GPO's per circuit, how many in latest regs?

[Phil Allison]

"David" = fuckwit of monumental proportions !!!!!

Phil Allison wrote:

The actual tempco for copper is 0.0039 per degree C - look it up
anywhere.


Seems to me that the resistance would increase by 3*3*0.0068 = 9.0612


** Even dumber than the previous dumb error.

A 10 amp rated, two core, sheathed cable running at 32 amps will get very
bloody hot - a rise of 125 C above ambient is not unlikely.

125 x .0039 = 0.49 or 49 % increase in resistance.


Two errors there today Phil.

1) Extension cords are not allowed to be two core, they must be three core
to be legal.

** There are only TWO *current carrying* conductors - you IMBECILE
!!!!

2) The tempco is not linear, but exponential.

** ABSOLUTE FUCKING BULLSHIT !!!!!!!!!!!!!!!!!!!!!

If you had finished Uni,

** If YOU had ever gone to such place - you FUCKING LIAR !!!

you would know that it is really

(1+ 0.0039)^125 not 125 * 0.0039.

The actual increase in resistance is approx 1.63 times, or 63% increase,
not 49% increase.

** Tempco is LINEAR you fucking, lying utter criminal MORON .

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/restmp.html


Now, admit you are no engineer at ALL !!

You are a fucking electrician !!




................ Phil

 

[Lance Ryan]

Geoff.C
Stick to this rule and you wont go wrong:-
As many outlets as you like, as long as the total number of outlets on that
circuit doesn't exceed 2/3 of the total number of outlets within the
installation.

"David" <no_way@hotmail.com> wrote in message
newsan.2005.01.12.22.17.50.734000@hotmail.com...

On Thu, 13 Jan 2005 01:55:44 +1000, KLR wrote:

On Wed, 12 Jan 2005 22:03:23 +1100, "Russ" <nomail@hotmail.com> wrote:

KLR wrote:

Although probably a very politically incorrect test procedure -
Putting one of these inbuilt RCD type sockets in circuit and
momentarily shorting together the neutral to earth on the OUTPUT side
and seeing if it trips would tend to prove if this "downstream
protection" exists or not.
failing that:

Assuming there is no load on the output of the RCD, would there actually
be
any current between neutral & earth, or are you assuming there is a
load?




OOPS - Didnt think of that one.

I would imagine there would have to be a load there as you suggest,
however on 2 occasions (in different installations) I have experienced
RCDs tripping under fault condition even with the main switch TURNED
OFF and no (Active) power entering the circuit


I didnt check it in detail as it wasnt in my premises, however both
would have been pretty modern setups that were built and wired during
the late 1980's

RCD's will normally trip if you short the neutral to earth on an RCD
protected circuit. This is because there is normally a voltage
differential between the neutral and earth due to load currents in that
circuit other circuits. When you short neutral to earth, there will often
be sufficient current (greater than 30mA) flow in the neutral to trip the
RCD, as there is no balancing current in the active. This will happen even
if there is no load in that particular circuit.

David

 

well say you have a 10A outlet in your living room, a 10A outlet in
your bedroom, and a 10A outlet in your bathroom. you would need a 25A
breaker to run a hairdryer, a heater in the bedroom, and your home
theatre system.