14/2 and 18/2
- Thread starter 865resi
- Start date
- Status
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Typically no, esp if your 18/2 is the t stat (bell wire).
What is it you are trying to do so we can find a solution?
What is it you are trying to do so we can find a solution?
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
The 18/2 thermostat cable for the door controls is a class 2 circuit. It is not allowed in the box with the power circuit. There are some exceptions to this for class 2 circuits but they would not apply in this case. In any case I'm not sure why you even want to do this.
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
The control wire for the door would have to have the same temperature rating as the 120V conductor.
James L
Senior Member
- Location
- Kansas Cty, Mo, USA
- Occupation
- Electrician
So it can give a cleaner look than a second box for lovo. It can get rolled up in the back of the box before the 120v, and then it's out of the way of the drywallers using a rotozip.
We used to do it like that all the time here in KC
After being failed a couple of times, I started stubbing next to the outside of the box so the 18/2 could still emerge from behind the receptacle plate. The aforementioned drywall thugs tore it up more times than not.
I started using a separate box a number of years ago. It's just as easy, and certainly more predictable
James L
Senior Member
- Location
- Kansas Cty, Mo, USA
- Occupation
- Electrician
For what it's worth, I always nail on my receptacle box first, then I use the head of my hammer as a spacer to set the lovo box about an inch away
Just a fast and easy way to space them the same every time
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
Bet you waste a lot of hammers leaving them stuck between boxes!
They make a 2 gang box. One side for 120 volt receptacle/ other side for low voltage. May be just as cost effective using two single gangs!
Amps
Electrical Contractor
- Location
- New Jersey
- Occupation
- Electrical, Security, Networks and Everything Else.
Carlon and others make a 2gang box, half is high volts, half low volts.
James L
Senior Member
- Location
- Kansas Cty, Mo, USA
- Occupation
- Electrician
Using a 2 gang Carlon box might seem like a good idea, but I think not. The box is more expensive, for sure
Then, what kind of opening would you create for the lovo side? Then, what kind of plate will you use?
Maybe a duplex + toggle switch plate and run the lovo out the toggle hole? Then the lovo side of the plate is not attached.
Maybe a brushed decora insert and duplex + decora plate? That would add $8.00 or more
Duplex + blank? Add $7.00
Then, what kind of opening would you create for the lovo side? Then, what kind of plate will you use?
Maybe a duplex + toggle switch plate and run the lovo out the toggle hole? Then the lovo side of the plate is not attached.
Maybe a brushed decora insert and duplex + decora plate? That would add $8.00 or more
Duplex + blank? Add $7.00
James L
Senior Member
- Location
- Kansas Cty, Mo, USA
- Occupation
- Electrician
About $7.00
Leviton White 2-Gang 1-Dupex/1-Blank Wall Plate (1-Pack) 002-88008-000 - The Home Depot
Double Gang Combo Blank and Duplex Wall Plate. White Features: Residential grade 2-gang 1-blank device and 1-duplex receptacle combination wall plate Standard size. UL and CSA Standards and Certifications
www.homedepot.com
Amps
Electrical Contractor
- Location
- New Jersey
- Occupation
- Electrical, Security, Networks and Everything Else.
Or this low voltage 1 gang
letgomywago
Senior Member
- Location
- Washington state and Oregon coast
- Occupation
- residential electrician
I just stub it down a couple inches away. I don't want to have opener wire anywhere need the cover. Sometimes I go to the opposite side of the truss. Drywall hangers just poke out and some firecaulk it.
Amps
Electrical Contractor
- Location
- New Jersey
- Occupation
- Electrical, Security, Networks and Everything Else.
I was wrong, this can't be used it's a fire rated ceiling.
- Location
- San Francisco Bay Area, CA, USA
- Occupation
- Electrical Engineer
More importantly, it would need to have the insulation voltage rating to be a minimum of the highest voltage in the box. Insulation voltages generally come in 3 levels for LV wiring: 50V, 300V and 600V. MM-B is 600V, so assuming your garage door is 120V that’s fine, but many low voltage (alarm and signal low) wires are 50V max, so cannot be in the same box. You CAN find 300V and even 600V signal wiring, you just have to look for it.
The other rules about Class 2 circuits would still apply of course.
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
A residential garage ceiling is not fire rated.
- Status