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Old 12th Jan 2016, 2:47 pm   #232
unabridged
Tetrode
 
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Join Date: Jul 2011
Location: Birmingham, West Midlands, UK.
Posts: 88
Default Re: Another unusual plug and some other questions

Yeah; the room hasn't been used for TV stuff for at least 20 years, but back when it was put in in the early 70's it was there to provide some kind of clean supply and forced seperation from domestic circuit for certain bits of kit - on a seperate phase i think.

As the room changed and was no longer used for TV stuff (this is a college so it changes a lot) the supply for these was removed, and at some point it has just been tagged onto an MCB in the domestic board.
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