Diversity over the top???

[holte end74]

hi there ive been reading with interest, pages 65&66 of the OSG explains wiring of fire detectors and alarms its states that where all circuits are protected by RCDs there is a advantage in supplying fire detectors from regulary used lighting circuits.It also states there should be a means of isolating the supplyto the alarms without affecting the lighting. how can this be achieved?

 

[wigan]

Hi Holte end74

On some units the base of the detector is akin to a socket outlet for all intents and purpose. The detector head plugs in and you twist it, similar to a starter for a fluorescent light fitting. Thats your simple isolation, to isolate base open circuit mcb.

Regards,

Kev

 

[plug444]

i was taught separate circuit or a regularly used lighting circuit on my 17th. only stipulation was interconnections

If you install the Aico Radio link system then you have too supply the bases from the local lighting circuits!

 

[zupos40]

with reference to latest thinking on smoke detector and fire equipment read page 14 Electrical safety council mag summer 09 follow link below

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