On Saturday, 18 January 2020 01:36:23 UTC, Fredxx wrote:

Wago connectors and similar seem to be the favourite way these
days.

These seem fine for 20A or less but I'm not sure if there are an series
that can be used for a 32A ring.

The 773-173 3-core connector (note no others from the 773 range) are rated at 32A when used in maintenance free mode. Further info at http://www.wago.ltd.uk/media/wago_lt...t_51009131.pdf

Incidentally, the testing procedures (in BS 5733) for maintenance free connectors and enclosures is fairly rigorous, including running them at rated current for 63 days whilst ensuring all performance parameters are retained along with less-than 10% temperature rise of the connector. Overload conditions at twice rated current for 1.5hrs are also tested, again with performance ratings having to be retained with a maximum mounting board temperature of 90c. It all adds up to instilling some confidence in approved maintenance free solutions in my view.