Mitre saw tripping main breaker - Help!

[JoeCarp]

Hi all

I've just signed up to the forum as I'm at a loss with what the problem is - I've asked the (sort of) electrical guy at work and he is also out of ideas.

I myself have next to no electrical knowledge, so please bare with me..

My SIP 12" Mitre saw is being problematic. 2000 w, 13amp fuse in plug.
Manual here: http://www.sipindustrial.com/manuals/01504.pdf

I've recently moved into a new home where, the first time I used the saw there were no problems at all. A week later I take the saw out and pull the trigger. The blade spins for an instant, stops immediately and the main breaker is tripped.

I then repeatedly try flipping it back on and testing it out in different sockets (upstairs, downstairs, oven socket etc.), different/no extension leads, checking the fuse, all ending up with the same result - initial spin up then trip.

I take the saw to work (carpentry workshop) - works absolutely fine. Wiggle the cable about while running it to see if the problem is there, continues to run perfectly.

I take the saw to another house just round the corner, with presumable similar wiring - absolutely fine there as well.

So I suppose:
What's wrong/different with my house that's causing the saw to trip the main breaker?
Is the saw itself problematic, but other properties seem to be able to just deal with it?
Why would it work properly on initial use but fail to work a week later?

Thank you very very much in advance!

Joe

 

[telectrix]

easy peasy fix. get a local electrician round to change the MCB for a C type ( he''ll need to test the circuit to ensure it's parameters comply ). the C type MCB allows for a higher inrush current, common when motors start up. there's a female spark or 2 on the forum in your area may be of assistance.

and get a cord grip fitted to that plug top.

 

[JoeCarp]

Ahah, great. Any guesses on what this is likely to cost me? Thanks

 

[westward10]

Can you show a picture of your consumer unit.

 

[telectrix]

Ahah, great. Any guesses on what this is likely to cost me? Thanks

incuding materials cost.should be about £50 - £60.

 

[telectrix]

Can you show a picture of your consumer unit.

he has done. some weird make. Doekpe

 

[Pete999]

Hi all

I've just signed up to the forum as I'm at a loss with what the problem is - I've asked the (sort of) electrical guy at work and he is also out of ideas.

I myself have next to no electrical knowledge, so please bare with me..

My SIP 12" Mitre saw is being problematic. 2000 w, 13amp fuse in plug.
Manual here: http://www.sipindustrial.com/manuals/01504.pdf

I've recently moved into a new home where, the first time I used the saw there were no problems at all. A week later I take the saw out and pull the trigger. The blade spins for an instant, stops immediately and the main breaker is tripped.

I then repeatedly try flipping it back on and testing it out in different sockets (upstairs, downstairs, oven socket etc.), different/no extension leads, checking the fuse, all ending up with the same result - initial spin up then trip.

I take the saw to work (carpentry workshop) - works absolutely fine. Wiggle the cable about while running it to see if the problem is there, continues to run perfectly.

I take the saw to another house just round the corner, with presumable similar wiring - absolutely fine there as well.

So I suppose:
What's wrong/different with my house that's causing the saw to trip the main breaker?
Is the saw itself problematic, but other properties seem to be able to just deal with it?
Why would it work properly on initial use but fail to work a week later?

Thank you very very much in advance!

Joe

View attachment 37244 View attachment 37245

The main breaker you talk of, this would be I presume an RCD? it would appear that you have a possible N TO E fault in your property, have you recently done any DIY i.e, shelves, picture hanging, or anything else, grateful for a response to enable further advice.

 

[westward10]

Oh yeah didn't see that, might struggle to get a type C for that.

 

[westward10]

The main breaker you talk of, this would be I presume an RCD? it would appear that you have a possible N TO E fault in your property, have you recently done any DIY i.e, shelves, picture hanging, or anything else, grateful for a response to enable further advice.

Yes didn't spot the main breaker bit so we need to know what is tripping.

 

[telectrix]

Yes didn't spot the main breaker bit so we need to know what is tripping.

yep.is it the mcb or is ti the stupid 1980's up front RCD.

 

[JoeCarp]

Forgive my ignorance, I'm not up to speed on the RCD or N TO E jargon. What are they?

When it trips, I flip the switch on the far left side of the unit pictured and it's all ok again.

As far as DIY goes, we've just moved into the house so various shelves and pictures have gone up, yes. How might this effect it?

 

[Pete999]

Forgive my ignorance, I'm not up to speed on the RCD or N TO E jargon. What are they mean?

When it trips, I flip the switch on the far left side of the unit pictured and it's all ok again.

As far as DIY goes, we've just moved into the house so various shelves and pictures have gone up, yes. How might this effect it?

You may inadvertently drilled / damaged cables

 

[Pete999]

Forgive my ignorance, I'm not up to speed on the RCD or N TO E jargon. What are they?

When it trips, I flip the switch on the far left side of the unit pictured and it's all ok again.

As far as DIY goes, we've just moved into the house so various shelves and pictures have gone up, yes. How might this effect it?

RCD Residual current Device, protects against faults like N to E faults whereby the N conductor comes into contact with the Earth conductor.

 

[JoeCarp]

Ok. How can I test for the N to E fault? Why would it only show up using the saw and not anything else? Regardless of upstairs/downstairs sockets too

 

[Pete999]

Ok. How can I test for the N to E fault? Why would it only show up using the saw and not anything else? Regardless of upstairs/downstairs sockets too

Joe, you don't seem to understand, without the required test equipment and knowledge you would find it impossible to test your installation, you need the services of a qualified Electrician, to test, locate and repair any faults that may be present.