Combining two workshops, I have extended an existing wall mounted 50mm
steel trunking run to provide 3 more 13 amp socket outlets.

The head scratching moment came with the choice of ways to connect up to
the existing ring. Ladder work, series connection with the last socket
in the existing ring and loop back or what I decided which was to
connect alternate sockets going out and intermediates on the way back.
--
Tim Lamb