cable too short

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Hi all
just required a roller shutter with tube motor. door will be 4m high. cable is about 1.5 long. whats the best way to extend cable, so we can use control buttons from ground.
 
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What sort of cable is it? Could you post a photo of the cable with it's cores please.
 
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its a 4 core black that comes with the motor.dont have a picture at the mo. earth blue black brown.
 
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You'll have earth, neutral and two live connections (a brown and a black) for the two different phases of the motor operation: up and down. The cable will be something like 0.75mm-1mm CSA multicore. Use electricians BUTT Connectors which are crimped using a semi-ratchet tool like this. This will provide a strong and electrically safe connection for the cores, but you'll still need a secondary form of insulation to replicate what the sheath does. If you stagger the butt connectors then you can get a nice finish with heatshrink that makes a fairly compact inline connection overall. Alternatively you could always just bring the cable ends in to an IP junction box.
 
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You'll have earth, neutral and two live connections (a brown and a black) for the two different phases of the motor operation: up and down.

What if it is a ELV cable with data being sent from the controller to the motor?
 
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