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Do Fire Alarm Circuits Need To Be Segregated From All Other Circuits

james.wilson
in General Fire Alarm Queries

Featured Replies

Certainly the Fike manual tells you to keep fire cables at least 20cm (IIRC) from any other electrical cable - and if you wanted to rely on BS7671, that also compels you to follow manufacturers instructions, so...

 

As above, @Scotmod hasn't signed in for about 3 years, so better to start a new thread. And, welcome :)

Edited by datadiffusion

So, I've decided to take my work back underground.... to stop it falling into the wrong hands

 

1 hour ago, datadiffusion said:

Certainly the Fike manual tells you to keep fire cables at least 20cm (IIRC) from any other electrical cable - and if you wanted to rely on BS7671, that also compels you to follow manufacturers instructions, so...

 

As above, @Scotmod hasn't signed in for about 3 years, so better to start a new thread. And, welcome :)

You try keeping it away by 20cm in allot places very difficult 

It’s seems daft to me when you think that the cables in the panel like the zone, loops, sounder circuits etc  are close to the mains cable and connections

  • Author

but a very short length ie 50m vs 0.05m

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Inductance is measured over a conductors parallel length, this is why you may cross cables perpendicularly but they must have separation/segregation when parallel.

    • Upvote 1
    21 hours ago, al-yeti said:

    You try keeping it away by 20cm in allot places very difficult 

    Agreed, virtually impossible at times.

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    11 hours ago, sixwheeledbeast said:

    Inductance is measured over a conductors parallel length, this is why you may cross cables perpendicularly but they must have separation/segregation when parallel.

    :yes:

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