Failure to do this correctly can cause issues when trying to sell your home and can even invalidate your home insurance! With the old switch out of the way, take your new dimmer switch and connect the wires in the same place as the old one; brown live to COM and blue switched live to L1

Fitting a dimmer switch in place of an existing standard light switch is a fairly easy and straight forward job as long as you know what you are doing. However, if it is to be a newly installed switch where all wires and cabling needs to be run from scratch then this is not possible to do as a DIY’er and can only be done by a Part P registered electrician with the knowledge and skill to do the work correctly, test it fully and then issue a minor works certificate.In accordance to the Building Regulations and the BS 7671 wiring regulations, if you are simply exchanging an existing standard 1 or 2 gang light switch for a dimmer switch then this is entirely possible to do on a DIY basis, as long as you have the knowledge to do so. A leading edge dimmer cuts the front off of the second part of the wave cycle, where as a trailing edge dimmer cuts the second part of a waves cycle. In this DIY guide we look at how to fit a dimmer switch in place of a standard light switch. Regulations for Fitting Dimmer Switches

Once the power to the circuit and switch are isolated, the next job is to use a flat blade screwdriver to unscrew the 2 screws on the front of the faceplate.

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Modern dimmer switches use this cycle to determine when to turn the light off. At the point that the switch from positive to negative happens there will be zero voltage and this is when the switch cuts the power. Aside from the main differences in how they operate, dimmer switches are also available in several different operation: our dimmer switches have a soft start function that slowly brings the lights to the set level in about 1-2 seconds, prolonging the life of your bulbs To get it to sit flat, you may need to give it a little wiggle so that the wires find their own natural resting place.