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

[datadiffusion]

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 July 12, 2019 by datadiffusion

[al-yeti]

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 

[Shaunb1905]

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

[james.wilson]

but a very short length ie 50m vs 0.05m

[sixwheeledbeast]

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

[Specialist]

21 hours ago, al-yeti said:

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

Agreed, virtually impossible at times.

[Specialist]

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.