Trying to wade through UL's site; determined that standards are sold.
Can someone help identify what standard is involved in electrical cabling?
Specifically, within a product, I need to cable (within one sheath) 110vac and shielded control lines. Off the "top of your head", is this acceptable?
Is there a UL-related forum?
Regards, Wayne
Off the top of my head, it might be acceptable. There is no general requirement that a shielded cable be seperated from 110VAC. However, in many cases it would probably be a bad idea and/or not to code.
Take a look at the code requirements for class 1, 2 and 3 circuits and tell me if this idea meets the requirements there. then tell me if your applicati> Trying to wade through UL's site; determined that standards are sold. >
As soon as I learn how to properly search, "wade" through UL's site, I'll reply to your question.
The application is such that a composite cable IS required, i.e. 110VAC and coax lines all in one sheath.
If I understand correctly you want to run line and low/control voltage in the same cable and this cable is shielded.
If line and control voltages are the same then your good to go.
If the above statement is correct then I believe you need some more research with the NEC as well. Generally the NEC wants all of the current carrying conductors disconnected from a single location/switch/over current device. Most inspectors where I live would be having kittens and cows on something like this if there was two sources of power in the same cable.
Depending on the application and length of run this method might be more trouble than running two cables.
The NEC does not apply within a product. UL standards dictate the requirements. He needs to look at the applicable UL standard for the end product to determine what is acceptable.
Ben Miller
You need to obtain and study the UL standard for whatever your end product is. Off the top of my head, what you want to do is often acceptable as long as all insulation is rated for the highest voltage. However, there may be special requirements for your product. Often there are simple methods that will accomplish compliance with the UL requirements. It takes some experience.
Regards
Ben Miller
You can buy 75 ohm (RG59) and a two conductor cable in a figure eight configuration. It is used for security cameras and is used to power the camera with 24 VAC (or DC, depending on the camera) and return the video to the control point in one cable. Belden, and other wire&cable companies make it.
The RCA TK 46 color studio cameras I worked on had multiple coaxial cables, along with 120 VAC and numerous DC voltages on the single control cable.
There are multiple pair shielded cables with separate shields used for audio or control applications. I've used a fair amount of 15 and 27 pair over the years.
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