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I am trying to wire a light and exhaust fan to an occ

Customer Question
sensors with a GFCI. JA: Sometimes...
I am trying to wire a light and exhaust fan to an occ sensors with a GFCI.
JA: Sometimes electrical issues that that you think will be really complicated end up being easy to fix. The Electrician I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so we can help you best.
Customer: Original set up was a 3 gang box. Switch for the light, switch for the fan, and a GFCI. I want to connect the light and fan to a 2 load occ sensor. I will end up with 2 devices (Occ sensor and GFCI) in the box.
JA: Is there anything else important you think the Electrician should know?
Customer: Not sure, hopefully he can ask specifics if he needs to know more.
JA: OK. Got it. I'm sending you to a secure page on JustAnswer where you can place your fully refundable $5 deposit (plus $13 after the Electrician responds). While you're filling out that form, I'll tell the Electrician about your situation and connect you two.
Submitted: 1 year ago.Category: Electrical
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Answered in 3 minutes by:
3/6/2016
Electrician: Jason, Service Technician replied 1 year ago
Jason
Jason, Service Technician
Category: Electrical
Satisfied Customers: 4,287
Experience: Over 20 years of experience in all types of installations, troubleshooting, and repairs.
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Hello. Welcome to Just Answer.

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Electrician: Jason, Service Technician replied 1 year ago

Are you able to post photos of the box, with all wires shown?

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Customer reply replied 1 year ago
Thank you
Electrician: Jason, Service Technician replied 1 year ago

You are most welcome. If I can see the wires in the box, it will likely help greatly in getting everything properly connected.

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Customer reply replied 1 year ago
I will take them now.
Electrician: Jason, Service Technician replied 1 year ago

Great. I'll stand by.

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Customer reply replied 1 year ago
This is the occ sensor I am wiring up. I want both the exhaust fan and light to turn on when someone enters the bathroom and to turn off automatically if someone leaves them on.
Electrician: Jason, Service Technician replied 1 year ago

Thank you for posting the photos. It appears there are 3 sets of wires coming into the wall box. Can you confirm this for me?

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Customer reply replied 1 year ago
there is the line coming in from the panel, then a line out to the fan, and a line out to the light. Previously there were three devices, light switch, fan switch, and GFCI.
Electrician: Jason, Service Technician replied 1 year ago

Thank you for the additional information. It sounds like you've identified each set in the box. If so, please proceed as follows...

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Electrician: Jason, Service Technician replied 1 year ago

The black wire from the panel will feed both devices. So, you need to connect it to each device. It goes to the black or gold screw on the GFI outlet's "LINE" terminals. All 3 white wires splice to each other, and there will be a short piece of white wire from that splice to the silver screw on the GFI outlet's "LINE" terminals. To get constant power into the other device, connect its black lead to the same hot screw on the GFI outlet as the black wire coming from the panel.

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Electrician: Jason, Service Technician replied 1 year ago

That is, assuming the black lead from the occupancy sensor is marked "LINE".

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Electrician: Jason, Service Technician replied 1 year ago

That info isn't shown in the Hubbell device brochure you posted here.

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Electrician: Jason, Service Technician replied 1 year ago

I just found the Hubbell wiring diagram Online, and black IS the hot feed into the device.

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Electrician: Jason, Service Technician replied 1 year ago

Please let me know when you've completed the suggested steps. When you have, there should be two black wires left in the wall box.

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Customer reply replied 1 year ago
OK, so I connect the black wire from the panel to the GFCIs line terminal. Then I have two more blacks, one that runs to the fan and one that runs to the light. What I have read so far is that I am not connecting those yet. Just connect the occ sensors black wire to the same terminal on the GFCI as the line from the panel. So the blacks running to the fan and light are not connected yet, correct?
Electrician: Jason, Service Technician replied 1 year ago

Yes, that's correct.

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Electrician: Jason, Service Technician replied 1 year ago

When you have it connected as described, the black wires from the fan and light will be open (not connected to anything), as will the red and blue wires on the sensor. At that point, you can connect the red from the sensor to one open black, and connect the blue from the sensor to the other open black.

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Customer reply replied 1 year ago
OK, I have all the whites nutted together with a lead running to the GFCI. I have the black from the panel and the black from the occ sensor connected to the same terminal on the GFCI. I connected the black to the fan to the blue wire on the sensor and the light to the red.
Electrician: Jason, Service Technician replied 1 year ago

That sounds correct. If you haven't already done so, I would go ahead and turn the breaker on and test operation of the GFI outlet and the sensor.

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Customer reply replied 1 year ago
ok, GFCI, Light, and fan are all on.
Customer reply replied 1 year ago
Manual override on the occ sensor seems to work for the light, but not the fan.
Electrician: Jason, Service Technician replied 1 year ago

Hmm. Is it possible the sensor was damaged by a previous connection that wasn't quite right? One thing you could check is to make sure all white wires are secure in the bundled splice.

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Customer reply replied 1 year ago
OK, may be the ground. Just noticed the ground to the fan is not connected and the instructions say a ground is required for proper operation. I will try that.
Electrician: Jason, Service Technician replied 1 year ago

OK. I have seen this in the past, where electronic occupancy sensors won't work without a ground wire properly connected.

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Electrician: Jason, Service Technician replied 1 year ago

I need to sign off now to attend church. I will check for your reply when I return. Thank you.

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Jason
Jason
Jason, Service Technician
Category: Electrical
Satisfied Customers: 4,287
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