Samuel Verrall
Hi Patrick, Highly recommend an electrical installation condition report carried out to your property, which is basically an MOT for your electrical installation, which will flag up any issues which don't meet current regulations. Common issues: *insulation resistance faults which will cause new RCD to operate * main protective bonding conductors not present or undersized (e.g gas and water services) * continuity issues with ring and radial circuits Etc Hope this helps. All the best City Electrical Services Sam