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You can replace a higher rating fuse with a lower rating provided it works with the device without constantly blowing. So try the 30 amp fuse in your lawnmower and if it doesn't blow and the mower works okay, you are fine. If it blows you will have to go back to 40.

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Q: Can a 30 amp fuse replace a 40 amp fuse on a lawnmower?
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Can you replace a 15 amp fuse with a 30 amp fuse?

Not a good idea. The 15 amp fuse will be protection a #14 wire which is rated for 15 amps maximum capacity. By changing the 15 amp fuse to a 30 amp fuse you would then be allowing 30 amps maximum capacity on a #14 wire. By doubling the load the extra heat generated on the smaller wire could be enough to melt the insulation from the wire and that could cause the wire to short out. If the wire shorts out inside the wall it means the removal of the wall board to replace the wire to restore the circuit to an operational condition. The proper wire sizing for a 30 amp fuse is, #10 copper wire with an insulation rating of 90 degrees C.


Can I use a 30 amp fuse instead of a 40?

This is not a good idea to do. Sometimes just that little bit of extra current that the 45 amp fuse will allow to reach the 40 amp load might be enough to destroy the device.


Can 600v wire works 30 amp fuse?

What size is the wire? AWG 10, 600V is rated for 30 amps. Any AWG less than 6 would also be ok for a 30 amp circuit....


Is a 16amp fuse ok for water heater?

I've never heard of a 16 amp fuse. -I guess it depends where you are. In north America, 15, 20 and 30 amp fuses are common, 40 are also used less commonly. A typical north American water heater uses 2 x 30 amp fuses or breakers. Please write in with detail of WHERE you are in questions like this.


How do you replace a 15 amp circuit to a 25 amp circuit?

You have to rewire the circuit completely with 10 AWG wire and replace all outlets and switches with devices rated at 25 Amps. Note 25 Amp breaker is an unusual size. 10 AWG will go up to 30 amps, and that would be the way to go.

Related questions

Can a 25 amp fuse replace a 30 amp fuse in a central ac unit?

Yes, as long as it doesn't blow. You can always go lower with a fuse, but not higher.


Can you replace fuse 13 a 20 amp fuse with a 30 amp fuse in a 1997 Chevy silverado?

Sure.If you want a fire, that is!AnswerNo. A 30A will cook the wire before it pops.


How do you replace the fuse for a cigerette lighter on a 1995 Vauxhall Corsa?

Fuse 18 and its a 30 amp fuse, i hope you have sorted this as you will have no reverse lights aswell


Fuse for fan on 1999 Ford Escort?

I tis in the fuse block under the dash on the drivers side. Replace the 30 amp fuse marked Blower.


Can you replace a 30 amp fuse with a 15 amp fuse?

Not a good idea. The 15 amp fuse will be protection a #14 wire which is rated for 15 amps maximum capacity. By changing the 15 amp fuse to a 30 amp fuse you would then be allowing 30 amps maximum capacity on a #14 wire. By doubling the load the extra heat generated on the smaller wire could be enough to melt the insulation from the wire and that could cause the wire to short out. If the wire shorts out inside the wall it means the removal of the wall board to replace the wire to restore the circuit to an operational condition. The proper wire sizing for a 30 amp fuse is, #10 copper wire with an insulation rating of 90 degrees C.


My mercury manual says to use a 30 amp fuse for the blower motor however someone put a 20 amp fuse in. Would this cause my blower motor not to work?

The blower motor could stop working if it blew the 20 amp fuse. That's probably the worst that would happen. You should replace it with a 30 amp fuse, if that is what's called for in your manual.


Can a 30 amp fuse replace a 20 amp fuse?

NO!!!! The fuse is your safety device. Never replace a smaller fuse with a larger fuse.Another answerPeople who have done that in the past have burned down their homes. Changing from a 20 amp to 30 amp fuse puts 50% more current through the wire, overheats the wire and can result in fire. Don't do it. As the above post explains, the fuse is your safety device.To Ad:The above answers are dead on. Remember the fuse protects the wiring from overheating and catching on fire. A 20 amp fuse is used on 12 gage wire and a 30 amp fuse is used on 10 gage wire which is must larger. Never mix them up.To Ad: actually if you people wouldve took some kind of electical class its better to put a bigger fuse.. you just do not need to double the size.. if you got a 20 put a 30 in it it want blow.. if you put a 40 then you will have problems...


Can you put a 30 amp fuse in a 10 amp slot?

Not a good thing to do! If you are blowing 10 amp fuses, you have a problem with that circuit. Putting a 30 amp fuse in its place can do more damage.


What amp fuse is required for the heater fan in a 1978 Chevrolet Impala?

A 30 amp fuse is required.


How do you turn a 30 amp circuit into a 15 amp cicuit?

Replace the 30 Amp Breaker with a 15 Amp breaker.


1965 Chevy impala ss fuse box what amp is the fuse for the tail lights?

The 1965 Chevrolet Impala SS fuse box requires a 20 amp fuse for the taillights. A 30 amp fuse can be used when a 20 amp fuse is not available.


What does 30 amp CB fuse mean?

circuit breaker fuse