a fused spur for a domestic alarm. just to settle a we argument at work lol,

is it ok to spur off a ring main in 2.5 t&e?

and what about spuring off lighting circut im 1.5 t&e?

what is the proper reg for spurs for alarm? cable size? etc

My preference is a dedicated circuit.

However a sput in 2.5mm T+E is ok

Not recommending the lighting circuit idea.

just as i thought i was alway told to spur 2.5t&e off a ring main

why wouldnt you recommend coming off a lighting circut with 1.5 t&e?

2.5 of a ring main and 1.5 of a light circuit but what happens when customer is away on holiday with the alarm set and say the light circuit trips with a blown bulb on day one two etc.....?

you leave lights on 24hr when you go away?

Only way to put a new circuit in is to be part p.

you leave lights on 24hr when you go away?

No but some people use 'plug in' lights to simulate activity whilst away

Only way to put a new circuit in is to be part p.

Ehmmmmmm..................so all intruder companies etc adhere to this?

But I always come off a 230v ring with a spur anyway!.....................

'Plug in' lights..........

The key is in the sentance, they are 'plug in' hence on ring so wont trip lighting ciircuit. Personally I dont see a problem with spuring off lights so long as the circuit demand allows i.e. A circuit with 11 or 12 lights on it couldn't really cope with the demnad of an alarm. 4 or 5 and your fine. Also make sure the breaker is labelled at the CU as lighting AND ALARM. Obviously other methods are better but sometimes, just sometimes, there is no option.

'Plug in' lights..........

The key is in the sentance, they are 'plug in' hence on ring so wont trip lighting ciircuit. Personally I dont see a problem with spuring off lights so long as the circuit demand allows i.e. A circuit with 11 or 12 lights on it couldn't really cope with the demnad of an alarm. 4 or 5 and your fine. Also make sure the breaker is labelled at the CU as lighting AND ALARM. Obviously other methods are better but sometimes, just sometimes, there is no option.

no wont trip a lighting circuit but the ring main may well be covered by an rcd Earth leakage device, now RCDs are prone to tripping on earth faults correct, so if the pond or outdoor sockets trip sai rcd while on holiday then the same situation arrises, dedicated circuit every time on an MCB not an rcd installed within regs to comply with that cable not been buried in a wall.

Edited April 5, 200917 yr by satsuma01

Only way to put a new circuit in is to be part p.

Why a new circuit?

Part P not required for everything

Why a new circuit?

Part P not required for everything

part p only required for new circuits in special locations ie outside areas, kitchens, and bathroom, and i dought the panel will be installed in a bathroom