On Thu, 21 Mar 2013 23:57:14 GMT, wrote:

On 21 Mar,
Frank Erskine wrote:

I can't say I've ever encountered a 230v emergency lighting system;
only 48/50v ones. Even they're a bit large to be called "portable",
and they've always been "hard-wired" to the mains.

I've come across 240vDC emergency lighting, but it predated PAT testing, and
wasn't happy with any variety of lighting other than filament lights.

More recently 110v DC emergency lighting, but fixed wiring so not subject to
PAT testing. It was a pain checking the batteries on both systems, quite a
lot of cells, and the 240 volt system had lots of 1kw lamps.

I've worked on 120v DC "continuity sets", and as you say checking the
batteries is a PITA. Testing pilot cells now and again wasn't too bad,
but testing SG and voltages of every cell was best avoided where
possible ;-)

73 -

--

Frank Erskine

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