Common questions

What fuse do I need for my computer?

What fuse do I need for my computer?

Plugs for appliances rated up to about 700 watts should have a 3-amp fuse (coloured red). For example: 3A Fuse – Table lamp, standard lamp, television, video, computer, mixer, blender, fridge, freezer, power drill, jig saw, soldering iron.

How do you choose the size of a fuse?

In order to select the right amperage of the fuse, you first need to know the full-load steady-state current of the circuit at an ambient temperature of 25º C (68º F). Once the current value is determined, then a fuse rating should be selected as to be 135% of this value (taken to the next standard value).

Is 13 amps enough for a PC?

A common question asked by PC users is how much is safe to plug into one 13A socket. It’s usually the plug which is limited to 13A, but most electrical devices – certainly anything PC related – is much more likely to have a 3A or possibly 5A fuse.

What are 20 amp fuses used for?

A 20-amp screw-in fuse is generally used for outlet and appliance circuits wired with 12-gauge wire. A 30-amp screw-in fuse is most commonly used for circuits supplying electric clothes dryers or air conditioners. These circuits are wired with 10-gauge wire.

Can I use a 5 amp fuse instead of 3?

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 amps does a PC take?

Ratings of commonly used household appliances

Domestic Portable Appliance Amps Used Watts Used
Desktop computer 3.0 700
Television 42″ HD 0.5 120
Games console 0.86 <200
Washing machine 10 2200

What kind of fuse to I need for my PC?

Then there is a professional electrical company who came into my place of work the other day to test a whole load of power cables, and said that a 5amp fuse would be the best versetile choice to fit into a power cable to use on both screens and PCs. So im getting mixed messages and just wanted some confirmation.

How do you choose the correct fuse size?

Identify the smallest gauge wire the load current will flow through. One common misconception about choosing the correct fuse size is that it depends on the load of the circuit. However, the load of the circuit is not suitable to use alone when choosing a fuse size. The fuse size should be based on the SMALLEST wire in the circuit.

How big is a domestic mains outlet fuse?

Single phase domestic mains outlet fuses only come in the three sizes, 3, 5 & 13. The electrical (like the one’s inside your PSU) Cartridge or pigtail fuses come in all kinds of sizes and rates. The lack of domestic mains fuse sizes has always annoyed me tbh.

Is the fuse size dependent on the load?

One common misconception about choosing the correct fuse size is that it’s dependent on the load of the circuit. Actually, the load of the circuit should have nothing to do with choosing a fuse size.

How do you calculate fuse size?

  • Identify the load current in the circuit. See this guide to learn how to calculate load current.
  • Identify the smallest gauge wire the load current will flow through.
  • Enter values in the calculator below

    What are the standard fuse sizes?

    Sizes and Specifications. Standard fuse sizes range from ¼” diameter, 5/8” length (1AG) to ¼” diameter 1” length (8AG), to 5mm x 20 mm, pico fuses and automotive blade. “Automobile Glass” fuses use the term “AG” in the fuse size designation.

    What is often used instead of a fuse?

    Today, circuit breakers are used in homes instead of fuses. The main reason is because a circuit breaker can be re-used. Once a fuse blows, it has to be replaced.

    What is the standard size of a fuse?

    There are at least seven different sizes of fuses with a 1/4 inch diameter. The fuses listed are the most common for the size, which is always a fast-acting fuse: 5AG size , type AGU, 1 A to 60 A, ​ 13⁄32 inch (10.3mm) diameter by 1​ 1⁄2 inch (38.1mm) long.

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Ruth Doyle