On Thursday, 5 November 2020 14:57:57 UTC, Martin Brown wrote:
On 05/11/2020 14:39, John Rumm wrote:
On 04/11/2020 19:49, Dr S Lartius wrote:

Entering that plug are two different leads connected to two
different items of low-power fixed communal equipment (it is
not easy to see what each of those actually does - or did.

Might be worth taking it apart to have a look inside.


You could try leaving it unplugged to see what if anything stops
working. It could be for some long since redundant legacy kit.

The socket is the only likely source of significant electrical power in the cupboard.

Lower down, there is a rat's nest of thin wires presumed to include POTS service and the wiring providing buzzer, two-way voice, and front door release for each residence. That seems to be connected to a strange box, perhaps a UPS, which has an input from the plug, daisy-chaining to an electro-mechanical timer (Sangamo-Weston, IIRC), which probably deals with timed entry, which was removed in 2014. It is, however, still going round and showing about the right time. I wonder what power it consumes!

But there is no need to unplug it; the socket has a switch.


--
(c) Dr. S. Lartius, UK. Gmail: dr.s.lartius@ |