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Old 09-13-2018, 01:41 PM   #1
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New construction wiring. What was the builder thinking


I'm looking at the low voltage pre-wiring for my garage door opener. (The wiring for the safety sensors)

I have 3 garage doors. At two of the doors they have prewired TWO cat5 type cables on ONE side of each door. On the third door there is only 1 cable there.

Why did they put two wires at each of two doors, but only 1 cable at the other door? (Note at the outlet in the ceiling there are only 2 cables for each opener, presumably 1 for the safety and 1 for the push button.)

I was able to wire one of the doors thru trial and error, using 1 of the 2 sensor wires. However I'm now working on the door which includes only 1 cable, and I can't get power to the sensor thru that wire.

Is there any logic to their madness, or did they just mess up?
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Old 09-13-2018, 02:29 PM   #2
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Re: New construction wiring. What was the builder thinking


I can't see how they routed the wires but my guess was they were a tad lazy and intend the two wires to have one go to one door and the other run along the baseboard to the other door next to it. This is assuming that the two wires are routed between the two doors and not all the way on one end or the other. The third, single wire I am guessing is at an end. Even with this methodology you need six wires so I'm not sure how they intend to accomplish this.
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Old 09-13-2018, 03:41 PM   #3
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Re: New construction wiring. What was the builder thinking


Was it just a rough in, or were they supposed to install these door openers? Rough ins not used by closing, can be missing things.

Cheers!
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Old 09-13-2018, 08:48 PM   #4
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Re: New construction wiring. What was the builder thinking


How many individual wires in each Cat 5 cable?
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Old 09-14-2018, 07:31 AM   #5
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Re: New construction wiring. What was the builder thinking


There are like 4 pairs of wires in each cable. Green - Green White, Brown - Brown White, Orange - Orange White, etc.
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Old 09-14-2018, 07:33 AM   #6
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Re: New construction wiring. What was the builder thinking


Quote:
Originally Posted by supers05 View Post
Was it just a rough in, or were they supposed to install these door openers? Rough ins not used by closing, can be missing things.

Cheers!
This is just a rough in. I am installing the openers myself.
The garage has been drywalled so I can't see where the cables are going.

Just can't understand why 2 of the doors need 2 sets of cables. And the door with only 1 cable.... doesn't seem to terminate at the overhead location for THAT door.
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Old 09-16-2018, 12:24 AM   #7
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Re: New construction wiring. What was the builder thinking


Quote:
Originally Posted by edfiero1 View Post
This is just a rough in. I am installing the openers myself.
The garage has been drywalled so I can't see where the cables are going.

Just can't understand why 2 of the doors need 2 sets of cables. And the door with only 1 cable.... doesn't seem to terminate at the overhead location for THAT door.
Depending on the sensor, you'll need 2-4 wires per sensor. Some use a reflector, instead of a double line sensor. That would mean only a single cable to each door, plus another for each keypad outside the door.

Cheers!
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Old 09-16-2018, 07:31 AM   #8
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Re: New construction wiring. What was the builder thinking


You either pay for the job to be completed, or you deal with picking up
where an installer, who couldn't care less, left off.
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Old 09-16-2018, 07:36 AM   #9
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Re: New construction wiring. What was the builder thinking


Quote:
Originally Posted by supers05 View Post
Depending on the sensor, you'll need 2-4 wires per sensor. Some use a reflector, instead of a double line sensor. That would mean only a single cable to each door, plus another for each keypad outside the door.

Cheers!
The key pad outside would be wireless.
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Old 09-16-2018, 08:28 AM   #10
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Re: New construction wiring. What was the builder thinking


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The key pad outside would be wireless.
You guys got nicer products. All the subdivisions here have wired keypads, if you get anything at all. Cheapest stuff they could find.

Cheers!
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Old 09-16-2018, 08:32 AM   #11
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Re: New construction wiring. What was the builder thinking


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Originally Posted by supers05 View Post
You guys got nicer products. All the subdivisions here have wired keypads, if you get anything at all. Cheapest stuff they could find.

Cheers!
So you smash the plastic and cross the wires and your in.
Here they just steel the key pad but they can't get in.
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Old 09-16-2018, 08:33 AM   #12
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Re: New construction wiring. What was the builder thinking


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Originally Posted by Nealtw View Post
So you smash the plastic and cross the wires and your in.
Here they just steel the key pad but they can't get in.
Here they would just drive through the door anyways... Lol. Locks are for honest people.

I didn't say it was secure, i said it was cheap.

Cheers!
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Last edited by supers05; 09-16-2018 at 08:38 AM.
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Old 09-16-2018, 10:59 AM   #13
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Re: New construction wiring. What was the builder thinking


Any I've seen in Eastern Ontario (and that's a lot of them) have all been
battery powered wireless keypads.
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Old 09-16-2018, 11:05 AM   #14
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Re: New construction wiring. What was the builder thinking


Quote:
Originally Posted by CodeMatters View Post
Any I've seen in Eastern Ontario (and that's a lot of them) have all been
battery powered wireless keypads.
It's definitely smarter. The house that I just moved into is wired. I disconnected it inside, as its not needed. But then any universal remote will open it when set to the right frequency.

Cheers!
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Old 09-16-2018, 04:50 PM   #15
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Re: New construction wiring. What was the builder thinking


Are the 3 doors in line with just a small partition between them? If so, you have all the wires you need if the wires are on the outside of the openings. Please post a picture(s)


. [ ] . .[ ]. [ ]. [ = door openings & . = wires

Last edited by georgemcq; 09-16-2018 at 05:01 PM. Reason: more info
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