I've been given a built in oven (electric). I wired it up last night, turned
it on,
and promptly tripped the RCB for the flat. It now appears to be electrically
dead - that is, supplying it with power doesn't even trip anything. Which
suggests
the fault lies there. The switch unit on the wall still provides power out
of the
socket, so I'm assuming I haven't blown anything there (does a cooker unit
have
its own fuse?). It is, of course, on its own 30A circuit

The oven is a white double oven Ariston TC714. I don't have a manual for it,
nor
can I find any information on the web about it. Nor can I find anything
useful about
oven repair (except for microwaves!).

The only possibility that has occurred to me is that when the oven was
removed from
the old kitchen (not by me) someone dropped something - e.g. a screw in it,
thereby
shorting it. I know nothing about the workings of an oven. I am happy to go
prodding
with a voltmeter though, if someone can suggest where to look.

Any help/pointers very welcome,

TIA

Ben

Ben Blaukopf wrote:
I've been given a built in oven (electric). I wired it up last night, turned
it on,
and promptly tripped the RCB for the flat. It now appears to be electrically

Do you mean RCD or MCB? If it tripped the RCD that may well be par
for the course until it's heated up properly and dried out the
elements so the leakage reduces to an RCD-non-tripping level.

Oven elements are well known to often be marginal as regards leakage
and even 'good' ones can sometimes trip RCDs.


dead - that is, supplying it with power doesn't even trip anything. Which
suggests
the fault lies there. The switch unit on the wall still provides power out
of the
socket, so I'm assuming I haven't blown anything there (does a cooker unit
have
its own fuse?). It is, of course, on its own 30A circuit

It's odd that it now doesn't work at all, usually ovens are pretty
simple things. Does it have all sorts of clever automatic timers
etc.? If so it may well be that you have to press seven buttons at
the same time and stand on one leg to get it out of some mode where
you can't get the oven to turn on.

--
Chris Green )

Ben Blaukopf wrote:
I've been given a built in oven (electric). I wired it up last night,
turned it on,
and promptly tripped the RCB for the flat. It now appears to be
electrically dead - that is, supplying it with power doesn't even
trip anything. Which suggests
the fault lies there. The switch unit on the wall still provides
power out of the
socket, so I'm assuming I haven't blown anything there (does a cooker
unit have
its own fuse?). It is, of course, on its own 30A circuit

The oven is a white double oven Ariston TC714. I don't have a manual
for it, nor
can I find any information on the web about it. Nor can I find
anything useful about
oven repair (except for microwaves!).

The only possibility that has occurred to me is that when the oven was
removed from
the old kitchen (not by me) someone dropped something - e.g. a screw
in it, thereby
shorting it. I know nothing about the workings of an oven. I am happy
to go prodding
with a voltmeter though, if someone can suggest where to look.

Any help/pointers very welcome,

TIA

Ben

two usual causes:

wiring at the back of the oven has been dislodged in the move and needs
checking

or

timer switch has been turned on and needs returning to manual.

after that poke around with a wet finger (joke)

JK

wrote in message
...
Ben Blaukopf wrote:
I've been given a built in oven (electric). I wired it up last night,
turned
it on,
and promptly tripped the RCB for the flat. It now appears to be
electrically

Do you mean RCD or MCB? If it tripped the RCD that may well be par
for the course until it's heated up properly and dried out the
elements so the leakage reduces to an RCD-non-tripping level.
RCD

I don't know how I concluded it was dead yesterday. It's now back to
tripping. I measured the resistance across live and earth and got over
1Mohm.
Neutral is effectively completely isolated. So surely the current leakage
should be
less than 30mA and the RCD shouldn't trip (it goes as soon as I flip
the switch on the connection unit)? I realise I'm probably missing
something...


Oven elements are well known to often be marginal as regards leakage
and even 'good' ones can sometimes trip RCDs.

I've left the doors open for ventilation - I'll see how the resistance
varies...


dead - that is, supplying it with power doesn't even trip anything.
Which
suggests
the fault lies there. The switch unit on the wall still provides power
out
of the
socket, so I'm assuming I haven't blown anything there (does a cooker
unit
have
its own fuse?). It is, of course, on its own 30A circuit

It's odd that it now doesn't work at all, usually ovens are pretty
simple things. Does it have all sorts of clever automatic timers
etc.? If so it may well be that you have to press seven buttons at
the same time and stand on one leg to get it out of some mode where
you can't get the oven to turn on.

It does

Ben

In article ,
"Ben Blaukopf" writes:

I don't know how I concluded it was dead yesterday. It's now back to
tripping. I measured the resistance across live and earth and got over
1Mohm.
Neutral is effectively completely isolated. So surely the current leakage
should be
less than 30mA and the RCD shouldn't trip (it goes as soon as I flip
the switch on the connection unit)? I realise I'm probably missing
something...

The resistance might look quite different with mains across it.

An oven doesn't need to be on a 30mA RCD, and the metal sheathed
mineral insulated elements when cold are allowed to leak, which
means it's not a good idea to have it on a 30mA RCD or you can
never warm it up;-). You would normally only need it on any RCD
if the supply is a TT type, in which case it should be rated 100mA
or more.

When PAT testing a non-portable appliance with metal sheathed
mineral insulated elements, if the leakage is too high, you
are supposed to repeat the test again having run the appliance
to warm up the element. This issue most often arises if the
appliance hasn't been used for a while.

--
Andrew Gabriel

Ben Blaukopf wrote:
dead oven

The oven is a white double oven Ariston TC714. I don't have a manual
for it, nor
can I find any information on the web about it. Nor can I find
anything useful about
oven repair (except for microwaves!).

You could try emailing Ariston UK and telling them you've lost the manual
and ask for a replacement.

That's what I did with my Mothers second hand Delongi microwave, they sent a
photocopied manual out first class, no charge.

Worth a try.

--
MattG
GATSOs - Toy with them, then destroy them
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