wrote in message
ups.com...
:::Jerry:::: wrote:

There is nothing to stop any idiot, who can open a plug,
replacing a
3amp fuse with the shank of a 8mm bolt, with radial circuits and
final protection back at the distribution board that is not so
easy,
especially if that final protection is via circuit breakers - so
yes,
the final 'ring circuit' is wide open to abuse. It was years
before
all appliances came pre-fitted with plugs and the correct fuse,
how
many people fitted a plug without then changing the supplied
13amp
fuse to the correct lower rating?...

As I said, the final ring circuit is a 'one size fits all'
solution
that is open to abuse.


Decades ago we had exactly that system. All sockets were on
radials,
all fused at the fuseboard. There were 3 ratings, 2A, 5A and 15A,
ensuring each apliance was ideally fused. Each appliance had the
right
plug fitted, and there was no plug fuse to tamper with.

There are a veritable list of good reasons why we moved away from
that
system to what we now have. It was riddled with problems inherent
in
its design, as well as the more well known problems in its
implementation.

The whole point of having fused plugs is that a faulty appliance
that
pops a fuse is disconnected, so if its plugged in again, to another
socket, it isnt live once more, and dangerous once more.

The whole point of having appliance fuses in plugs rather than at
the
fuseboard is so that it is practically possible to fit the right
fuse.
It doesnt guarantee it by any means, but it means the right fuse
will
frequently be used. When the fuse is at the board, the applince
will
simply use whatever fuse supplise that socket, regardless.

The whole point of having both a plug fuse AND a fuseboard fuse or
mcb
is that if one is defeated, there is a backup still working.

The whole point of rings instead of radials is to increase safety,
reliability and socket availability.


As I said, the final ring circuit is a 'one size fits all'
solution
that is open to abuse.

EVERY system is open to abuse. Our ring system puts safety backups
in
place in case of abuse. Your all-radial vision does not.

Only if abused by idiots, as is any system.


And your radial system leaves dangerously faulty appliances in a
dangerous state. And the risk of fixed wiring fire is significantly
higher, and so on.

Only if someone is daft enough not to recognise that the appliance is
faulty, or are you saying that the final protection is somehow
different on a radial circuit?

Any way, if someone puts another fuse into a BS1363 type plug, the
appliance is again dangerously faulty, and will again trip it's
protection device. You seem to be making an argument for totally fix
wiring, with all appliances connected via FCU's !...

As for fire risk, how is it any higher on a correctly protected
radial circuit than a correctly protected ring circuit - if you are
correct why do we still use radial circuits in houses even today ?!


Does anyone understand the ring system these days?


I suspect more than you think, and many can see the problems with it.