How to replace a blown fuse in a consumer unit
Blown fuses are extremely common, but luckily, the fix is incredibly simple, meaning that you’ll have your consumer unit back up and running in no time at all.
What causes a fuse to blow?
Although the most common reason for a fuse tripping or blow is usually an overloaded circuit, there are many other reasons as to why this could occur, including:
· Ground Faults
· Damaged wiring or outlets
· Moisture build-up
· Wrong type of fuse used
· Arc issues
· Circuit or Breaker issues
To ensure that you don’t end up with a blown fuse due to the wrong type being used – you can find out which one you need for a number of appliances here.
How to identify a blown fuse
To ensure that you are removing and replacing the correct fuse, you can identify the blown one by checking for:
· Cloudiness
· Discolouration
· Melted or broken metal elements inside the fuse
How to replace a blown fuse
Fixing a blown fuse in a consumer unit/fuse box can be a very simple process, providing it is done correctly, and most importantly safely.
What you’ll need:
While replacing a blown fuse does not require any additional tools to actually do the job, ensuing you’re using the correct safety equipment is vital, these include:
· Gloves specifically designed for electrical work
· Rubber soled shoes
· Safety goggles
Step 1:
Although it may seem obvious, as well as using the safety equipment specified, it is vital to take all necessary precautions before handling anything electrical.
This includes ensuring that your hands are dry, that you are standing on a dry surface, and that all jewellery is removed.
Step 2:
Next, you must disconnect the mains power to the consumer unit, then locate the blown fuse.
As well as the visual signs to look for when identifying a blown fuse, you can narrow down the location of the faulty fuse by checking the labelling that corresponds with the part of the building that lost power.
Step 3:
Now it’s time to carefully unscrew the blown fuse, remove it, then replace it with a new one.
As previously mentioned, you must use a replacement fuse of the same type, but it must also be the same rating, size and amperage. Using a fuse that is not compatible with your system can cause a multitude of issues, even as severe as electrical fires.
If you have any uncertainties regarding the replacement of a fuse, the best course of action is always to consult a professional.
Step 4:
Finally, you can turn the mains power back on and test if the new fuse works.
If the new fuse blows just by turning the mains power back on, you must consult a professional to carry out a proper inspection to possibly identify a bigger issue within your system.
If the new fuse blows after plugging in appliances in the area controlled by it, you either have an issue with the appliances themselves, or the fuse is being overloaded with appliances that are too powerful for the fuse to handle.
If carried out correctly and safely, next time you experience a blown fuse, you can quickly and effectively fix the issue, resulting in a full operational electrical system in any home or business.
