Aico alarm wiring instructions

[JohnW2]

No need to oversleeve the interconnect wire on a smoke brown though.

As I wrote in the bits of my post that Simon quoted, that is clearly the case, since the 'interconnect wire' in neither AC nor LV (and not really part of a 'power' circuit'. As such it would seem that BS7671 allows it to be 'identified' with Brown, Black, Red, Orange, Yellow, Violet, Grey, White, Pink or Turquoise - i.e. virtually all of the common colours (plus some others) with the one exception (for whatever reason!) of blue

 

[CountryFan]

No need to oversleeve the interconnect wire on a smoke brown though.

No, black is a standard colour (along with brown and grey) for line conductors and therefore does not need sleeving brown.

Surely it does though under 514.3 of BS7671:2018? I can't see any other get out clause.

It's also as per the manufacturers instructions

 

[Risteard]

I've justmade the mistake of looking at the instructions for one of my Aico alarms, and found this ....

View attachment 401309

I have no idea what's available in Ireland (so maybe they do have brown/blue/white cables there), but where, I wonder, do they think we are likely to find this hypothesised brown/blue/black cable in the UK?

RD415 cable is used in the south of Ireland for domestic smoke/CO detector installations.

It has a pink sheath.

And, contrary to your beliefs, it is absolutely used for smoke alarm installations despite not being used for other purposes.

 

[JohnW2]

Surely it does though under 514.3 of BS7671:2018? I can't see any other get out clause.

See what I recently wrote.

The 'interconnect'conductor of an alarm does not carry AC, nor mains voltage (it is 'ELV'), and is not a line conductor of either a single-phase or 30pahse 'power circuit' - so BS7671 does not require it to be identified with brown.

Rather, it presumably qualifies as "Control circuits, ELV and other applications", in which case Table 51 of BS7671 allows it to be identified with black or brown (or Red, Orange, Yellow, Violet, Grey, White, Pink or Turquoise)

It's also as per the manufacturers instructions

The manufacturers are free to say what they wish, provided it is compliant with BS7671 - which, as above, would be the case with brown identification (but also with Black, Red, Orange, Yellow, Violet, Grey, White, Pink or Turquoise).

 

[JohnW2]

RD415 cable is used in the south of Ireland for domestic smoke/CO detector installations. It has a pink sheath.

Good for them. This is an "Electrics UK" forum.

For what it's worth, without 'looking it up' I personally have no idea what RD415 cable is.

 

[Risteard]

Good for them. This is an "Electrics UK" forum.

For what it's worth, without 'looking it up' I personally have no idea what RD415 cable is.

You were the one who asked what was used there though. And by all means look it up.

 

[JohnW2]

You were the one who asked what was used there though. And by all means look it up.

I did, and I will - but only out of curiosity.

 

[JohnW2]

You were the one who asked what was used there though. And by all means look it up.

It appears that RD415 cable has brown, blue, white and G/Y insulated conductors. Is that correct?

If so, I'm therefore a bit of a loss to understand how such a cable could be used in accordance with the manufacturer's instructions, which call for the interconnect conductor to be identified by black.