I have a cable coming from my garage (in a block, 100yds away) to my front
door. Trouble is, that's where it stops and it's a good 3 metres away from
the meter/consumer unit. I want to extend the cable to reach the consumer
unit. It will be buried a good 18 inches down. so I'm wondering what the
best way of joining the cable would be? Would using a waterproof junction
box with a terminal block to join the cables be ok, or is there some other
method ?