Baldyhugh said:

Take a standard socket outlet or spur

BS 1363-2 states the following:

Terminals in rewirable portable socket‑outlets shall be of screw‑type and permit the connection, without special preparation, of flexible cables having nominal conductor cross‑sectional areas of 1 mm² and 1.5 mm² as given in BS EN 50525‑2‑11:2011 and BS EN 50525‑2‑12:2011.

If the the product can't achieve that, then it does not conform to BS 1363 (and hence the Plugs and Sockets (Safety) Regulations)

Do the socket-outlets made by MK with Wago-type lever terminals fail to comply with BS 1363? After all the terminals are not of screw-type. (Unfortunately I don't have a copy of BS 1363 to check.)

RB1981 said:

Do the socket-outlets made by MK with Wago-type lever terminals fail to comply with BS 1363? After all the terminals are not of screw-type. (Unfortunately I don't have a copy of BS 1363 to check.)

BS 1363-2 covers screwless terminals as well. In this case, the same Clause applies to screwless terminals. There are (understandably) certain provsions in the standard that are unique to screwless terminals and some unique to screw terminals (for example, tightening torque requirements for screw terminals make no sense for screwless terminals).

I couldn't make the same statement about "doubling up" with screwless terminals, though !

The MK rapid fix sockets states that it accepts 2.5mm2 and 4mm2. I presume that they are talking about t&e, again they are not specific enough. Just says ‘accepts 2.5mm2 and 4mm2’. If not then 2.5mm2 t&e won’t comply due to 1.5mm2 cpc.

Baldyhugh said:

If not then 2.5mm2 t&e won’t comply due to 1.5mm2 cpc

I think the cpc would have to comply with the requirements for cpc terminals, and the manufacturer is talking about csa in terms the live conductors of a UK  2.5 sq mm installation cable (6242Y) which has a reduced cpc (because we usually call this 2.5 T&E in the industry).

I would ask the manufacturer.

The adverts seem to show smaller tunnels for the CPC, but in any event 2.5 mm² and 4 mm² T&E both have a 1.5 mm CPC. If the technical specs are online, I cannot find them. I wonder whether they could handle a full-sized CPC if wired in singles?

Chris Pearson said:

the technical specs are online, I cannot find them.

The one's I've seen just say "capacity" (which means they can hold less ... just doesn't tell us how much less).

Chris Pearson said:

the technical specs are online, I cannot find them.

The one's I've seen just say "capacity" (which means they can hold less ... just doesn't tell us how much less).

That’s the jist of my point. You will soon be able to determine if a cable is too large for a terminal as it won’t fit in, but a smaller one will obviously fit in the terminal, however the important thing is whether it will be clamped securely. This is where in the absence of technical data,technical judgement comes in.

Baldyhugh said:

This is where in the absence of technical data,technical judgement comes in

Is the technical data actually absent? I've not scoured the internet or enquired myself, but the short-form "data sheet" isn't really a full specification, is it?