Fuse rating from wire CSA

[RF Lighting]

I have in my hand a 60A BS3036 fuse.

To me the fuse wire looks too big to be 60A

I have measured the wire and calculated the area to be 3.08mm², and would like to verify if this is really 60A fuse wire.

Is there anywhere which gives wire rating based on the CSA?

 

[JohnW2]

I have in my hand a 60A BS3036 fuse. To me the fuse wire looks too big to be 60A I have measured the wire and calculated the area to be 3.08mm², and would like to verify if this is really 60A fuse wire. Is there anywhere which gives wire rating based on the CSA?

The pic below is part of a spreadsheet on my laptop - can't recall where it came from. If it's correct, it suggests that your intuition is very right (and I would thought the same). Admittedly, the rating of the fuse will be well below the 'fusing current', but, even so ....!!

Common sense suggests that 3.08mm² conductor cannot possibly have a fusing current anything like as low as would be needed for a 60A fuse, given that 2.5mm² cable is effectively rated rated to safely carry about 39A (27A * 1.45) for at least an hour (clipped direct).

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• JohnW2
• 25 Apr 2013
• 1

Kind Regards, John

 

[Robin0577]

According to this..

http://www.tlc-direct.co.uk/Products/TLFW60.html

it should be 17 SWG or 1.589 mm2

 

[JohnW2]

According to this..
http://www.tlc-direct.co.uk/Products/TLFW60.html
it should be 17 SWG or 1.589 mm2

That seems pretty consistent with my spreadsheet - a fusing current of around 120A is probably right for a 60A fuse.

Kind Regards, John

 

[RF Lighting]

No wonder the fuse holder burnt out and the fuse survived then

 

[EFLImpudence]

Table 53.1 60A - diameter 1.53mm. - csa 1.83mm².

You have 100A - diameter 2.0mm.

 

[RF Lighting]

Ah ha!

According to my verniers, the wire is 1.99mm dia. so I guess that'd be 100A fuse wire then

 

[333rocky333]

from the 14th regs book

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• 333rocky333
• 25 Apr 2013
• 1

 

[EFLImpudence]

From the 17th Amd 1 regs. book, aka BGB - Table 53.1

 

[ban-all-sheds]

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• 333rocky333
• 25 Apr 2013
• 1

Dear God, is it really time to have my eyes tested again?