On Tue, 13 Mar 2012 00:28:07 -0000, Frank Erskine wrote:

On Mon, 12 Mar 2012 16:17:16 -0700 (PDT), NT
wrote:

On Mar 12, 7:03 pm, "Lieutenant Scott" wrote:
On Mon, 12 Mar 2012 19:00:41 -0000, NT wrote:
On Mar 12, 2:27 pm, "Lieutenant Scott" wrote:
On Mon, 12 Mar 2012 09:22:56 -0000, NT wrote:
On Mar 11, 8:41 pm, "Lieutenant Scott" wrote:
On Sun, 11 Mar 2012 20:31:16 -0000, NT wrote:
On Mar 11, 7:49 pm, "Lieutenant Scott" wrote:
On Sun, 11 Mar 2012 19:27:58 -0000, NT wrote:
On Mar 11, 10:37 am, "Lieutenant Scott" wrote:
On Sun, 11 Mar 2012 01:21:13 -0000, NT wrote:
On Mar 10, 10:15 pm, "Lieutenant Scott" wrote:
On Sat, 10 Mar 2012 21:40:14 -0000, John Rumm wrote:
On 10/03/2012 20:30, Lieutenant Scott wrote:
On Sat, 10 Mar 2012 20:10:38 -0000, NT wrote:

One could go even further: with an RCD there's very little theoretical
need for double insulation or earthing, one could simply use very thin
speaker wire.

It's the fire hazard that would concern me more. Speaker wire could get
snagged easily.

a tad over 2A is unlikely to do it much harm...

A minor short could easily occur if it's flimsy wire, which can cause a fire.

Either don't make the insulation flimsy, or do and have a little
consideration for where the wire goes. Bell wire isnt damaged by
normal use and abuse - but then its far from 0.16mm2.

Conductors can easily be reinforced by simply including string in the
cable.

String is stronger than wire?

Is it? news to me.

No. So why did you say "conductors can easily be reinforced by simply including string in the cable"?

because they can be, and string's cheaper than more copper.

Make up your mind! You just questioned me saying string is stronger than wire.

Perhaps the confusion isnt in my mind.

No, it's in your clarity with words.

Another approach I'm a lot less sure about is to use copper
clad steel to increase conductor strength.

Anyway, if you're not earthing, then brass lighting fixtures wouldn't be
protected against loose live wires,

The RCD does that. Or one can mandate only plastic and double
insulated metal fittings on such circuits.

How can an RCD protect it? Since the fitting isn't earthed, there will be no current flow to earth. The thing will sit there with a live chassis.

RCD protects against shock from live things by cutting the power if it
becomes live and you touch it.

I'd be more concerned about fire from the chassis being live and conducting to god knows what. If the live wire is loose, the neutral might be too.

it current flows from L to somewhere earthy, the RCD trips.

And with no earthing in the lighting circuit like you suggested......

The CPC to the lights is usually not part of the shock path

It can't be if there is no earth in the lights! Hence the shock will more likely be to a neutral....

...from someone I keep having to explain elementary stuff to.

What part of the absent earth meaning the fault will stay there don't you understand?

What I dont understand is how someone can be so sure of themselves
when they have such a profound lack of knowledge on the topic

Because people are prepared to argue with him he feels that he's a
vital contributor to the discussion...

He's probably a loner with no proper friends.

Or maybe I'm just asking questions and pointing out your mistakes......

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