Question: Does Fuse Size Matter?

Can I use a larger fuse?

In general, NO.

Replacing a fuse with a higher-amp fuse is a very bad idea and can lead to fires.

Fuses (and circuit breakers) are rated such that they blow or trip before any part of the circuit gets to a dangerous current.

Fix the underlying problem, and you won’t have any more blown fuses..

What size amp fuse do I need?

Fuse ‘A’ must be rated to protect wire ‘B’. Any fuse rated at less than ~150 amps is sufficient to protect a 4g wire and the vehicle but I generally recommend a 125 amp fuse with 4g wire….Wire GaugeRecommended Maximum Fuse Size4 awg125 amps6 awg80 amps8 awg50 amps10 awg30 amps7 more rows

What happens if you put the wrong fuse?

Fuses are present to protect the components of the electrical system. Rather than destroying the circuit when there is a surge of power, the fuse blows to protect it. … If you use a fuse with the wrong amperage, the fuse won’t blow as intended, damaging the circuit and resulting in a much larger repair bill.

How many watts can a 5 amp fuse take?

Fuse ratings45 AMPFor circuits of more than 13kw (13000 w)13 AMPFor appliances between 700 and 3000w (3kw)5 AMPFor lighting circuits. The maximum permissible load of a lighting circuit is 1200w or 12* 100 watt lamps3 AMPFor appliances up to 700 watts, such as table lamps and alarm clocks3 more rows

Can I put a 3 amp fuse in a 10 amp plug?

The 13A fuse in place of a 10A fuse wouldn’t directly cause any problem – but then, if there’s a problem with the appliance you’re using, or if you plug in too many things and the current goes over 10A but under 13A, then under the new fuse the extension lead will keep working whereas the old fuse would have blown.

Why does my 15 amp fuse keep blowing?

Having too many devices plugged into a circuit is the most common cause of fuses blowing. … Another potential cause of fuses blowing is a short circuit. When a hot wire touches either the grounding pathway or a neutral wire, it results in the circuit shorting out.

What size fuse should I use?

Find the size of fuse by multiplying the amps required by the device (2) by 1.5. 2×1.25 = 2.5 then we will round up to the nearest fuse size (in multiples of 5 amps) which would call for a 5 amp fuse. Cross Reference that fuse size to verify that it’s below the Maximum fuse size called out by this chart.

Can you replace a 15 amp fuse with 20?

The answer: It’s possible, but not advisable without an electrician evaluating the situation. You should never just upgrade from a 15-amp breaker to a 20-amp one just because the current one is tripping. Otherwise, you may burn your house down via electrical fire.

How many watts can a 10 amp fuse handle?

1200 Watts10 Amps x 120 Volts = 1200 Watts.

How many watts can a 20 amp fuse handle?

For standard 120-volt service, a 20-amp breaker can support up to 2,400 watts on a single circuit. However, circuits should not be loaded to greater than 80 percent of their maximum capacity for long periods, which makes 1,920 watts the safe maximum for a 20-amp circuit.

Do fuses get weaker over time?

Fuses degrade with time and will eventually fail. A blown fuse does not always mean that there is something wrong with the equipment, and in this article we will show you how to replace such a fuse. However, do not keep replacing a fuse if it blows immediately after you replace it.

Is it OK to replace a 3amp fuse with a 5 amp fuse?

If the motor is increased to a 5 amp motor then a 5 amp fuse is ok. You could but you will risk damaging the device it is suppose to protect. Replace with the correct size fuse, if you are having a blown fuse problem you may have a short in the system. … If there is a short either will blow.

Does the size of a fuse matter?

As long as the conductors and loads are properly protected by the largest fuse, I don’t see any code issues. Even having the same size fuses does not mean that more than one fuse will open if there is an overcurrent condition.

What happens if the fuse is too small?

If the fuse is too small, it may blow when nothing is wrong and prevent the load from performing it’s function. If you use too small of a fuse/CB, you can get interruptions on on small loads depending on undersize you go. If you oversize your fuse/CB, you possibly could start a fire or damage equipment.

Can I use a 30 amp fuse instead of 20?

As one of my professors at Tech used to say: “Fuses are there to protect the wires, not you.” Replacing a 20A fuse with a 30A one will most likely result in a fire.

What happens if you use a lower amp fuse?

Do not use a fuse with a lower rating– don’t put a 20 amp fues in a 30 amp circuit–because it probably will blow prematurely. Conversely replacing a 20-amp fuse with one rated at 30 amps is dangerous because it may not blow soon enough and damage an electrical component or start a wiring fire.

What size fuse should I use for LED lights?

75mm is good for about 7.5 amps max. I generally like to have at least 100% extra rating so a 3 amp fuse max is what i would use. This should be plenty for 4 leds. If you have working leds but blow a 10A fuse i think your wiring needs checking and you will probably find your fuse is directly across the battery.

Can I use a 10 amp fuse instead of 15?

You can, it will may immediately blow, but it won’t hurt anything other than the fuse. … What you don’t want to do is use a higher amp fuse or something like a jumper wire. That could damage the wiring and start a fire.