# Question: How Do You Size A 12v Fuse?

## What size fuse do I need for 12v?

20 ampIndividual 12 volt accessories usually have fuses inside their cigarette plugs that are appropriately rated for the particular accessory.

The fuse in the plug will normally blow before the 20 amp fuse does.

The 20 amp fuse protects the wiring between the battery and the socket in case a short develops there..

## Can I use a 240v fuse in a 12v circuit?

Re: Is a 12v fuse the same as 240v 5A? Yes, it will be fine. Fuses sometimes have a maximum voltage rating that they can safely interrupt, but that’s a function of the distance between the terminals and the insulating material used. (For instance, most car-type blade fuses are rated for 32 volts.)

## How do you find the maximum fuse size?

The fuse rating can be calculated by dividing the power used by the appliance by the voltage going into the appliance. I (Amps) = P (Watts) ÷ V (Voltage).

## How do I know what size wire to use?

To determine what gauge wire you need, consider the carrying capacity and the amount of current the wire needs to conduct (measured in amperage or amps). Wire gauge is directly related to how many amps you need to run through it. The distance you need the wire to go can also impact the gauge of wire you need.

## What amp fuse do I need 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.

## What FUSE do I need for 240v?

100 Watts divided by 240 Volts equals 0.42 amps +10% which equals 0.46 Amps. So from this calculation the ideal fuse would be 1 amp. However most manufacturers put a 3 amp fuse in the plug as standard.

## Can you use AC fuse for DC?

AC fuses will work fine for DC circuits. They depend on a fusible link which simply measures current and melts if the current gets too high. It works the same for DC or AC.

## Which fuse is bigger AC or DC?

Hence, usually, the electrodes of the DC Fuses are placed at larger distance when compared to the AC Fuses. This will minimize the chance of arc and since the distance between the electrodes is increased, the size of the DC Fuses is comparatively large.

## Can I use a 3 amp fuse instead of a 2.5 amp?

Re: Radio calls for a 2.5 amp fuse. Can I use 3 amp? Yup. The fuse is there to protect the wiring and 3 amp is well within the supply wire’s capability.

## Can I use a 5 amp fuse instead of a 3 amp?

If the motor is increased to a 5 amp motor then a 5 amp fuse is ok. You can but you shouldn’t, it can cause wires to heat up and possibly cause a fire. You can replace a 5 amp with a 3 safely as long as you don’t exceed 3 amps.

## How many volts can a 10 amp fuse handle?

240 VoltsVolts = Watts / Amps 2400 Watts / 20 Amps = 120 Volts. 2400 Watts / 10 Amps = 240 Volts.

## How many watts can a 16 amp fuse take?

Your MCB can hold up to 16 Amps and the voltage applied will determine how many Watts. The formula is simply Amps multiplied by Volts equals Watts. In the case of a 120V supply this means 1,920 Watts for a 240V supply it will be 3,840 Watts.

## Can I replace a 10amp fuse with a 13 amp?

If you replaced it with 13A fuse, it will allow current more than 10A, so it may possible that other components may get damage due excessive current flow than specified. If TV components can sustain up to 13 A current, you can replace it. … You can put a smaller fuse in with the same “speed” rating.

## What are the standard fuse sizes?

Manufacturers have now standardised plug fuse ratings to be either 3A or 13A. However, 5 Amp fuses are still used in some older equipment and are available to buy….Guidance.Safety around the home.Plugs and Fuses.

## Which fuses are larger in size?

The largest size fuse shown in the chart is the 5AG, or “MIDGET,” a name adopted from its use by the electrical industry and the National Electrical Code range which normally recognizes fuses of 9/16” x 2” as the smallest standard fuse in use.

## What are the 3 types of fuses?

Different Types of Fuses – Constriction, Working & CharacteristicsDC Fuses.AC Fuses.Cartridge Fuses.D – Type Cartridge Fuse.HRC (High Rupturing Capacity) Fuse or Link Type Cartridge Fuse.High Voltage Fuses.Automotive, Blade Type & Bolted Type Fuses.SMD Fuses (Surface Mount Fuse), Chip , Radial, and Lead Fuses.More items…

## How do I know what size fuse to use?

B Calculate MINIMUM FUSE AMPERAGE by multiplying product amperage rating by 125%. Minimum fuse amperage provides more protection for the wire but may result in nuisance blows. Example: 80A x 125% = 100A. C Choose FUSE AMPERAGE near the middle of this range.

## What size fuse do I need for lights?

A lighting circuit is protected by a 5- or 6-amp fuse or circuit breaker. This fuse size allows bulbs with a maximum combined wattage of 1150 watts (5 amps x 230 volts) or 1380 watts (6 amps x 230 volts) to be run off the circuit.

## How many watts can a 5 amp fuse take?

1150 WattsIf your lighting circuit at home is protected by a typical 5 amp fuse you can multiply this by the voltage to get 1150 Watts.

## Can I use a 13A fuse instead of a 3A?

For an appliance rated as 700W or less, a 3A fuse should be fitted. For appliances above 700W, a 13A fuse should be fitted. … BS1363 has standardised on just two preferred fuse ratings, 3A and 13A, however any fuse rating up to 13A can still be used.

## How many amps is a 250 volt fuse?

Semiconductor Fuse – 250 Volts The 250 volt semiconductor fuse is a current limiting, very fast-acting, fuse rated to 250 volts AC and up to 250 volts DC. Current ratings range from 1 to 2,500 amps. The maximum interrupting rating, is 200,000 amps AC and 100,000 DC.