I have been looking at these boxes to understand if I feel comfortable using them.

https://www.wiska.co.uk/en/30/pde/10112450/konnektit-204-cl--3x221-413.html

They have a temperature rating of 60 Deg C, 10 below the 70 Deg C the core of a thermoplastic cable can reach. Connections are actually made with wago connectors.

Reading the brochure and TLC web site they are suitable for 1.5mm cable and 32A, clearly we can't put 32A down a 1.5mm cable.
Reading the actual box in very small writing it says 2.5mm cable and 20A, better, but cable core could still be at 70 Deg C.

No instructions supplied but from what I can see but I can't see any way to prevent it being opened without a tool, like other similar products.

I have asked Wiska about the temperature rating and they just came back and said ask NAPIT.

Is it reasonable to assume that the outside of a cable and wago connector would be at least 10 Deg C below the temperature of the core, and therefore in terms of temperature everything is ok?

Bit surprised that a company like Wiska has such poor documentation and am wondering if I have missed something.

Even with my concerns I think it's actually a good solution for bringing together two way lighting connections etc.