On Wednesday, 29 July 2020 10:17:04 UTC+1, Tricky Dicky wrote:
I would check the details of that junction box, 32A may be the headline
figure when used in a standard setting it might be reduced in maintenance
free mode. I have used Wagos extensively recently they too are rated at 32A
but the leaflet provided points out that used in maintenance free mode their
rating should be derated to 20A and quotes some BS number as the standard for
compliance which I suspect applies across the board to all such connectors.

The 773-173 connectors are good for 32A in maintenance free mode (they do appear to be the notable exception to the general rule though).

https://www.wago.com/gb/installation...oxes/p/773-173
https://www.wago.com/gb/download/pub...t_51009131.pdf

Mathew