In conjunction with location devices and plans, trial holes by careful hand excavation are essential before beginning any excavation. Hand digging must continue until all of the cables have been found on the cable plan. If there is any doubt as to where the cables are located, stop work and consult with WEL.
WEL experts are available to indicate cable location using paint if required. While this provides a useful indication of the cable locations, those responsible for the excavation must also carry out all other precautions necessary to avoid injury and/or damage.
All cables should be considered as live and should not be used as hand or footholds by anyone climbing in or out of the trench, especially around cable joint positions. Special care should be taken when digging above or close to the assumed cable route.
Best practice hand digging is to expose the cable using the spade parallel to the cable not at right angles. Hand-held power tools or excavators should not be used within 0.6 metres of any underground cable. When a cable has been exposed by pot holing, best practice is to then dig away from the exposed cable, not towards it with excavators.
In the case of emergency works, every effort should be made to locate buried underground cables, prior to undertaking machine civil work. It should always be assumed that buried cables are present and that excavation work should proceed with extreme caution by careful hand excavation.
(Where plans are not available in a situation, only excavation by hand should be carried out, until the location of any cable(s) has clearly been established.)
If a buried underground cable suffers damage, however slight, WEL must be informed immediately.
Arrangements must be made to keep the public well clear of the area until the damaged cable has been repaired or otherwise made safe.
Back-filling of any excavation where cables have been exposed should only proceed following advice from WEL. Fill containing items likely to damage the cables, such as large pieces of rock and hard-core or other sharp objects, shall not be used. Cables should be backfilled with fine material such as sand.
Hard or sharp material such as pieces of rock, large stones, hard-core or surplus concrete, should not be tipped into open cable trenches. Advice on back-filling cable trenches should be obtained from WEL Networks.