Thanks for your reply Ericmark. My consumer unit is an old style fuse wire type - no MCB's. how should I proceed with this system? Regards, Robdib. p.s. is the main isolator the on/off switch on the consumer unit?
I have three ring mains in my house. I have found that there is continuity(as tested with a multimeter) between earth and neutral on all three circuits. Is this a problem? If so, how do I fix it? Robdib