Which fuse should I use?

[Chris Crebbice]

Regarding a laptop charger that is marked 100-240V @ 3.2A input, and is rated 230W output, what fuse should I fit to this? I'm assuming the 3.2A is for the 100V input, and that the 240V end would be using more like 1.5A. So should I fit a 3A fuse to it? Here is a picture of the charger:

https://Upload the image directly to the thread.com/a/h0AfJIn

The plug cord itself (probably not the original one that came with the charger) is marked for 5A, which is one further consideration. I'm assuming it's OK to put a 3A fuse in a 5A rated plug lead, but can anyone confirm?

 

[Toneyz]

Because as I said:
As has been said before the fuse is for protection of the cable not the load on the end of it which should be internally protected.



Only 3 and 13 amp fuses are colour coded and officially recommended. The other sizes are black and not officially recommended.

Why are they not recommended?

 

[GeorgeCooke]

Why are they not recommended?

Ask the IET, not me.

 

[Toneyz]

Only 3 and 13 amp fuses are colour coded and officially recommended. The other sizes are black and not officially recommended.[/QUOTE]
Why are they not recommended?

Ask the IET, not me.

Where have you taken this info from?

 

[DPG]

Anthony, I believe it is BS1362 that now recognises just the 3A and 13A values.

 

[Toneyz]

Anthony, I believe it is BS1362 that now recognises just the 3A and 13A values.

Yes, your right there, only those two are in BS7671 same with MCB's are manufactured in other ratings. I have the 5A and 10A fuses with BS1362 I thought that just because of the max Zs are not published in BS7671 they are not non-compliant and not recognised.

 

[pirate]

Ok GeorgeCooke, you are right, I still do not understand. I accept that in many countries there are no fuses in the plugs. Here in Spain, everything is protected by breakers at the fuseboard, and no problems usually...so why have fused plugs at all? or plug tops or whatever they are called!

 

[Risteard]

so why have fused plugs at all? or plug tops or whatever they are called!

Because of 30/32A circuits. Essentially because of the ring final circuit.

 

[GeorgeCooke]

or plug tops or whatever they are called!

They are plugs. Plug tops are the top or lid of the plug.

 

[DPG]

Here we go again

 

[Moley]

As the BS1363 refers to them as a plug then that's good enough for me

 

[pirate]

Thank you Risteard! Precisely why radials are better...imho.
GeorgeCooke, I was just joking...whoever heard of pulling the plug-top?
Or maybe that's urban slang for something I don't want to know about...