On Sat, 22 Nov 2014 19:27:49 +0000, John Rumm
wrote:
On 22/11/2014 16:52, Tim Watts wrote:
On 22/11/14 16:31, ARW wrote:
"Tim Watts" wrote in message
...
http://i61.tinypic.com/72stmr.jpg
Woopee it's a clamp. It's now in the right place.
But I am impressed I'm getting immeasurably small resistance readings
everywhere, including right back to the bathroom basin taps (0.04
Ohms) from the main earth terminal.
Is this ADS or EEBAD:-)?
The former now isn't it? Pretty sure it was EEBADS when I did my exam.
I'm not big on names, especially when they change just to mean the same
thing!
Although to be fair, its a bit more than just a name change... with ADS
one can forgo most of the supplementary EQ bonding.
So here goes:
"Live wire, phase, earth bond, bulb, "
That should give a few people apoplexy ;-)
nope, not biting ;-)
On a serious note -
I am very much against the continual changing of nomenclature for the
sake of it which we seem to get a lot of these days...
My water pipe has a main equipotential bond to the main earth terminal.
So we might as well say it's earth-bonded. 90% of regular people at
least know what that means. The other 10% would shove the wire into a
pot plant on the window cill.
Indeed they will. The only problem with the nomenclature is that is
actually makes understanding the reason for its existence a bit more
difficult.
If you can keep the concepts of earthing and EQ bonding separate in your
mind, the whole point that they do different things (limit the duration
of a shock, vs limit its magnitude), by different mechanisms (opening a
CPD with a fault current Vs limit potential difference) is much easier
to get a grip on I find.
"PIR" was easy to say. Does anyone ask for an "EICR"?
Yup agreed it does not add much. I suppose the fact that the P was not
necessarily actually true is what sank that one.
I was trying to find a numerous picture of the earth wire thing. But I
found this instead:
http://www.dailymail.co.uk/news/arti...-cannabis.html
WTF? I did not know weed could do that (even superstrenghth weed).
That last photo in particular looks fairly scary... still I suppose the
power was off by then!
We still take are cars for an MOT test even though the MOT was
abolished in 1970.
I dare say some people still refer to the electrical regs as IEE
There must be other historical agencys that are still around through
common usage.
--
Graham.
%Profound_observation%