I stupidly drilled through what I think is my alarm cable because now my keypad is dead,the wire is under the plaster.how can I repair without replastering and can the cable be joined.

Driller, December 2012

remove the mains power before you open the panel

gts, December 2012

you will need to cut the wire from the plaster,or,run a new cable to the key pad,and chances are you have blown a fuse too,yes the cable can be joined,just join colour to colour,we would norm just run a new cable,
but you cant be bothered then join the cores and solder each one then wrap in tape

gts, December 2012