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Extending a flex


This material is " for information purposes " only. Strict rules govern what electrical work can be done without notification and inspection. Read more...


In some instances, you may need to extend the flex on an appliance. It is best to remove the old flex and replace with a new one of the appropriate length. However this is not always suitable as it will require opening the appliance to connect the new flex. In this instance, you may use a special flex connector designed for the job.
Never use a flex connector where it may be possible for it to come into contact with water. They are not suitable in kitchens for example.
Always select additional flex which matches the type, size and rating of the existing. Never connect a three core flex to a two core.


Switch off the power at the socket and remove the plug of the appliance.


Preparing the connector
Open the connector by releasing the retaining screw. Inside you will see three terminals each with two connection points. You should also see a clamp at either end for securing the flexes.


Disconnecting the flex
Remove the plug from the original flex by unscrewing the two halves, releasing the flex clamp and disconnecting the conductors from their terminals. Put the plug to one side.


Preparing the flex
Hold the flex next to the clamp at one end of the new connector and assess whether the trimming of the wires needs to be adjusted to suit this new fitting. If necessary, trim back the sheath and insulation to suit.


Connecting the flex
Connect the brown (live) to one of the outer terminals. Connect the blue (neutral) to the other outer terminal. Unless the appliance is double insulated, in which case you should not have an earth wire, connect the green and yellow (earth) to the middle terminal.
Now, strip and connect one end of the new length of flex in the same fashion. The terminals are not usually labelled. Be sure to connect each of the conductors to the corresponding one on the other side of the terminal, ie. brown to brown, blue to blue, green/yellow to green/yellow.


Secure each flex in its clamp, double check all your connections and replace the cover with its retaining screw.
Prepare the other end of the new length of flex and fit the plug.




Trimming knife
Wire strippers
Insulated screwdriver







