Power Limited, 480 & 208

[iwire]

Anyone see any problems with this?

Working on a remodel and I have to tie into the existing fire alarm system.

I opened up a "Fire Alarm" junction box and found plenty of fire alarm conductors along with 480/277 & 208/120.

 

[tom baker]

Re: Power Limited, 480 & 208

What I have heard is you are OK on box fill as long as you can get the cover on.

 

[websparky]

Re: Power Limited, 480 & 208

Hi Bob,

Have you considered this:

2002NEC 760.26 Conductors of Different Circuits in Same Cable, Enclosure, or Raceway.
(B) Fire Alarm with Power-Supply Circuits. Power-supply and fire alarm circuit conductors shall be permitted in the same cable, enclosure, or raceway only where connected to the same equipment.

 

[websparky]

Re: Power Limited, 480 & 208

If it is a power limited system:

2002 NEC
760.55 Separation from Electric Light, Power, Class 1, NPLFA, and Medium Power Network-Powered Broadband Communications Circuit Conductors.
(A) General. Power-limited fire alarm circuit cables and conductors shall not be placed in any cable, cable tray, compartment, enclosure, manhole, outlet box, device box, raceway, or similar fitting with conductors of electric light, power, Class 1, non?power-limited fire alarm circuits, and medium power network-powered broadband communications circuits unless permitted by 760.55(B) through (G).

 

[iwire]

Re: Power Limited, 480 & 208

Dave I should have put the wink

I just thought people might get a laugh from my headache.