Low voltage in the electrical world is less than 600 Volts.
Legally (code wise) you can run 12VDC and 120 VAC in the same conduit as long as the wires / jackets are rated at 300 Volts.
I do not do this with my low voltage (alarm, 12VDC wires - DC wires) and AC voltage 120VAC wires. I did though run 16/4 cabling for speakers near some AC conduit with no ill effects (no noise on speakers).
Today I do run LV (for alarm, 12VDC, speaker wire) along outside of metal electrical conduit in the basement in certain areas. Never have had a problem with this.
IE: thermostat wall has a 120VAC switch in the same cavity (16"). In the wall is the doorbell wires, conduit for switch an conduit for thermostat. I ran the LV thermostat wires in the same conduit as the thermostat to HVAC unit with no issues and a POE cat5e cable in the same cavity.
All of my GDO LV wires are / were just tacked to the wall and ceiling.
IE: beam sensors to GDO and GDO to wall button plus my 22/4 and 22/2 or CatXX to GDO and door sensors. I did neaten up the look of the two remote buttons burying the control wires in drywall for finishing the wall (well just to look neat - garage is drywalled) and went to using plastic conduit on the sides of the garage doors because I ran two sets of LV switches (for doors) and I didn't want to tack my wires next to the beam sensor wires. I keep a hard wired loop in place to close the door and prevent the door from hard wire opening. The alarm panel uses the remote access buttons to open and close the door.
IE: I put beam sensor wires, two NO switches (22/4 or 22/2 X 2) in the plastic conduit.
Legally (code wise) you can run 12VDC and 120 VAC in the same conduit as long as the wires / jackets are rated at 300 Volts.
I do not do this with my low voltage (alarm, 12VDC wires - DC wires) and AC voltage 120VAC wires. I did though run 16/4 cabling for speakers near some AC conduit with no ill effects (no noise on speakers).
Today I do run LV (for alarm, 12VDC, speaker wire) along outside of metal electrical conduit in the basement in certain areas. Never have had a problem with this.
IE: thermostat wall has a 120VAC switch in the same cavity (16"). In the wall is the doorbell wires, conduit for switch an conduit for thermostat. I ran the LV thermostat wires in the same conduit as the thermostat to HVAC unit with no issues and a POE cat5e cable in the same cavity.
All of my GDO LV wires are / were just tacked to the wall and ceiling.
IE: beam sensors to GDO and GDO to wall button plus my 22/4 and 22/2 or CatXX to GDO and door sensors. I did neaten up the look of the two remote buttons burying the control wires in drywall for finishing the wall (well just to look neat - garage is drywalled) and went to using plastic conduit on the sides of the garage doors because I ran two sets of LV switches (for doors) and I didn't want to tack my wires next to the beam sensor wires. I keep a hard wired loop in place to close the door and prevent the door from hard wire opening. The alarm panel uses the remote access buttons to open and close the door.
IE: I put beam sensor wires, two NO switches (22/4 or 22/2 X 2) in the plastic conduit.
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