new install directions for Nutone 763RLN combo light/fan unit


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Old 04-06-14, 11:27 AM
J
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new install directions for Nutone 763RLN combo light/fan unit

complicated issues. 1st switch @ entrance to bath operates lite bar over sink AND single lite over toilet. Have installed fan/light at toilet location. Can I run power (line in) from J box in attic to new single switch ( to run both fan & light over toilet)? Does this run require two (2) wire runs? one from j box to switch and then one back to Nutone unit? All wire 12/2. Also what is connection diagram inside Nutone unit -has 1 black, 1 blue, 2 white, 1 ground/green. Would really appreciate concise directions here. Thanks JW
 
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Old 04-06-14, 12:52 PM
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Welcome to the forums.

You don't need to use 12-2 unless that's what the existing circuit is.

Right now you have one switch controlling two lights. You will be removing the over toilet light and adding a fan/light combo. You have an existing cable that probably comes from the light bar which is of no help. That will have to be routed into your new junction box and then capped off.

There are many ways to wire it. You can bring power to the fan/light and then a cable to the new switch but usually the junction boxes are too small. The easiest way is to pick up power, go down to the switch and then to your fan/light combo. I like to run a piece of three wire between the switch box and the fan in case a dual switch is desired in the future.

In the fan.....
You'll be connecting the two white wires together for neutral.
The black and blue wires get connected together and then to the black or hot of your new cable.
 
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Old 04-06-14, 12:54 PM
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Best way power to switch. 12-3 to new fixture. 12-3 white to fixture white, fixture black to 12-3 black. Fixture blue to 12-3 red.

If you bring power to the fixture first you will need to use 12-4 for the switch loop to meet 2011 NEC requirements.
 
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Old 04-06-14, 01:54 PM
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Thanks RAy & PJmax

OK got sequence for combo unit. Appreciate 12/3 option but will use 12/2 existing and in doing so will power line in to switch box (1st)& run (2nd)line in to combo unit. Question regarding switch wire diagram? blacks together & whites together w/ pig tails to switch? Right correct me?thanks JW
 
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Old 04-06-14, 02:24 PM
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At your switch you will connect the whites together and the blacks go to the switch.
 
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Old 04-06-14, 02:26 PM
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blacks together & whites together w/ pig tails to switch?
If the whites are neutrals they would not go to switch. Is ttis two switch loops to one switch?
 
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Old 04-06-14, 04:13 PM
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complicated issues.
Incomplete description.

Where does the power from your panel come into this system? Does it come to the box in the attic first?
1st switch @ entrance to bath operates lite bar over sink AND single lite over toilet.
Is there a box there with more than one switch in it? Whether that's so or not, tell us what cables enter that box and how each wire in each of those cables is terminated or spliced. Do the cables that feed your vanity light and the single light over the toilet come from the box in the attic or the switch box?

Can I run power (line in) from J box in attic to new single switch ( to run both fan & light over toilet)? Does this run require two (2) wire runs? one from j box to switch and then one back to Nutone unit?
This depends on how the system is wired now.

All wire 12/2.
That's "all cable." #12AWG conductors must be used on a 20A circuit. #14AWG conductors may be used on a 15A circuit. What size is the breaker that protects this circuit?

Also what is connection diagram inside Nutone unit -has 1 black, 1 blue, 2 white, 1 ground/green.
One grounded conductor (neutral wire) to both white wires in the unit. One switched ungrounded conductor (hot wire) to the black wire in the unit and a second switched ungrounded conductor (hot wire) to the blue wire in the unit.

Would really appreciate concise directions here.
Concise enough?
 
 

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