On 17/01/2020 16:42:31, Andy Burns wrote:
Fredxx wrote:

I can't seem to find any info on their derating?
What's the significance of the MF mark?

"MF" officially makes them "maintenance free" see the final section of

http://enews.wago.com/art_resource.php?sid=8u8pz.k3ilfc,force_download=1

There may be newer info for the newer 221 connectors and XL boxes.

That's very useful, thanks. It seems the 222 series would be fine for
lighting or a max 20A circuit.

The 221 series is outlined:

http://www.wago.ltd.uk/media/wago_lt...t_60341289.pdf

and claims a current rating of 32A but the table of Maintenance Free
Installation Instructions gives a max current rating of 20A, same as
the 222 series. Is this a feature of BS 5733 rather than the actual
connector?