Thanks Dave,
I was wondering whether that amount of resistance would trip the breaker. The electrician did say we had the perfect storm, a little bit of leakage in the wiring, a bit from appliances, and a breaker that trips low. That’s why he recommended RCBO breakers to spread the leakage.
However this morning, with the dryer unplugged the washing machine tripped it on switch on, then when the program started to run. I unplugged the 4ways feeding our router and Powerline units in 3 places, the washing machine ran, the dryer ran a load. Then I puta second load in the washing machine the dryer finished but I left it switched on, and the breaker popped again. I finished the loads and power seems stable. It seems like it’s nuisance tripping.
I think that I’m going to have to go ahead with the consumer unit changed to get rid of the dodgy RCD – it is 27 years old, and various places say they don’t last forever I just don’t want to get it done in the depths of winter, the previous electrician said it would take all day.
thanks again!