If a 30 amp blows you have a short somewhere. Depends for which circuit, you will have to track it from the unit back to the fuse.
You have a short.
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.
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.
Use a mini 30 amp fuse. If it blows then check for grounds with a test light. If know ground is present, then you can step up the amps in intervals of 5 amps until the fuse doesnt blow.
A 30 amp fuse wire typically has a diameter of around 0.08 inches (2 millimeters).
A 30 amp fuse is required.
I have vintage headlights converted to h4 halogen bulbs, my 30 amp fuse blows when i hit high beam, i was told to install a relay, hoe do i do this??
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.
circuit breaker fuse
What is the 40 amp RSI fuse in a Lexus rx 300 fuse box
This is a unclear question, and not easy to answer. In your fuse panal, their will be a range of fuses, from 5 amp, up to 30 amp. On your fuse panal cover, should be a digram of your fuse panal, and which amp fuse goes into which slot.