Rural setting. Two adjacent houses from the same pole.
The one I've been called to has had intermittent tripping problems on the 100mA S type RCD, it's TT, since just before christmas.
Seems to be no rhyme or reason and consumer unit 30 mA RCD's (two) not affected.
Called in on Friday and tested the upfront and tripping times good, ramp tested at 60mA.
Disconnected the only circuit not covered by the consumer unit RCD'd (garage) and asked them to keep an eye on it.
Called Friday night and told me it's tripping again.
Asked next door, who are in the process of rebuilding, whether anything new about christmas time.
Seems they got a new induction hob with boost facility then.
Turned it on, pressed the boost and low and behold next doors S type tripped.
Seems to do it everytime.
Doesnt affect the premises RCD's (30mA's).
Any explanations?
Had a look at the pole can't see anything amiss.
Regards
George
