Fuse replacement 2A with 3A

[Bumfluff]

Sorry BM gotta jump in here.

BS1362 starts at 3A. This is your bog standard 1363 plug cartridge fuse.

The 2A fuse is likely to be the glass kind that came from inside a device. The OP has prolly got his PC power supply in bits and has found a blown fuse and wants a cheap quick fix, rather than jolly on over to Maplin and buy a pack of 10 for £2.69

According the the great british wiring regs, a fuse is a protective device. It is there to protect the equipment not the operator I should hasten to add.

The 3A fuse has a greater circumference than the 2A glass fuses and would bend the clamp so that is a problem, although when the relevant 2A fuse was sought the clamp could be bent back to tightly clasp the 2A fuse. Repeated abuse of the clamp would result in metal fatigue though.

Also, given the tolerances argument, lets say for arguments sake they are both +-10%

This means the peak current for the 2A fuse is 2.2A and 3.3A for the 3A chap.

So an extra 1.1A could be provided to the unit.

IIRC P(ower) = V*I

so at 230V P = 230 * 2 = 460W @ 2A

and the power @ 3A would now be
P=230 * 3 = 690W

An extra 230W of power.

Now given our tolerance of +-10% the peak current is 3.3A

P=VI = 230 * 3.3 = 759W

So our little 460W device is now 3 quarters of an electric bar fire.

These devices are rated by the designers for a reason, and 2A was chosen to protect the device. Worst case a small fire, best case a knackered set as the thing that blew the fuse in the first place has not been cured, and has just has an extra 1.1A pulled through it.

HTH

Nah its not the glass type and Maplins don't have them, found 2 places that did. Anyway I'm going to use a 3A, I think I know what the problem might be now, the device that is not working is a outside light, controllled by an electronic timer, apperently the timer needs a bulb in the outside light to complete the circuit and without the electronic timer won't work.


Actually its for my time machine need to get it started and get out of 2009 and back to 80's

[cailin maith]

Actually its for my time machine need to get it started and get out of 2009 and back to 80's

Well when you go back in time - when you see your ex for the first time.... think - Nah!

[NotAllThere]

If all the components are rated to handle 3A of current, you'll be ok. Otherwise

[suityou01]

Nah its not the glass type and Maplins don't have them, found 2 places that did. Anyway I'm going to use a 3A, I think I know what the problem might be now, the device that is not working is a outside light, controllled by an electronic timer, apperently the timer needs a bulb in the outside light to complete the circuit and without the electronic timer won't work.


Actually its for my time machine need to get it started and get out of 2009 and back to 80's

Here

I am worried. You can't use google, and have a blatant disregard for safety. Hang on a mo, more contracts less competition. Carry on me ole son.

[Bumfluff]

Well when you go back in time - when you see your ex for the first time.... think - Nah!

Hahaha when I first met my ex I actually thought 'what a stuck up cow' and didnt like her but my crotch took over, your know any port in a storm , if I could go back now I would of still had my wicked way but I wouldnt of bothered calling her after

[Bumfluff]

Here

I am worried. You can't use google, and have a blatant disregard for safety. Hang on a mo, more contracts less competition. Carry on me ole son.

But maplin only sell the glass 2A and its 15mil I need the standard 2A at 20mil. Yeah your right I really shouldnt mess with electrics, I did have an incident a while back trying to fix the dishwasher, should of learnt my leason.

[cailin maith]

Hahaha when I first met my ex I actually thought 'what a stuck up cow' and didnt like her but my crotch took over, your know any port in a storm , if I could go back now I would of still had my wicked way but I wouldnt of bothered calling her after

Good lad!

[suityou01]

But maplin only sell the glass 2A and its 15mil I need the standard 2A at 20mil. Yeah your right I really shouldnt mess with electrics, I did have an incident a while back trying to fix the dishwasher, should of learnt my leason.

have.

Stop now please.

[bogeyman]

have.

Stop now please.

I was about to suggest he test the fuse by placing his tongue across the terminals while the fuse was in-circuit.

Kill or cure

[suityou01]

I was about to suggest he test the fuse by placing his tongue across the terminals while the fuse was in-circuit.

Kill or cure

A brilliant solution Mr BM.