I've just noticed that the power supply to our garage (running fridge-
freezer, 2 lights, tumble-dryer & whatever power tool I need to use
(e.g. strimmer)) connects back to our consumer unit at a MT106 MCB
(6A) - and this is also the upstairs socket circuit. I am now very
surprised that this hasn't tripped every time we use the tumble-dryer
(2700W).

Is there a large tolerance on these things?

Thanks in advance for any input

Paul

In article 9f0acbb9-f578-4130-b692-
,
says...
I've just noticed that the power supply to our garage (running fridge-
freezer, 2 lights, tumble-dryer & whatever power tool I need to use
(e.g. strimmer)) connects back to our consumer unit at a MT106 MCB
(6A) - and this is also the upstairs socket circuit. I am now very
surprised that this hasn't tripped every time we use the tumble-dryer
(2700W).

Is it possible that you've followed the cable incorrectly and it's not
that trip at all but the ring-main one next to it?

--
Skipweasel - never knowingly understood.

On Jan 21, 5:57*pm, sfby wrote:
I've just noticed that the power supply to our garage (running fridge-
freezer, 2 lights, tumble-dryer & whatever power tool I need to use
(e.g. strimmer)) connects back to our consumer unit at a MT106 MCB
(6A) - and this is also the upstairs socket circuit. I am now very
surprised that this hasn't tripped every time we use the tumble-dryer
(2700W).

Is there a large tolerance on these things?

Thanks in advance for any input

Paul

See the graphs on
http://wiki.diyfaq.org.uk/index.php?title=MCB


NT

On Jan 21, 6:04*pm, Skipweasel wrote:
In article 9f0acbb9-f578-4130-b692-
,
says...

I've just noticed that the power supply to our garage (running fridge-
freezer, 2 lights, tumble-dryer & whatever power tool I need to use
(e.g. strimmer)) connects back to our consumer unit at a MT106 MCB
(6A) - and this is also the upstairs socket circuit. I am now very
surprised that this hasn't tripped every time we use the tumble-dryer
(2700W).

Is it possible that you've followed the cable incorrectly and it's not
that trip at all but the ring-main one next to it?

--
Skipweasel - never knowingly understood.

Don't think so - flipped the trip switch & all upstairs sockets went
off & the garage lights went out!

sfby wrote:
I've just noticed that the power supply to our garage (running fridge-
freezer, 2 lights, tumble-dryer & whatever power tool I need to use
(e.g. strimmer)) connects back to our consumer unit at a MT106 MCB
(6A) - and this is also the upstairs socket circuit. I am now very
surprised that this hasn't tripped every time we use the tumble-dryer
(2700W).

Is there a large tolerance on these things?

Thanks in advance for any input

Has it ever tripped? Is the CU correctly labelled?

I am guessing it is a Hager CU as it uses MT106 labelled MCBs. Hager are as
good as you get for quality IMHO.

--
Adam

In article 84607f44-e7f0-487e-8332-2548e88cc423
@j25g2000vbs.googlegroups.com, says...
Don't think so - flipped the trip switch & all upstairs sockets went
off & the garage lights went out!


OK! Someone cocked up - sockets are more usually on a much higher
capacity circuit.

--
Skipweasel - never knowingly understood.

On Jan 21, 7:43*pm, Skipweasel wrote:
In article 84607f44-e7f0-487e-8332-2548e88cc423
@j25g2000vbs.googlegroups.com, says...

Don't think so - flipped the trip switch & all upstairs sockets went
off & the garage lights went out!

OK! Someone cocked up - sockets are more usually on a much higher
capacity circuit.

--
Skipweasel - never knowingly understood.

You haven't one of those dubious copy mcbs from the far east which
dont have any guts inside do you? I'd be very dubious if a 6A never
tripped with a 3kW tumble drier hanging onto it. Easiest option would
be to swap the mcb for a good one from a reputable source.

On Jan 21, 5:57*pm, sfby wrote:
I've just noticed that the power supply to our garage (running fridge-
freezer, 2 lights, tumble-dryer & whatever power tool I need to use
(e.g. strimmer)) connects back to our consumer unit at a MT106 MCB
(6A) - and this is also the upstairs socket circuit. I am now very
surprised that this hasn't tripped every time we use the tumble-dryer
(2700W).

Is there a large tolerance on these things?

Thanks in advance for any input

Paul

Are you sure it's not 16A ? 6A is only about 1.5Kw.

cynic wrote:
On Jan 21, 7:43 pm, Skipweasel wrote:
In article 84607f44-e7f0-487e-8332-2548e88cc423
@j25g2000vbs.googlegroups.com, says...

Don't think so - flipped the trip switch & all upstairs sockets went
off & the garage lights went out!

OK! Someone cocked up - sockets are more usually on a much higher
capacity circuit.

--
Skipweasel - never knowingly understood.

You haven't one of those dubious copy mcbs from the far east which
dont have any guts inside do you? I'd be very dubious if a 6A never
tripped with a 3kW tumble drier hanging onto it. Easiest option would
be to swap the mcb for a good one from a reputable source.

But for what size MCB? You have to assume that the 6A MCB is there for
reason.

--
Adam

On Jan 22, 9:20*am, "ARWadsworth"
wrote:
cynic wrote:
On Jan 21, 7:43 pm, Skipweasel wrote:
In article 84607f44-e7f0-487e-8332-2548e88cc423
@j25g2000vbs.googlegroups.com, says...

Don't think so - flipped the trip switch & all upstairs sockets went
off & the garage lights went out!

OK! Someone cocked up - sockets are more usually on a much higher
capacity circuit.

--
Skipweasel - never knowingly understood.

You haven't one of those dubious copy mcbs from the far east which
dont have any guts inside do you? I'd be very dubious if a 6A never
tripped with a 3kW tumble drier hanging onto it. Easiest option would
be to swap the mcb for a good one from a reputable source.

But for what size MCB? You have to assume that the 6A MCB is there for
reason.

--
Adam- Hide quoted text -

- Show quoted text -

Oops!!

Thanks for your help everyone, but I've taken a closer look in
daylight & realise
I was looking at the wrong MCB after all - the one I should have
checked is a
32A which makes a lot more sense.
(Face glowing gently red!)

Paul

In article
,
sfby wrote:
I've just noticed that the power supply to our garage (running fridge-
freezer, 2 lights, tumble-dryer & whatever power tool I need to use
(e.g. strimmer)) connects back to our consumer unit at a MT106 MCB
(6A) - and this is also the upstairs socket circuit. I am now very
surprised that this hasn't tripped every time we use the tumble-dryer
(2700W).

Is there a large tolerance on these things?

Thanks in advance for any input

Sounds like you need a pro to check things out. A 6 amp MCB is for
lighting - not sockets - and if this is wrong what else is?

Using a too small MCB on a circuit isn't a safety issue - but if it had
been wrongly wired so a 32 amp one is on a lighting circuit the results
could be dire.

--
*Suicidal twin kills sister by mistake.

Dave Plowman London SW
To e-mail, change noise into sound.

sfby wrote:
On Jan 22, 9:20 am, "ARWadsworth"
wrote:
cynic wrote:
On Jan 21, 7:43 pm, Skipweasel wrote:
In article 84607f44-e7f0-487e-8332-2548e88cc423
@j25g2000vbs.googlegroups.com, says...

Don't think so - flipped the trip switch & all upstairs sockets
went off & the garage lights went out!

OK! Someone cocked up - sockets are more usually on a much higher
capacity circuit.

--
Skipweasel - never knowingly understood.

You haven't one of those dubious copy mcbs from the far east which
dont have any guts inside do you? I'd be very dubious if a 6A never
tripped with a 3kW tumble drier hanging onto it. Easiest option
would be to swap the mcb for a good one from a reputable source.

But for what size MCB? You have to assume that the 6A MCB is there
for reason.

--
Adam- Hide quoted text -

- Show quoted text -

Oops!!

Thanks for your help everyone, but I've taken a closer look in
daylight & realise
I was looking at the wrong MCB after all - the one I should have
checked is a
32A which makes a lot more sense.
(Face glowing gently red!)


:-))

--
Adam

[This followup was posted to uk.d-i-y and a copy was sent to the cited
author.]

In article 205580a4-0e8d-463f-b28e-e112ebc2e727
@g26g2000vbz.googlegroups.com, says...
Thanks for your help everyone, but I've taken a closer look in
daylight & realise
I was looking at the wrong MCB after all - the one I should have
checked is a
32A which makes a lot more sense.
(Face glowing gently red!)

You know how I hate to say "I told you so"?...

--
Skipweasel - never knowingly understood.