Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Replies 2 replies
  • Subscribers 34 subscribers
  • Views 177 views
  • Users 0 members are here
Options
You may also be interested in

Fire alarm addressable system - wiring

Tom D

I have a few outdoor switchgear enclosures that are fitted with fire alarm devices. The customer is responsible for providing the fire panel and incoming loop cables for the enclosures that I am designing.

The client suggested using FP500 cable, but as far as I am aware, the internal wiring can be performed using FP200 Gold/Plus, which they later agreed to.

Obviously, every enclosure needs its own JB for the OUT and IN loop cables. My question is whether I can use a multicore 4C+E FP500 cable (two cores for the OUT loop line and two cores for the IN loop line) or whether separate dedicated 2C+E cables are required for each line.

An approximate explanation of my project is provided below, with two options: top one with one multicore cable covering the OUT/IN lines, and bottom with two separate cables dedicated to each line.

Parents
  • 0

    Short answer use two 2 core cables.

    longer answer a single cable fault can only disable a maximum of 2000m2 and not more than one floor of a building plus or minus 5 devices. 
    are you fitting isolators (not the electrical kind the fire alarm kind)  in each of the enclosures ?  To limit cable faults?
    the other reason not to use 4 core is cross talk on the loop as it is a data signal 

  • 0 in reply to Will Lloyd

    Thanks Will. The project is not massive and definitely not 2000m2 :)

    Basically, we are talking about a few containers 10-20m x 5m. Some of them connected to each other and some standing 50-100m away from them. When the fire occurs, all I need from this fire circuit is survive for a couple of minutes not hours so honestly any JB and regular plastic terminals will do but rules are rules I guess.

Reply
  • 0 in reply to Will Lloyd

    Thanks Will. The project is not massive and definitely not 2000m2 :)

    Basically, we are talking about a few containers 10-20m x 5m. Some of them connected to each other and some standing 50-100m away from them. When the fire occurs, all I need from this fire circuit is survive for a couple of minutes not hours so honestly any JB and regular plastic terminals will do but rules are rules I guess.

Children
No Data

Community Rules & Guidelines