carnt find 40 amp fuse wire to buy any were please help?

Answer 1

I don't have the exact size for 40a, but 45amp tinned copper fuse wire is 1.25mm dia.,= 1.26²mm, so you would be safe using a piece of copper stripped from a piece of 1.0²mm cable (30amp is 0.85mm dia = 0.57²mm)

You would also be better to replace with an MCB if possible.

>>Why should I have three thumbs down for this answer, its accurate and should be helpful.<<

Answer 2

there is no such thing as fuse wire, forty amp or otherwise. if you mean a fusible link, forget it, they are more trouble than they are worth. a forty amp fuse would require at least ten gauge wire, if that is what you mean. You might get by with 12 but ten would be the least I would use. More likely, I would use 8 gauge. Whenever possible, use stranded wire rather than solid. Why? several reasons: it can carry more current, since the electricity travels on the surface of the wire primarily, stranded has more surface area. It is more flexible, and will go where you need it to easier, and a by product of having more surface area is that the wire stays cooler than solid with the same current load.

Answer 3

45 Amp Fuse

Answer 4

Are you looking for wire that will carry 40 amps or are you looking for a 40 amp fuse, or a 40 amp breaker?

Answer 5

The previous answerer is mistaken. The original 100A Wylex consumer units with rewireable fuses had a dedicated slot for a 40A circuit with silver contacts. The other slots all used copper contacts which had a maximum rating of 30/32A per circuit.

There's usually a little guide to the size of wire you need printed on the inside of your fuse(s) cover. You may be able to get it from an electrical wholesaler or scrounge it from the bods hanging around at the counter.

Otherwise, you can always whack in a plug-in replacement which has a flick switch on the front such as these:
http://www.screwfix.com/app/sfd/cat/pro.jsp?id=77992&ts=18620

Answer 6

DO NOT DOUBLE UP WIRE - get a plug in MCB which replaces the original cartridge wire type fuse. This now trips rather than melts the wire. Make sure you switch off mains before any work and if you donot understand get a sparky.

Answer 7

Do not double up on fuse wire. You obviously have no idea what you are messing with. You could be contravening the new laws regarding electrical installation. 40 amps is very powerful and it would be extremely dangerous to cowboy repair it. Consult an electrician before you kill yourself.

Answer 8

It's a long time since I had rewireable fuses, and I've forgotton the values they come in, but if you can get 20A fuse wire, use two lengths of that, side by side. Or eight lengths of 5A wire, side by side. Or one length of 20A and four lengths of 5A , all side by side - you will have got the picture, by now, I'm sure - it has to add up to 40.
But, as has been said, there aren't many domestic appliances (other than very heavy-duty showers) which draw so much current that a 40A fuse is needed. - you are talking of around 9 kilowatts. Glad I don't have to pay your electricity bill!

Answer 9

Just go out and get the modern industrial type 40 amp fuses. They are about the shape and size of roll of nickels and have opaque cylinder unlike the 3AG type fuse. Hacksaw off the end caps, it's easy because they are soft copper caps. Wala, you got fuse wire. Not long enough? Solder two pieces together. The solder will not alter the safety of the fuse.

lightpulse

Answer 10

40 amp fuse wire was never made for household use, only 5,15,20 and 30 amp, by the time 40amp fuses came into effect in domestic consumers units for cookers and showers etc. they were all cartridge type fuses and now mcb's or rcd's

Answer 11

maybe you should tell us what you are using it for hope your not making a fuse like everyone is thinking.Do you need 40 amp is that what the appliance calls for or ?