On Thursday, November 22, 2012 10:48:18 AM UTC, Doctor Drivel wrote:
"whisky-dave" wrote in message

...



The fuses are designed for fault current, which means, as

one poster in the link stated a 3A and 13A will break as quick as each

other - on a fault.



really ?



He did.



A 3amp fuse will break as quick as a

13amp will iof you pass 15 amps through it I don;t think so.



Keep up sunshine.

I've already passed you.




I only scanned the link, but one poster I think was saying have all fuses

13A. So if he had a lamp with 0.25mm flex and 13A fuses he thinks he is

safe. OK on a lamp it is difficult to see how the current would be great

enough to melt the cable as the bulb would blow way before any current is

dangerous enough.



Unless somethijng shorts circuits the buld of course.



..and then the fuse breaks.

Only if the fuse is of a lower rating than the cable.
you might fidn a 3 amp cable gets hot before the 13 amp fuse blows.



The secret? As fuses have dropped into 3A and 13A in common use (Only

specialist outlets sell anything else these days) never install flex that

is

rated less than 3A



Unless yuo need to.



Pay attention. Then you use fuses other than 3 or 13A

Which are availble.



and fit correct sized fuse to protect the cable. The

cable should never be rated less than the fuse.



Some fit larger rated fuses because of surge.



Which is wrong.

No it isn;t .


If there is surge then fit

anti-surge fuses, not a large rated fuse.



Which is right. Good you are catching on.

But you can't buy such fuses for the standard 3 pin plugs.



A while ago I brought some 20mm 32ma slow-blow for a piece of euipment.



Good you are catching on.

Yep I know what I'm doing you clearly don;t if yuo'd put a 5 amp fuse in a 1kw fire.