Carrying on from my other post regards type of conduit to use.
I’ve got a job to install an outside socket for a client, where I need to spur off from a living in groom socket, run mini conduit from socket on adjacent wall to wall where outside socket is being fitted. But the socket I’m spurring off is a metal back box in the wall. So what is the best way to bring the spurred cable from this socket in to the mini trunking, without causing too much damage to the wall?