Ealing to Laleham 275kV Cable Scheme

JSM was contracted by a UK Distribution Network Operator to carry out a fault investigation on the red phase of the Ealing to Laleham 275kV No.2 Feeder Network. The fault had been caused by a third party.

Scope of works:

  • Site mobilisation, inclusive of signing, lighting and guarding
  • Excavate and investigate fault position at point of impact
  • Hydraulic management
  • Carry out oil analysis through flushing of cable from feed positions at either end of hydraulic section
  • Identify circuit
  • Inspect fault and carry out necessary works
  • Return circuit to setting pressure
  • Investigate other excavation within confines of work
  • Liaise with TFL and Local Authority

The location of the cable fault was on the extremely busy junction of Dick Turpin Way and Great South West Road, adjacent to Hatton Cross Underground Station.

Once the fluid loss from the damaged cable was under control, the cable was cut and capped while environmental consultants were brought in to carry out bio-remediation works.

JSM faced challenges caused by the complicated location of the fault, however, JSM’s highly experienced managerial and operational team handled the repair with care and to JSM’s exceptionally high standards.

Challenges included the constant heavy traffic flow which was exacerbated by the unavoidable one lane closure during the works (the site was one mile from Heathrow Terminal 4). For the safety of both the workforce and the general public, the working area was boarded on the live traffic side in accordance with NRSWA (New Roads and Street Works Act). JSM’s in-house Street Works team managed the permits and worked closely with TFL and the Local Authority to ensure operations did not cause any unnecessary disruptions to the general public. This project exhibits JSM’s ability to perform in demanding environments that require efficient working.