Adding Ei interconnected smoke/heat alarms to existing.

[silly_savage]

Feel like I should get some confirmation that this plan is legit, I'm adding a couple of interconnected Ei alarms to my existing ones, fitted as part of renovations last year to satisfy building control.

Currently only the kitchen and hall are interconnected, I'm adding the utility and garage would like to connect up the existing landing one to them too at some future point. I have a clear run for a cable down a soil stack void for that last one. Boards are currently up anyway so may as well do it hard-wired rather than shelling out for wireless modules. The new units are the Ei 3016 and 3014. Plan is to run all the new ones to a point just above the utility where I have an access panel in the ceiling and connect them up with Wagos. I'm using 1.5mm 3 core & Earth.

Any issues with any of this? I've done basic wiring on the lighting circuit before, this seems pretty much the same but with the extra core.

 

[CountryFan]

Not a spark, but seems ok imo. However, don’t think you can just Wago it without housing them in a junction box or similar. RF modules are decent enough, as long a short you house code them. You would need 3 though to link all of them up.

 

[silly_savage]

Not a spark, but seems ok imo. However, don’t think you can just Wago it without housing them in a junction box or similar

Oh yeah, didn't mention but I've got the junction box, will even use zip ties and cleats which seems to be more than most sparks bother with!

Just realised that the junction will be the wrong side of a joist and thus inaccessible unless I fancy making the hole in my joist bigger for 2 extra cables to fit through. Can't see me ever needing to join more to it so that shouldn't be a problem, just means I need to get some more cable and connect up the landing one now before the floor goes back down.

 

[CountryFan]

Just realised that the junction will be the wrong side of a joist and thus inaccessible unless I fancy making the hole in my joist bigger for 2 extra cables to fit through. Can't see me ever needing to join more to it so that shouldn't be a problem, just means I need to get some more cable and connect up the landing one now before the floor goes back down.

If it’s going to be inaccessible, then opt for a maintenance free junction box

 

[silly_savage]

If it’s going to be inaccessible, then opt for a maintenance free junction box

That's what the Wago JB is, as far as I know

 

[Murdochcat]

The cable needs to run continuously from alarm to alarm

 

[silly_savage]

The cable needs to run continuously from alarm to alarm

Is this from regs? I've seen no mention of it before.