how do I wire up a 30 amp circuit?

[Brian Goldsmith]

"Arpit" wrote


ok, thanks for the answers yeah I kind of see thae point to strict
regulations, high amperage mains is dangerous, i remember being able
to draw 5cm arcs with 2 carbon electrodes in alligator clips and 2 fan
heaters in series with the mains.


**** You just will not give up your position in the queue for accepting
a Darwin Award will you?

Brian Goldsmith.

 

[James]

"Rod Speed" <rod_speed@yahoo.com> wrote in message news:<c1g8pm$1hmvj6$1@ID-69072.news.uni-berlin.de>...

"Arpit" <DONTSPAMMEF00Lneko4@dodo.com.au> wrote in message news:c0cm30ljhqhnv08n6pr8bbbn8jimcbj0eu@4ax.com...
On Sun, 22 Feb 2004 00:16:28 +1000, KLR <> wrote:

On Sat, 21 Feb 2004 14:05:41 +1100, Arpit
DONTSPAMMEF00Lneko4@dodo.com.au> wrote:

On Sat, 21 Feb 2004 12:52:13 +1100, "Rod Speed" <rod_speed@yahoo.com
wrote:


Arpit <DONTSPAMMEF00Lneko4@dodo.com.au> wrote in
message news:6t7d30d4q0r3p1onq8bpi2j3p4v07kn50m@4ax.com...

Thanks everyone who replied. I got a quote for a new 30 amp
circuit - $500 dollars. Thats pretty steep for me, so what I'm
gonna do is to get the next electrician who comes to my house to
put a 32 amp outlet on the cooking range circuit, next to the range,

Get more quotes


Thats not legal, so they wont do that.

oh. I wasn't aware of that. How come its illegal?

Best just to get a new circuit run, less to go wrong that way.

Thing is though if you start pulling that much current out of a
domestic installation you can have other problems. Better get the
mains checked to make sure nothing has gone lose over the years or it
will burn. Pulling more load than usual will suddenly show up any
faults that exist even if you are running it well below design
capacity. If the wiring is old, be careful.

One other possible snag is that the power utility in your area might
not permit that kind of load. There are limitations for instanace on
the size of motor you can DOL start in a domestic area and its not all
that large. If your coil causes the neighbours lights to flicker and
they whinge to the power company, they will probably make you stop
using it as its cheaper than upgrading the supply. I suspect most
tesla coils technically do not comply with a lot of Australian
Standards which can get you into some hot water. I dont mean to put
you off building one but be careful and do not upset anyone or it
could get expensive.

Might pay to install an RCD as well, these wont protect you from the
secondary of the transformers but it will give you some added safety
relatively cheaply. Your equipment may cause a normal RCD to trip
while operating normally but you can buy ones with adjustable earth
fault trip current settings. Human safety goes down but still better
than nothing.

Anyway be careful and never hesitate to ask someone if theres
something you dont know. Good idea not to work alone either - just in
case.

cheers
James
snip

cant have 12 fan heaters plugged into that at once.

is it because with the cooker scenario, the cooker is
wired directly, and the fuse and wiring must be rated
for max cooker drawing plus max power socket rating?

The rules are certainly different with wired in devices and GPOs.

DOes this mean people can get around the legeslation
by installing a poorly rated socket and overloading it?

Nope, you arent sposed to take more
than 10A from a 10A socket for example.

What are the implications for my cooker, which is actually rated at
45 amps with everything switched on, but is on a 32 amp circuit?

Forget the detail there, but its possible that the stove
has been replaced later and the circuit not upgraded.

Its in AS3000, maximum demand for a stove in a domestic situation. Not
like anyone uses the entire stove, oven, grill at once anyway. I think
if the stove were in a commercial or industrial installation (even if
just in the smoko room) then it would need a circuit large enough to
run the whole thing.

 

[Russ]

"Brian Goldsmith" <brian.goldsmith@nospamecho1.com.au> wrote in message
news:W40%b.75775$Wa.65295@news-server.bigpond.net.au...

"Arpit" wrote


ok, thanks for the answers yeah I kind of see thae point to strict
regulations, high amperage mains is dangerous, i remember being able
to draw 5cm arcs with 2 carbon electrodes in alligator clips and 2 fan
heaters in series with the mains.


**** You just will not give up your position in the queue for accepting
a Darwin Award will you?

I'm thinking that standing in front of his tesla coil with that 7mm drill
bit impaled in his finger might attract the odd spark...

R.

 

[Rod Speed]

James <j.l@octa4.net.au> wrote in message
news:9c685cb8.0402250506.5e52791f@posting.google.com...

Rod Speed <rod_speed@yahoo.com> wrote
Arpit <DONTSPAMMEF00Lneko4@dodo.com.au> wrote

What are the implications for my cooker, which is actually rated at
45 amps with everything switched on, but is on a 32 amp circuit?

Forget the detail there, but its possible that the stove
has been replaced later and the circuit not upgraded.

Its in AS3000, maximum demand for a stove in a domestic situation.

Yeah, I meant I forget what it requires in that specific situation.

I wired my own house and got an electrician to claim he
had done it, and did do it as per the wiring rules, but that
was 30 years ago now and that detail may have changed.

I cant quite remember what the regs did require and I'm
too lazy to dig out my notes on what I actually used for that.

Not like anyone uses the entire stove, oven, grill at once anyway.

True. I still have the wall oven wired to a normal 3 pin plug
and plugged into a normal GPO. Works fine as long as you
are careful to not have the oven and grill on at the same time.

The glass topped cooktop is wired in properly.

I actually powered the entire house, including the stoves
and hot water service etc from the builder's temp supply,
thru a standard extension cord for many months. The plastic
was a tad melted where it had a knot in it at the eaves end |-)

I think if the stove were in a commercial or industrial
installation (even if just in the smoko room) then it
would need a circuit large enough to run the whole thing.

My recollection was that that was required
even in a domestic situation too 30 years ago.

The wiring rules have got more sensible since then.