Hi guys, I have a concrete garage 30m away from my house. I also have a 20m and a 10m length of armoured cable. Can I put a junction box in another shed to connect the two and supply power to my garage or do I need 30m of cable? (Yes I know about the single spur from a ring) and it’s only going to supply one socket, hopefully alternating between a saw bench and a security light, unless of course that one of you puts me right on how I can terminate this connection. Thanks.