Smoke Detector Wiring

[bilbo_88]

Hi All

Just a quick one. Recently had a job to install inter linked smoke detectors in the communal area of a house converted to 2 flats. Health and safety requested standard mains powered smokes with interlink.

I wired this through floors in T+E as I would in a standard domestic property, but have been pulled by another electrician stating it has to be in FP200. I have wired these from the lighting circuit (also wired in T+E) and used radio link bases so wiring it in FP200 seems pointless and pretty harsh reason to fail an EICR?

Any opinions and reg references are appreciated

 

[westward10]

Ask what Reg you have breeched. Are the cables exposed on the escape routes.

 

[Octopus]

Is the T&E visible? surface mount?

Is the property going to be a HMO?

 

[bilbo_88]

Cable Is in surface mounted trunking with fire clips inside. Not a HMO, literally upstairs and downstairs landing with front door to each flat on each floor

 

[westward10]

Cables on escape routes should be avoided however not prohibited and should be kept as short as possible if it is necessary. Even if the cable were low smoke the trunking is not and I probably would have used FP. Are you being told why it is not suitable.

 

[Specialist]

Might be wrong (Happened before) but don't the rules class a house where 2 or more people live & that are not related as a HMO ?. So although it's been subdivided inside, it may still class as 1 house as with bedsits.
Think I'd be asking the local authority what they class it as.

 

[charlie76]

What grade of system is it?

 

[charlie76]

From BS5839-6:2013 it sounds like what you have put in is a grade D system, this should however have been communicated to you at tender stage by the specifier. It is implied by the equipment they have told you to install but you should confirm this. If this is the case (Grade D) then BS5839-6:2013 clause 16.5 a) states that "may comprise any cable suitable for domestic mains wiring"

 

[westward10]

Don't think the type of system is relevant it is the wiring method on an escape route. Be interesting to know the comment on the EICR

 

[charlie76]

Don't think the type of system is relevant it is the wiring method on an escape route. Be interesting to know the comment on the EICR

If it were a grade A, B or C then he would be using FP. The wiring method described in BS5839-6:2013 states that it should be installed as per BS7671 which doesn't ask for FP on escape routes.