Re: FS: All manner of Acorn Hardware

In article <4f844add85Spambin@xxxxxxxxxxxxx>, Stuart
<Spambin@xxxxxxxxxxxxx> wrote:
In article <4f840022aftim@xxxxxxxxxxxxxx>, Tim Hill
<tim@xxxxxxxxxxxxxx> wrote:
PATesting equipment can be hired with full instructions. If you can
assemble Ikea furniture or build an Airfix kit it's not at all
difficult (plug it in, push a button, wait a few seconds for the word
PASS to appear on a display) BUT the visual inspection is the most
important and oft-overlooked part.

A PAT instrument measures earth continuity, vital in case an internal
fault causes external metal parts to become live. You cannot tell this
by simple visual inspection. It measures insulation resistance,
something which falls slowly over a period of time causing the
equipment to become dangerous, and earth leakage current non of which
can be ascertained by visual inspection alone.

The electrical test is at least as important as the visual inspection.

51/49 ? Let's not split hairs. They are both important.

Insulation this can fail slowly Internal cables which lose their now
brittle insulation can pass a PATest as air is quite a good
insulator(!) but are a bit of a danger to probing fingers. Many a
theatre technician has had a hefty shock from bare cables, touched
when changing a lamp.

Then you need to change your equipment and procedures.

Please don't draw false conclusions. Both MY equipment and procedures are
fine, thanks.

It should never be possible to touch cables internal to equipment with
(especially an adult) fingers

You have never opened a wide variety of luminaires have you?

and lanterns should be isolated before
opening up to change lamps.

Of course, but occasionally people do stupid things. Or they thing when
the dimmer is at zero, there is no power to the lantern. Or there are so
many lanterns on a barrel, they unplug the wrong one for a quick lamp
change.

Apart from anything else lamps become
extremely hot

NSS.

and if a lamp is plugged into a powered socket the flash
of light and sudden heat will have its own effect on the idiot doing
it, never mind the reduction in lamp life caused by the sudden current
surge

That reads as though you expect even an idiot to touch the bare glass of
a lamp when installing it. Sadly, that may be true.

In fact, connecting a, say, 1Kw lamp without a dimmer will often lead to
instant failure, whether this is by inserting it into a live fitting, or
simply using a 15 to 13A tail to plug it into a wall socket.

I wouldn't necessarily trust a qualified electrician over a theatre
techie when it comes to checking my lanterns.

Sounds like your techies aren't to be trusted either, all the
electricians I know would have more sense than to poke fingers into, or
open up powered equipment.

Obviously not the stupid ones. They're all dead from electrocution.

Are you a troll?

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