Hi all,
Here's a little puzzle. Two domestic ring mains in a house, nothing special, MK consumer unit (early 1990s 32A MCBs on each ring). No load on either ring, everything turned off and unplugged.
Connect large drill to ground floor ring main. Fire up drill, everything is fine.
Connect same drill to upstairs ring main. Fire up drill, power trips out almost instantly. Not on the MCB for that ring main, but the main breaker for the whole house.
Exactly the same thing occurs with an electric planer, but connecting a 2.8kW kettle to either one leads to no problems at all. There's been no work done to either ring main since we moved in, and other than a couple of upstairs sockets that have obviously been replaced (different front panels) it all seems original from when the place was built.
Does anyone have any clues as to likely culprits?
Cheers!
Here's a little puzzle. Two domestic ring mains in a house, nothing special, MK consumer unit (early 1990s 32A MCBs on each ring). No load on either ring, everything turned off and unplugged.
Connect large drill to ground floor ring main. Fire up drill, everything is fine.
Connect same drill to upstairs ring main. Fire up drill, power trips out almost instantly. Not on the MCB for that ring main, but the main breaker for the whole house.
Exactly the same thing occurs with an electric planer, but connecting a 2.8kW kettle to either one leads to no problems at all. There's been no work done to either ring main since we moved in, and other than a couple of upstairs sockets that have obviously been replaced (different front panels) it all seems original from when the place was built.
Does anyone have any clues as to likely culprits?
Cheers!