I remain of the view that one should fit the fuse specified by the manufacturer, or the smallest rating that will enable the device to work.
Ten Amp Fuse in a Telly Plug (aka plugtop)
- Thread starter charliegolf
- Start date
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Why? 
To provide the maximum probability of protection to the appliance.
Would you replace an MCB for one of a lower rating if changing a cooker to an oven?
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The latter is, of course, what I've been talking about.
If, for whatever reason, the manufacturer specifies a fuse rating appreciably higher than that, do you feel that it would be reasonable, if one so wished, to exceed that 'minimum requirement' and to use a smaller fuse (which still "enabled the device to work"), on the basis that (as per your next post) that would "provide the maximum probability of protection to the appliance" ??
Kind Regards, John
That's a debatable one, since appliances get changed backwards and forwards. However, as I recently wrote, if I "re-purposed" an unused 45A shower circuit to feed, say, an immersion heater, I probably would replace the MCB with one of lower rating.
Kind Regards, John
I might, but unlikely.
If one wished to increase the probability of nuisance tripping beyond the probability that the manufacturer considered acceptable.
By 'nuisance tripping', do I take it that you are referring to the fuse blowing during normal operation?
If so, I did say " (which still "enabled the device to work") " and maybe I should have clarified for you that, by "work", I meant 'work without the fuse blowing during normal operation'!
You seem to have a lot of faith in what manufacturer's say. Do you really think that the manufacturer of the OP's 32" TV believed that there would be a significant risk of the plug fuse blowing during normal operation if it were rated less than 10A?
Kind Regards, John
John: Ok, fair enough - but that's you thinking like you are.
Stillp: Ok, that's honest, but why not?
I've been trying to think of an analogy but it's difficult with the oddity that is the British fused plug.
I think the nearest I can come up with is -
with the introduction of LED lighting, has it even occurred to anyone that it might do some good if the lighting circuit MCB rating was reduced to 1A?
Stillp: Ok, that's honest, but why not?
I've been trying to think of an analogy but it's difficult with the oddity that is the British fused plug.
I think the nearest I can come up with is -
with the introduction of LED lighting, has it even occurred to anyone that it might do some good if the lighting circuit MCB rating was reduced to 1A?
Yes, I do - at least the better ones.
I think it is quite likely that Samsung thought that, yes, depending of course on what you meant by "significant" and by how much lower the fuse rating might be.
Were you referring to my answer about the MCB for an oven? If so, I probably wouldn't because a) changing an MCB is harder work and more expensive than changing a plug fuse, and b) ovens are pretty rugged things that don't usually need close I²t protection.
Do you really think that?
Let's assume that it is an LED (32") TV, in which case it probably draws less than 50W (about 0.2A) during normal operation (most seem to be only a bit over 30W these days). Can you think of any mechanism whereby such a device would ever blow a BS1362 fuse of any rating (certainly 3A, although 1A would probably be fine) during normal operation??
So, to answer your questions, by "significant" I mean having a greater probability (EFLI won't like that!) than once in a blue moon and let's say a 3A fuse.
Kind Regards
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