What AMP fuse for a 1200W PSU?

So I'm looking for a 10A (thanks guys) and found the following, but slightly confused as to its description as it mentions it has a 5A fuse and then mentions 10A too? Does this mean that the cable is rated to 10A but comes prefitted with a 5A fuse, thus I'm ok to replace the fuse to 10A and it'll all be safe etc..?

Product Description
FULLY MOULDED HEAVY DUTY MAINS/IEC LEAD. IEC mains lead with a moulded 5A fused UK plug top connected to an IEC 10A moulded socket. Length: 2m. Colour: Red.
 
This was in the extra info:

Fitted UK 3 Pin mains plug moulded with 5a fuse. Can be changed to higher rated fuse
Red Plug, Red Cable to Red IEC (Kettle) Socket 3 Pin. 10A
2 metre Power Cable can be used with Appliances that accept IEC socket mains input.
vStylish Red cable to fit with decor in the home.
CE Certified
 
Space Monkey said:
Ordered the OCUK 13A plug as it has a thicker cable and rated higher, and also bought some 10A fuses to use with it, hopefully this is ok to do? :)
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I'd think so, although I'm not an electrical engineer.

A fuse is basically an over-current / spike protection. If you over-spec your fuse, then you have a chance the PSU will short without tripping up the fuse, and then 'catch fire' / blow up / do some damage. But really, you should be safe with a 10A. It's mainly for power surges, as your PSU will have its own protections against over-current.

A 13A cable is just the max rated power than can go through the cable without risks, so that's OK. I don't think anyone would want to use a cable as a fuse.
 
A plug fuse is simply there to protect the cable, nothing else. (Exactly the same as the fuses or MCB's in your C.C.U)
It prevents whatever is connected to the cable from demanding more current then the CSA of the cable can safely carry.

/16th Ed.
 
Also bare in mind fuses arnt an exact science, depending on the make up of it a standard plug fuse could require 2 to 3 times its rated current before blowing in some situations depending on the burst time etc
 
stuie said:
Also bare in mind fuses arnt an exact science, depending on the make up of it a standard plug fuse could require 2 to 3 times its rated current before blowing in some situations depending on the burst time etc
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I believe (don't hold me to this, and it could easily be looked up for the exact figures I'm sure) that a British Standard rated slow burn 13amp fuse can allow 20amp for 30mins, but something like 20.5 and it has to blow in under 30s. This allows for current spikes without blowing your fuse, but doesn't give a high current for long enough for (correctly rated) cable to melt it's shield and catch fire.
 
Yeah, when looking into all this I came to the same findings, so I'm going to try the 13A cable with a 10A fuse for now, which going by the calculations should easily be enough.

It's funny, I never really gave any of this a single thought before as I've always used the supplied cable, it wasn't until I realised I only had a 3A fuse and cable spare that I thought that doesn't sound right, hence my journey here :)

Thanks all, really appreciate all the help :)
 
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