How to replace a fuse in a plug

Replacing a fuse in a plug is a simple task but it’s very easy to make a mistake in the process which can lead to dangerous situations. We recommend that you do not carry out this task if you aren’t confident in dealing with electrics and contact a qualified electrician to carry out this work.
Domestic fuses usually come in the same size but with different ratings and they should be easily identifiable by their colour and the rating will be clearly visible on the fuse.

UK Plug Fuse colour guide
The most common type of domestic fuses are:

Rating Colour
3 amp Red
5 amp Red
7 amp Black
10 amp Black
13 amp Brown


(You can purchase these domestic fuses from website in packs of 10, 25 or 50)

When replacing a fuse in a plug, there should only be a like for like replacement. It is risky to change a fuse for either a larger or smaller rated fuse as this can cause the fuse to blow and damage the equipment itself. The fuse rating is set at a certain rating to ensure the correct amount of current is drawn and it doesn’t exceed the threshold. If this does happen, this can be a fire hazard and even cause electrocution.

Before you start changing the fuse, make sure that the plug is disconnected from the mains and then identify the type of plug you are working with. In the UK, plugs tend to come in two forms: standard plastic plug or moulded plug.

How to change fuse on a moulded plug

  • First step is to make sure that the plug is facing up with metal pins
  • Once you have done this you will notice a small rectangle in the centre of the plugs head. This area tends to be a different colour to the rest of the head
  • Simply take small flat faced screwdriver to one of the side of the rectangle and pull up to release from the head. The fuse will now be visible and held in place
  • Use the screwdriver to release the fuse also and pull it away with your fingers
  • Grab your new fuse, ensuring that it is a like for like replacement
  • Place the new fuse into the plugs head and cover it back up

How to change fuse on a standard plastic plug:

  • Ensure you the correct screwdriver to unscrew the screws in the plug. Ideally a flat head screwdriver is useful in this situation
  • Using the screwdriver loosen the screws in the plug so that the back of the plug is able to come away
  • Open the case and keep the back of the case with the screws aside to use later
  • You will find the fuse within the two metal holders inside the plug
  • Remove the fuse from the holders and insert the few fuse in. Making sure that this is a like for like replacement
  • Before reapplying the back of the plug in place, it is worth checking if the terminals in the plugs are tightly held in place. A loose connection in the terminals could have been the cause of the fuse blow due to it being overheating.
  • Place the back of the plugs head back in place and screw it in tightly
  • If the fuse blows again, it is most likely an electrical fault which has nothing to do with the fuse itself. In this case, we recommend that you call up an electrician to have a look at the issue.

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