[Gllug] OT: Merging UPS outputs

[Dylan]

On Wednesday 31 Aug 2005 10:09, John Winters wrote:
<SNIP>
> 15A plugs are used in theatres for a very simple reason - they don't
> have fuses in them.  Every time a bulb blows it will take the fuse
> out and a single lantern might be connected through several pieces of
> tail, each with a plug and socket.  Working through all of those to
> replace the fuses would be impossible.  Instead each circuit is
> individually fused back at the dimmer rack (with special fast-blow
> fuses to protect the dimmers) so you know exactly where to go to
> replace the fuse.

They also prevent some twit plugging a vacuum cleaner or amplifier or 
any other device into a dimmer output. Running a motor off a triac or 
thyristor channel can be intresting to say the least. 'Kettle' plugs 
are also used on some lower power (sub 1Kw,) usually portable kit.

>
> Tail (extension leads in non-theatre speak) is gradually disappearing
> now, with hard-wired sockets close to each potential lamp location.

Maybe in large commercial venues, and indeed there is a legal limit of 
1.5m on a tail which is observed in the breach more often than not. In 
the smaller venue, especially of the "art centre" or church hall 
variety, tails often comprise the whole system still.

Dylan

>
> John

-- 
"The man who strikes first admits that his ideas have given out."
                                                (Chinese Proverb)
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