Common symptoms
Tripping, overheating, failure to start, intermittent operation or alarms associated with submain cable faults.
What we check
- —Incoming supply and phase presence
- —Protective devices and settings
- —Terminations and thermal condition
- —Control circuit voltage and interlocks
- —Insulation condition of cables and windings
Scope of our service
Higher-risk LV switchgear and specialist protection work is carried out only by suitably competent and authorised engineers. HV equipment is outside our standard service.
Repair & restoration
- —Safe isolation and lock-off
- —Component replacement where appropriate
- —Testing and controlled re-energisation
- —Written report and remedial recommendations
Related services
Frequently asked questions
Is submain cable faults an emergency?
It is urgent if there is smoke, burning, heat, water near electrics, a shock, or loss of power to vulnerable people or critical equipment. If unsure, call us and we'll advise.
Can I fix it myself?
Resetting a device once is fine. Do not open consumer units or distribution boards, and never carry out live testing unless you are qualified.
Do you cover all of London?
Yes — we attend across Greater London, day and night.