How to safely isolate power

A Video tutorial on safe electrical isolation for your home

Hello there! I’ve put together this video to make sure that whatever electrical DIY you are proposing to do, you are safe and will not be in any danger. It’s a very important procedure and can actually be the difference between life and death in some situations, so pay attention! The procedure only takes a couple of minutes to complete so please make sure you carry out each step correctly and safely.

What electrical tools will you need?

  • Safety Lock Kit – Including a lock, a key, a danger label and the lock fitting

The safety lock kit can normally be bought as a package from any electrical wholesaler. It’s important to note how vital it is to keep the key on you at all times, no sharing.

  • A VDE Screwdriver

The most useful screwdriver for any electrician, make sure you grab one of these! Again, they can be found in any electrical wholesaler.

Step 1 – Switch off the circuit breakers and power switches

Simply turn off, one by one, the circuit breakers from left right, and finish by turning off the main power switches.

Unscrew the four corners of the consumer unit and slowly lift off the case.

After this you need to screw the safety lock fitting onto the main power switches, secure it tightly and make sure it isn’t loose.

Finally put the lock through with the danger label and make sure you keep the key on you at all times.

Step 2 – Testing the electricity is fully isolated by making sure there are no live electrical currents

Start by using your approved testers on the proving unit to make sure they read the correct output and are working correctly.

Remove the busbar cover carefully and slowly as there could possibly still be a live current.

Put one probe on the neutral conductor, followed by the other probe on the line conductor both under the main power switches.

Keep one probe on the neutral conductor and put the other probe onto the earth conductor.

Keep the probe on the neutral conductor and put the other prove onto the line conductor.

Return to your proving unit and test the current output to make sure you haven’t blown a fuse and everything has been isolated correctly.

If you are in any doubt, we strongly recommend you hire a qualified electrician

If you’re interested in finding out more about safe electrics, then take a look at guide for how to change a plug socket!

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