# How do I know which fuse to use in my car?

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The most straightforward is to inspect the fuse itself, where the amperage rating is typically noted on or near the top of the fuse. The second is to check the fuse diagram in the vehicle, to understand which fuse type is in each slot.

## How do I know which fuse to buy for my car?

Look under “Fuses” in your owner’s manual for help finding your fuse panels. Most manuals have a diagram showing you where each fuse box is. Each fuse panel cover should have a diagram listing each device and the corresponding fuse.

## How do you work out what fuse to use?

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.

## Does it matter which way round a car fuse goes?

It doesn’t matter which end of the fuse holder gets used for going to the battery and which goes to the jack. Fuses don’t require current to flow through them in a certain direction so either way is fine. But typically line is the side that the power comes in on and load is the power going out.

## Which amp fuse do I need?

If it’s a rewireable type plug and the original fuse size fitted by the manufacturer is not known, the recommended method is to use the 700W rule: For an appliance rated as 700W or less, a 3A fuse should be fitted. For appliances above 700W, a 13A fuse should be fitted.

## What fuse do I need for 12v?

either expressed as amps, or wattage. if the device load is known in watts, divide the wattage by voltage-(i.e 100watts divided by 12v = 8.3 amps) -use 10 amp fuse.

## What are 13 amp fuses used for?

Plugs for appliances rated between about 700 watts and 3000 watts (the maximum rating of a wall socket) should be fitted with a 13-amp fuse (coloured brown). For example: 13A Fuse – Washing machine, dishwasher, microwave, kettle, toaster, iron.

## What does ACC fuse stand for?

For powering aftermarket add-ons, it would be nice to have access to switched power (ACC, or accessory power) so the devices can’t drain the 12V battery when car is off.

## How do you tell which side of a fuse is positive?

The end that is being supplied with power will be positive if you put a multi-meter across it, and the other end will be cold if you don’t. The hot end will be the same place if you turn it around.

## What are switch fuses?

Enclosed switch fuses are used as main disconnects and provide overload and short-circuit protection. The range of enclosed switch fuses goes from 20 to 800 Amperes (IEC), available for BS and DIN fuses.

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## Can fuses go either way?

They can be put in either way. One thing to note fuses have a voltage ratings. Fuses with different voltage ratings will fit into the same holder.

## Can you put a car fuse in upside down?

If you install it backwards, the fuse for the original circuit will supply power to both circuits, and then the power for the additional circuit will flow through fuse 2. Inserted backwards, both circuits are limited to the rating of fuse 1 (original circuit fuse). … Then each circuit is protected by its own fuse.

## Does an inline fuse go on positive or negative?

The fuses are placed in the positive lines from the battery and close to the battery. If a fault occurs on the line between the fuse and the load the fuse blows and current flow stops. A ground fault on the return line is unlikely to cause any problems as there is no significant voltage on it.