I used to have an apprentice that used to use a pre-shorted plug that he used to plug in to trip the CB.
One day he took out the whole house when he never checked the switchboard and it had old porcelain fuses and the pillar box fuse out at the street blew first.
I made him pay for the cost of the Faultsman to replace the fuse.
I don't really like the idea of using a dead short to find a circuit, it doesn't sound too safe to me, I mean, what say the breaker that supplies that circuit is faulty and won't trip?.
