What happens if I put a 20 amp fuse in a 15 amp slot?

The 15 amp slot is designed for handling current upto 15 amps so if you put a 20 amp fuse in a 15 amp slot and draw a current greater than 15 amps there will be heating and other issues like molten insulation you can put a 20 amp fuse only if u know that u are not going to draw more than 15 amps.

What size fuse do I need for a 12 volt socket?

The fuse needs to be less than the current carrying capacity of the cable you are going to use which should be big enough for the load you are going to take. If we assume your load is 5 amps then the cable needs to be able to carry 5 amps, say 12 amps and the fuse would then be 10 amps.

What size fuse do I need for a 12v cigarette lighter?

Individual 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.

How many amps are there in 12 volts?

1 Amp
You have a 12 Volt power supply that delivers 1 Amp of current.

Where do fuses go in DC circuits?

Recommended practice is to place the fuse near the positive terminal of the battery, so the whole circuit will be dead if the fuse blows. (Of course, if the positive terminal is considered Ground, place the fuse near the negative terminal.)

How do you tell what size fuse you need?

The simple calculation is watts divided by volts equals amps. After you have calculated this, it is a simple case of adding around 10\% to the value and choosing the nearest fuse to match. This is a more precise method then just guessing should you require a 3, 5, or even 13 amp fuse.

What fuse controls cigarette lighter?

In most cases, cigarette lighter circuits use 15 amp fuses, but you can check the fuse box in your vehicle to be sure.

What fuse should I use for a cigarette lighter?

Ever wondered what the appropriate fuse amperage for a cigarette lighter is? Well, it’s recommended that you use an amp fuse with an amperage between 7 and 10, but never anything over 15.

What happens when a fuse blows?

​Before a fuse gets to blow, it comes with a rating in terms of current amperes. Whenever there is more current than the system would handle, then the fuse element would melt and thus disconnecting the current from flowing.

Can you use a low voltage fuse on a high voltage circuit?

However you cannot use a low voltage fuse in high voltage applications : it will still blow at (strictly, slightly above) its rated current, but may sustain an arc that a HV fuse would extinguish. So if a fuse is rated for 12V DC and 20 Amps, this would be equal to 240 Watts.

What is the power of a fuse at 20 amps?

Therefore since the fuse has resistance (R) it’s the current, which provides that power I^2*R. The voltage has nothing to do with it : at 6V, 12V or 240V, the fuse still blows at 20A.

How do you replace a blown fuse in a car?

If the fuse box is in a dark place, use a flashlight to locate the blown fuse. Remove the broken fuse and replace it. Using needle-nose pliers or some small tweezers, remove the broken fuse and in its place replace with a new fuse. Here is a quick video on how to replace the blown car fuse.