Electrician has use flexi cable for boiler installation.

[RigidRaider]

Interesting discussion!

Sorry, my lack of knowledge has confused things a little; the crimped connection is within a square section plastic extrusion with a removable front - therefore trunking?

The setup has boiler, pump and Y plan valve together in the utility room and cylinder stat, room stat receiver and some relay boxes in the airing cupboard then the boiler timer and master switch halfway between. There's quite a lot of cable running between them!

 

[ColJack]

Seems to me that you're interpreting the regs to read what you want to read. There's no reason that an enclosure must have a removeable lid.

everybody does that

in a trunking, the cable can be removed from it, crimped in situ and put back
in a conduit, for the crimp to be halfway up the tube, you'd have to pull it back to an access point, crimp a new bit on it, then pull it back up the tube... so why not just leave the crimps at the access point so you at least know they're there..

there's also the mechanical stress of pulling the crimp back into the conduit...

 

[gas4you]

As a boiler engineer I know nothing about the crimping regs etc, never get involved with that side.

I only run flex for the last 1 metre from the isolator next to the boiler, or from the cyl stat/pump etc to the wiring centre.

Everything else is always in the standard grey flat cable.

The flex to the boiler should also be heat resistant to 85C.

 

[Spark123]

Personally I think that having crimps inside a conduit is a bad idea, especially should someone try to pull another cable in at a later date.

Inside trunking isn't as bad as the cable can be laid in, but I still don't like it and would try to refrain from doing this too.