The Safest Way To Replace a Fuse on a Fuseboard

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Published: 24th November 2010
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Every house must have an up to date electrical fuseboard set up. In the UK it is known as an RCD unit or Residual Current Device. It protects the entire electrical system against any electrical faults something like an overload. The fuseboard usually consists of a mains lever, circuit breakers and a number of fuses. Every circuit breaker or fuse matches up to a certain area of electrical wiring within your house.

When an electrical fault occurs the circuit breaker would inevitably shut off or 'trip'. In an old fashioned fuseboard the fuse will 'blow'. The electricity source in that particular area of your house will be cut off, this protects against fires breaking out which is stemming from electrical overload. The drawback of the fusebox over a circuit breaker is that once a fuse blows, it needs to be swapped, but each time a circuit breaker trips, you simply have to reset it with the flick of a lever. Changing a fuse in an older style fuse board is what we'll be writing about here.

Of course, safety is the most important issue to think about whilst changing or doing anything in your electrical system. Shut down the mains switch at the board prior to changing a fuse. Turn off the lights and unplug any equipment which are supplied by that particular fuse. At all times, when you are changing a fuse, make certain to replace it with the exact rating. A fuse with a higher rating will permit excessive electricity to run through the circuit which may produce a fire as a consequence of an overload.

In cases where a fuse keeps blowing, get a qualified electrician in. Perhaps it's time to renew your switchboard with a modern RCD unit. Fuseboards are likely to be labeled to help you see which fuse protects which part of your house. However, in case your fuseboard does not have any tagging, have an electrician label it on your behalf the next time he is at your home. This information will certainly make it simpler for yourself in finding a blown fuse the next time it takes place.

Changing a blown fuse is quite simple. Follow these guidelines when changing fuses:

1. Switch off the main switch on your switchboard.

2. Switch off all of the lights and unplug any home equipment inside the affected part.

3. Check the labels on your switchboard. Take out the particular fuse that relates to the region in your property that ran out of power.

4. In case your switchboard does not have any labelling or if you have difficulty in locating the blown fuse, you may have to pull out and investigate every fuse until you discover the blown one.

5. The blown fuse will be fairly obvious as the wires inside will certainly have seperated when they burned out.

6. Ensure that your fuse is the appropriate rating. You will as a rule see the rating printed on the fuse itself. Ratings of lighting circuits range from 5 amps to 10 amps, 10 amps to 15 amps are for socket outlets, and ratings that are above 15 amps are for power hungry appliances like cookers.

7. Replace the fuse and switch the master switch on.

8. Test all the lights and appliances in the affected area of the house.

Finally, Congradulate yourself, you've successfully replaced your fuse.


I have always had homes that I own looked after by the exact same electrician london company and through the years they've saved me a lot of money, just by giving me some very useful advise.


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