Overcurrent protection

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• Jul 4, 2025

• #41

DWCOCKBURN said:

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

Click to expand...

So someone wrapped an intact fuse with foil and it caused a fire due to a faulty appliance ? Is that supposed to be a surprising thing to happen ?

 

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DWCOCKBURN

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• Jul 4, 2025

• #42

Yes.
Unless you wish to blame a fourteen year old.

 

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DWCOCKBURN

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• Jul 4, 2025

• #43

Did you never do that as a kid?

 

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DWCOCKBURN

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• Jul 4, 2025

• #44

All electrical circuits must be protected against 'a small overload of a long duration'!

 

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• Jul 4, 2025

• #45

DWCOCKBURN said:

Look at the photos of Grenfell.

Click to expand...

The fire originated in a Hotpoint fridge-freezer in flat 16 on the fourth floor. A faulty electrical connection, possibly a loose wire, within the appliance is believed to be the cause.

There was initial confusion and speculation about consumer units (fuse boxes) being a potential cause, stemming from a change in how the London Fire Brigade reported these types of fires.

Actual Cause:
Investigations revealed that the fire started due to an electrical fault in a fridge-freezer located in a fourth-floor flat, specifically a poorly crimped wire connection within the fridge's wiring

 

Last edited: Jul 4, 2025

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• Jul 4, 2025

• #46

DWCOCKBURN said:

Yes.
Unless you wish to blame a fourteen year old.

Click to expand...

If they did it, and it caused a fire, who would you blame ?.
In England and Wales, the age of criminal responsibility is 10.

 

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• Jul 4, 2025

• #47

I would blame you for not learning your trade.

 

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• Jul 4, 2025

• #48

All electrical circuits must be protected against 'a small overload of a long duration'.

 

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• Jul 4, 2025

• #49

Protecting an electrical circuit from 'a small overload of a long duration' isn't even particularly complicated!

 

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• Jul 4, 2025

• #50

All you have to do is compare two figures and make sure that one exceeds the other.

 

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• Jul 4, 2025

• #51

Where is the complicated part?

 

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• Jul 4, 2025

• #52

DWCOCKBURN said:

Where is the complicated part?

Click to expand...

There isn't one.

433.1 Coordination between conductor and overload protective device
Every circuit shall be designed so that a small overload of long duration is unlikely to occur.

So if you want some electrical work done, call a decent electrician who complies with bs7671.

 

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• Jul 4, 2025

• #53

Please do not quote legally disclaimed information!

 

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• Jul 4, 2025

• #54

433-01-01 A protective device shall be provided to break any overload current flowing in the circuit conductors before such a current causes a temperature rise detrimental to insulation, joints, terminations or the surroundings of conductors. Every circuit shall be designed so that a small overload of a long duration is unlikely to occur.

 

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• Jul 4, 2025

• #55

Call an electrician who complies with electrical wiring regulations that have not been legally disclaimed by their authors.

 

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• Jul 4, 2025

• #56

Notice how it is written in plain English and tells me what I need to achieve.
That way I don't have to ask you.

 

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• Jul 4, 2025

• #57

I think we’ve had enough of this.

I’m locking the threads

 

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