18 years ago
conduit like mom always told me to, but now I've run into this worry
about different signals:
I'm using 12VDC for operating latching relays for my lighting system,
and i'm using 24VAC for my HVAC needs (thermostats, zone valves).
Both of these are class 2 and run in the same conduit.
Is there a great risk of running into induced voltage nasties between
the two types of signals? For example, would a 24VAC circuit induce
a relay to trip on the 12VDC circuit it is running aside?
I was going to use the cheaper unshielded cable (of type CL2, CM, CMP
etc) for both types of signal but now I'm not so sure. Maybe I should
shield one or the other.
Any comments appreciated.
PS. The conduit used will be EMT or IMC, not decided yet. The relay
Magnecraft model 711
coil power: 1.8 watts DC
coil resistance: +/- 10% measured at @ 25C
pulse duration: 50 milliseconds
contact resistance: 50 milliohms max
contact rating: 12 amps @ 120/240 VAC 50/60 HZ
set/reset time: 35mS max