fed from a GFCI.So in order to connect my 2 double-single pole switch's I had to use a WHITE (NEUTRAL) AS A HOT WIRE.I also marked it with a marker and coiled some electrical tape around it to have no doubt that was a live hot wire.I would suggest you contact an electrician if you don't understand the wiring diagram or are unsure how to make the connections.Its always worth the extra money to keep your family safe.When in doubt call an electrician. |
RE: wiring help - bathroom fan
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| I understand the diagram but it only shows how to wire the switch when the supply is at the switch, not when the supply is at the fan. There are enough wires, I just want to get it right. Steven |
RE: wiring help - bathroom fan
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| If you understand the diagram and how to connect the switch or switch's?#1 disconnect the breaker that is feeding that line.#2 get the correct length and gauge of wire to (fish) down to the switch.#3 get a UL approved connection box with the correct box connector's. You will need 2.#4 make sure ALL circuits are disconnected that feed that area-bathroom.#5 fish down your wire to the switch allowing 3" extra for connections.#6 fasten connection box to joist.#7 run the feed and the extension feed through the box connectors.#8 run both the feed and extension feed wires into the connection box.#9 connect both wire feeds and box connectors opposite to each other in the connection box .#10 use the correct wire nuts for the ga wire being used and make the connections.#11 Wire according to your diagram. |
RE: wiring help - bathroom fan
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| I'm making the assumption that the two romex are cables with two wires plus ground in each cable. Also assuming that you had two switches and both these lines are switch loops. If so, I'll continue. One cable must be converted to carry the power to the switch along with a neutral. Connect this cable to the power and neutral line at the fixture and to the black and white at the switch/timer. The second cable, for ease of identification, remark both ends with one wire being red and one being blue. Connect to the blue and red on the switch/timer. Refer to the diagram and connect the other ends to the brass of the fan and light. Connect the neutral to the silver of the fan and light. Stand back and trace the path that the power will take coming from the main circuit box, thru the fixture, to the switch/timer and then to the fan/light. There should be a continuos path from the main panel and back to the main panel. |
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