Overcurrent protection

[DWCOCKBURN]

The evidence suggests that you are correct about the temperature being the key, but experience has demonstrated that it will be the join between the line pin of the 13amp plug and the socket outlet where the point of ignition will be found.

 

[DWCOCKBURN]

If you choose a 32amp BS EN circuit breaker it should therefore be matched with a 4.0mm conductor ring final circuit and earthed metal-clad socket fronts.

 

[Brother Blue]

The evidence suggests that you are correct about the temperature being the key, but experience has demonstrated that it will be the join between the line pin of the 13amp plug and the socket outlet where the point of ignition will be found.

Well you really have wandered off into the rhubarb now haven't you! You've jumped from discussing small overloads to points of ignition.

If there is ignition at a point such as you describe then it will be the result of an arc which can be protected against by an AFDD.

Changing the size of conductors will not do anything to help this new situation you have raised

 

[Brother Blue]

If you choose a 32amp BS EN circuit breaker it should therefore be matched with a 4.0mm conductor ring final circuit and earthed metal-clad socket fronts.

Could you explain this please because, do far, you haven't provided anything to support this statement.

A standard ring final circuit can have 2.5mm conductors and the material that the socket is made from is irrelevant to the issue of overloads whether they be small, medium or large.

 

[DWCOCKBURN]

Look at the photos of Grenfell.

 

[Brother Blue]

Look at the photos of Grenfell.

Why? What has that got to do with this?

As far as we know that fire was caused by a faulty appliance, not what we are discussing here

 

[DWCOCKBURN]

Take a very close look at the photo's then.

 

[Brother Blue]

Why, that won't help your point at all.

Could you please just explain your point, make a well reasoned technical post so we can actually understand your point and then discuss it.

A statement that we just need to look at some photos of a disastrous fire which appears to have no relevance to your point is not helpful and doesn't explain anything.

 

[DWCOCKBURN]

A Faulty fridge freezer, a fuse then wrapped in silver paper, the point of ignition was the join between the 13amp plug and the socket outlet, a 32amp BS EN MCB in the 'ON' position, after the fire burned the insulation from the conductors, a short circuit then operated the RCD.

 

[DWCOCKBURN]

Teenagers understand the theory of continuity, therefore electricians must understand overcurrent protection.
Unless you plan to blame the childlike mind that wrapped the fuse in silver paper.

 

[Brother Blue]

When and where has a fuse been wrapped in paper and what does that have to do with the overload protection of circuits?


You are making less and less sense.

 

[DWCOCKBURN]

I'm not an expert but as far as I know; there shouldn't be any need to take a three pin plug apart before you can X-ray the fuse.

 

[mainline]

I'm not an expert

I’ll agree with that

but as far as I know; there shouldn't be any need to take a three pin plug apart before you can X-ray the fuse.

x ray it for what ?

Some have removable fuses no need to take them apart.

 

[DWCOCKBURN]

To see whether the fuse element was still intact.

 

[mainline]

To see whether the fuse element was still intact.

It must have been open circuit otherwise why was it wrapped in foil.

I don’t think you would need an x ray machine to test for that.

 

[DWCOCKBURN]

Take a look at the photo of the X-ray.

 

[Brother Blue]

What photo of an X-ray?

If you want us to look at a picture the please post it up so we can see it.

And to answer your earlier point yes you would need to remove the fuse from a plug in order to get the best possible X-ray image.

 

[DWCOCKBURN]

They had to clean residue off of the fuse before X-raying it, then they added a photo of the X-ray into the report that was available online.
The fuse element was still intact.

 

[DWCOCKBURN]

It is Friday, I have had enough for one week.
Have a nice weekend.

 

[DWCOCKBURN]

Hang on a minute!

Does this mean your 'friends in high places' have been removing evidence from the internet?

Not to worry, I imagine the Police will have copies.