Smoke Alarm - cable colours

[diy_dude]

Can I have some clarification on which colour cores to use when wiring in my mains smoke alarms? They have an interconnect wire (white).

The manual states:
Line - Red or Brown
Neutral - Black or Blue
Interconnect - Black

Now, I don't have two black cores in my 3+E cable, which one should be using the grey?

Should I use:
Live - Brown
Neutral - Black
Interconnect - Grey

I am not quite comfortable with this as Brown is a new cable colour and Black is the old neutral, I feel this is confusing two versions of the colour system.

This leaves:
Live - Brown
Neutral - Grey
Interconnect - Black

This feels better to me, but is using grey for neutral OK?

PS LABC notified.

 

[plugwash]

either is fine by BS7671 but grey as neutral is the convention the electromafia preffer. make sure you sleeve the neutral blue.

 

[C&GStudent]

Don't we need to sleeve the interconnect brown?

 

[Taylortwocities]

Only necessary to sleeve if it is carrying mains voltage - I rather think the interconnect will be a low voltage telemetary signal. I stand ready to be corrected by alarming people

TTC

 

[diy_dude]

I dont know the exact voltage, but the Interconnect is not mains voltage.