It means that this is legal, as long as the low-voltage wires are (A) CL-3, CL-3R, or CL-3P, and (B) that at least 1/4" separation between the stripped portion of the low-voltage conductors and the power wiring is maintained, or a non-conductive sleeve is covering the stripped portion of the low-voltage wires.

By stripped, I mean where the outer sheath of the low-volateg cable has been removed.

HMM...taking this a little further how about a hv box with a clear window. 1963... your idea is probably better but your partition only needs to house about 1 cu." for the blaster/emitter. Good thinking. Now that's thinking inside the "box". bad pun

I am sitting in a 3 day lighting class at Crestron right now and the instructor just said that a low voltage PLENUM RATED wire can sit IN the same box as the 120VAC wire. Of course we discussed this point for 20 minutes and he agrees that reality of inspections can be different.

Just thought I'd throw it out there.

Thoughts?

I know what CMR(cable multi-use riser) and CMP(cable multi-use plenum) mean but tried researching the acronym CL and came up with nothing. My question is where can I find the translation of acronyms for a specialty field such as electrical? TIA

It's always up to your local inspectors.

The only advice I have is talk to the inspectors and the EC *BEFORE* you run LV in a HV box. Ours were very cooperative as we went over the NEC code.

Meet them at their office, take them to lunch, whatever, but *don't* have the first conversation on a jobsite with the prewire already completed. Almost like double-dog daring them to shut you down.

They can be held responsible for their decisions years down the road, so don't force them to make a call on the spot - you may not like the answer & it's not fair to sneak up on them. Sometimes it's all about how you approach authority, turf & egos issues.

We have been sued once over a lighting system that required Cat5 to control wall-box dimmers. The homeowners lawyers contended that LV in an HV box alone was proof that we violated code. The local inspector backed me up 100% because he had personally signed off on that exact application 3 years earlier. I felt very smart that day.

thanks larry