Underground Cable Fault? We Locate It Precisely and Dig Once in Dorridge

How Buried Cables Fail

Underground cable has a hard life, and faults develop in familiar ways:

• Garden tools — spades, forks and edgers are the number one cause: one stroke can nick the sheath or cut a conductor, and the fault may show immediately or months later as moisture works in.
• Moisture ingress — water entering through a damaged point or a poor joint spreads along the cable, corroding conductors and creating earth leakage.
• Rodent damage — rats and squirrels gnaw buried and ducted cable, and the damage is invisible until the circuit misbehaves.
• Frost and ground movement — freezing and thawing shift the soil, stressing cable and joints until a conductor parts or the insulation cracks.
• Old or undersized cable — cable buried decades ago, or never rated for its load, degrades and eventually faults, often at the worst possible moment.

What the Symptoms Look Like

A buried fault usually announces itself as a circuit that trips (especially in wet weather, when leakage is worst), an outbuilding or garden area that has lost power, or a supply that behaves erratically — flickering, weak, intermittent. Any of these with cable crossing open ground is worth investigating promptly: a nicked sheath that leaks today can short out or corrode through later, and a fault that grows under the lawn is harder to find, not easier.

How We Locate the Fault

We confirm the circuit is dead and safe to work on, then test from the ends: insulation resistance between conductors and to earth tells us the fault's character, and length-based measurements place it roughly along the run. From there we narrow to a precise position using section testing and, where the route allows, tracing equipment — the aim is to know within a stride where to dig before a spade touches soil. If your cable route was recorded when it was installed, that shortens the work considerably. You will be shown the estimate of where the fault lies and given a firm price before any digging starts.

How We Repair It

Small, clean excavations, exactly where the testing points. At the fault, the damaged section is exposed and assessed: a localised nick can often be cut out and the cable rejoined with a proper underground-rated joint; a longer or badly degraded section is replaced with new cable, laid at correct depth with protection where it needs it. The repair is sealed and rated for burial — never a taped joint in the ground — and the trench is backfilled and the surface made good. The full circuit is retested before power returns, and we record the new route for your future reference.

Aftercare and Prevention

Keep a note of where garden cable runs cross open ground — a simple sketch saved in a drawer saves hours if trouble ever returns. Before any serious digging or fencing work, ask us to mark or confirm the route; moving or protecting a cable beforehand is far cheaper than a fault callout after the spade has been through it. And if a circuit starts tripping in wet weather, treat it as the early warning this page describes rather than waiting for it to fail outright.

When to Call Us

Book promptly when an outbuilding or garden circuit has lost power for no obvious reason, when a circuit trips repeatedly with cable running underground, or when you have just completed garden work and the power has since misbehaved. Book urgently if anything is hot, smelling, or scorching, or if the RCD will not reset at all — switch the circuit off at the consumer unit if you can do so safely and call us the same day.

Book Your Underground Fault Diagnosis Today

We locate and repair underground cable faults across the West Midlands, with the test equipment to find them precisely and the kit to repair them properly. Call or book online and tell us what the cable feeds, roughly where it runs, and what started the trouble — if it failed right after garden work, say so, because that tells us where to look first. One visit, one hole, one proper repair.