The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement

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
  • Locked Locked
  • Replies 8 replies
  • Subscribers 31 subscribers
  • Views 3971 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

BS 8519

Frankie 223
Hello,


I understand that the standard identifies the need for a dedicated containment for the fire rated life safety circuits. I assume this is so the normal circuits (non fire rated) will not compromise the integrity of the life safety circuits in case of fire (eg normal circuits will be on fire before the fire rated circuits which will be next to them if they were installed on the same containment).


But wouldn’t the same happen with the cpcs of the life safety circuits that are not fire rated?


Furthermore, is it ok to install on the same containment a circuit with 30 mins fire survival time (eg fire alarms) along with a circuit of 1 or 2h fire survival time (eg disabled refuge)?


I was under the impression that the fire survival time of a circuit is based on its wickest component but this does not always seem to be the case since the cpc are installed in the same containment.


It would be appreciated if you could share your thoughts.
Parents
  • 0
    I suspect that this is an area where we need to read the BS very carefully. I have BS5266 - 1999 to hand, so I may be out of date, but this talks a lot about separation, then says that if such separation is not provided MICC can be used, and then says "equally acceptable would be any cable complying with BS6387 ...".

    Perhaps someone can read the current versions carefully to see if this is still the situation.
Reply
  • 0
    I suspect that this is an area where we need to read the BS very carefully. I have BS5266 - 1999 to hand, so I may be out of date, but this talks a lot about separation, then says that if such separation is not provided MICC can be used, and then says "equally acceptable would be any cable complying with BS6387 ...".

    Perhaps someone can read the current versions carefully to see if this is still the situation.
Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines