Re: Running circuits together

[JoeRaisin <joeraisin2001@xxxxxxxxx>]

On 3/20/2011 7:56 PM, nick markowitz wrote:
> On Mar 20, 1:38 pm, doug<doug3...@xxxxxxxxx>  wrote:
>> On Mar 20, 7:04 am, JoeRaisin<joeraisin2...@xxxxxxxxx>  wrote:
>>
>>> Is there a code issue with running initiating circuits and notification
>>> circuits in the same raceway?
>>
>>> Another tech made this assertion, but I think he is confusing it with
>>> the out and return of a class A circuit.
>>
>> The system should be installed according to the manufacturers
>> instructions, for example, Silent Knight installation manuals state
>> that the circuits must be run in different conduits or if they must be
>> run in the same conduit it should be for as short a distance as
>> possible or you must use shielded cable.
>>
>> Doug
>
> Conventional panels not as much a problem but addressable you want to
> keep them separate to avoid bleed over
> where horns can some times be heard with a buzz in them when system is
> in normal mode.from the noise the addressable loop can inject.
> had a sub job one time I warned them to use twisted wire on the
> addressable loop they didn't and it came  over the restaurants fancy
> sound system needless to say they had to strip all the wiring out and
> replace with the right stuff. $$$
> Some people never learn see it in high end houses all the time when
> they try to use advanced panels with out the twisted wire.

Thanks for the info guys.  We are installing an MS-9600 and about 150
horn strobes.  There wasn't much area where the runs could be combined
but I'll be sure to keep them apart.