Re: quick installation question...

["Russell Brill" <russwbrill@xxxxxxxxxxxxx>]

"Frank Olson" <Use-the-email-links@xxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:X%CWh.114615$DE1.31970@xxxxxxxxxxxx
> Andy C wrote:
>
>
>> ok thanks,
>> if we leave the mains in its own trunking... is there still a problem
>> with running all the other cables together (telephone, cat5, alarm
>> sensors)
>> the mains wiring was installed by a builder who i now suspect is no more
>> a qualified electrician than i am - he just told us to run everything in
>> the same trunking and ran it in oversize trunking for that reason... but
>> seemed odd hence i thought i should check
>> thanks,
>> andy
>
>
> Keep low voltage cable at least 12" away from high voltage cable.  All of
> your AC is 220, so I'd increase that distance further.

 If the AC is
> in steel conduit (not PVC), and properly grounded, you shouldn't have a
> problem strapping your low voltage cable to it.

I avoid strapping my cables to any electrical raceway. (See NEC 2005,
Section 300.11 -B-).................................


If you need to cross
> over to the other side of and exposed high voltage run, do so at as close
> to a 90 degree angle as you can get.  As for telephone, I've seen some
> installations that utilize the brown/white-brown pair of the CAT5 for the
> phone with no problems although I personally wouldn't do it.
>
> It is definitely against code to run high voltage and low voltage in the
> same conduit, but once again, I've seen it done with emergency lighting.
> How the inspectors justify passing this I haven't a clue.  The only thing
> I can surmise is that they don't know one of the 12 gauge pairs is "AC"
> and the other 12VDC and the elecrician (who's out to get his installation
> approved so he can invoice the job) fails to mention it.