So I know this guy...

Joined
May 1, 2019
Messages
2,215
Reaction score
3,504
Location
Reno, NV
who, foolishly, ran shielded 22/2 wire through his house! He was unaware that he was suppose to use unshielded 22/2. He may have to re-pull with the correct wire as there is still time for it. Curious. What does happen if you use shielded wire for door/window contacts? The box I ... I mean he ... used does say alarm signal cable and it's not red (I believe fire alarm cable has to be shielded).
 

Old Timer

Known around here
Joined
Jul 20, 2018
Messages
1,352
Reaction score
2,945
Location
I'm ok
I installed an alarm in a house that used telephone cable to all of the windows and motion sensors. It has worked well for over 10 years.
Also used a cat 5 cable for the keypad. He was retired from telephone company.

Shielded cable will not hurt, but doubt it is needed.
 

TonyR

IPCT Contributor
Joined
Jul 15, 2014
Messages
16,438
Reaction score
38,154
Location
Alabama
I'd likely use it, being careful to ground only one end of the shield (not both) to earth ground. I'll wager it'll work just fine.
 

sebastiantombs

Known around here
Joined
Dec 28, 2019
Messages
11,511
Reaction score
27,690
Location
New Jersey
Depending on the RF environment, say a local radio station nearby, not grounding one end will create a bunch of nice antennas that will have some interesting voltage levels on them. I don't think it would be a problem for an alarm system, simple DC circuit, but one never knows.
 
Top