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 13 replies
  • Subscribers 31 subscribers
  • Views 2632 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

Burglar/Intruder Alarm Cable

ebee

The thread about colour coding got me thinking.

Not wanting to hijack that thread though.

I was going to waffle on but determined to save you all from that.

So Burglar/Intruder alarms - hardwired not wireless.

We use 6 core alarm cable quite often but in the days before PIRs it was common to use 4 core.

Those having a set colour coding usually picked which colours were for which function and stuck with that.

Those starting their careers when 4 core was common (before PIRs were invented) had a slightly different mindset to those that started on 6 core because PIRs were already in vogue.

Anybody agree/disagree ?

 

Parents
  • 0

    Arran Cameron: 
     

    Alarm cable has stranded conductors whereas telephone and Cat5e cable has solid conductors arranged in twisted pairs.

    Agreed this is normally the case … but BS 4737-3.30:2015 permits solid (and also permits aluminium or composite conductor construction). From Clause 5:

    5 Conductors
    Conductors shall be plain or tinned annealed copper, plain aluminium, or composite construction using suitable metals constructed in accordance with Table 1.

    Conductors shall consist of a single solid wire or multiple strands of wire of the same material. The conductor construction shall be the same for all conductors in any single cable.

Reply
  • 0

    Arran Cameron: 
     

    Alarm cable has stranded conductors whereas telephone and Cat5e cable has solid conductors arranged in twisted pairs.

    Agreed this is normally the case … but BS 4737-3.30:2015 permits solid (and also permits aluminium or composite conductor construction). From Clause 5:

    5 Conductors
    Conductors shall be plain or tinned annealed copper, plain aluminium, or composite construction using suitable metals constructed in accordance with Table 1.

    Conductors shall consist of a single solid wire or multiple strands of wire of the same material. The conductor construction shall be the same for all conductors in any single cable.

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