Overhead Line and Linesman Insurance

The most important thing about overhead line safety is also the most counterintuitive: a circuit that has been switched out can still hurt you.

Induction is the main mechanism. A conductor running parallel to a live circuit, particularly over a long span or alongside a transmission route, picks up voltage by induction, and that voltage is sufficient to injure or kill. Earthing at the work position is what addresses it, rather than earthing somewhere along the route. The other mechanism is re-energisation: a switching error, a wrong circuit identified, an embedded generation site exporting into a supposedly dead network, or a transformer back feeding. Embedded generation has made this materially less predictable than it was a decade ago.

So the controls are the ones the industry has built around: a permit regime with identification of the correct circuit, proving dead at the point of work rather than relying on a switching record, earths applied at the work position and on both sides where required, and nobody working on a conductor they did not personally see proved and earthed. Expect an insurer to ask about the permit system, the competence authorisations your people hold, and how embedded generation is identified before work begins.

Damage in this trade is unusual because the asset is a network, and damaging it affects people who have no connection to the work.

A conductor brought down, a pole struck, a circuit wrongly switched, or a fault introduced during work takes supply from customers. That is thousands of homes, a hospital, a water pumping station, a factory with a process that cannot be interrupted, or a street of shops with freezers. The network operator's own costs and penalties follow, and they can far exceed the cost of the physical repair. In extreme cases a conductor on the ground is a public safety incident as well as an outage.

So the exposure is consequential rather than physical, and the cover has to reach it. Establish how the policy treats damage to the network and the resulting outage, including the network operator's costs, because a wording written around property damage may not contemplate a loss made up of other people's lost supply. Practically, the controls are circuit identification, switching discipline and a conductor handling method that does not rely on everything going right, because a dropped conductor is both an outage and a danger.

The physical work is at height on structures of varying age and condition, with conductors under load, and the failures are mechanical rather than electrical.

A wood pole may be sound at the top and rotten at ground level, which is why pole testing before climbing exists. A tower is a climb with fall arrest on a structure that may have corroded members. Conductors are strung and tensioned with winches and tensioners, storing substantial energy, so a fitting failure, a broken insulator, a dropped tension or a conductor released unexpectedly is a mechanical hazard across a span. Add weather, which is when fault response happens.

So the controls are structure assessment and tension management. Poles tested before climbing rather than inspected visually, towers assessed for condition with an alternative access method where there is doubt, fall arrest used on every climb rather than on tall ones, tensioning planned with calculated loads and the right fittings, exclusion beneath spans being strung, and a defined position on working in weather during fault response. A business that will stand a fault job down until daylight in bad conditions is making a defensible decision rather than a slow one.

Overhead lines run across land that belongs to other people, and a surprising share of this trade's disputes are with landowners rather than clients.

Access to a pole or a tower means crossing a field, a garden, a yard or a wood, frequently with vehicles and plant. The realistic grievances are a crop driven through, a gate left open with stock escaping, ruts in a field, a fence cut and not properly reinstated, trees felled beyond what was agreed, and a track left in a state. None of it is dramatic and all of it generates complaints, claims and in some cases a refusal of access next time, which is a commercial problem for the network operator as well as for you.

So the landowner relationship is part of the job. Access arranged and confirmed rather than assumed from a wayleave, a record of the condition of tracks, fences and gates before and after, gates closed as an absolute rule, matting where ground is soft rather than driving through, reinstatement agreed in writing including what a restored field means, and a named contact for the landowner. Where vegetation is being cut, agreement on extent beforehand prevents the commonest dispute in the trade.

The outage is the exposure people underestimate. We are an FCA regulated broker and will not tell you we are the best choice. These are the questions that decide it.