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Birmingham City Council

Street Lighting - Service Duct Requirements

Street Lighting

Service Duct Requirements

  • Unless otherwise stated, all service ducts supplied by the Developer shall be Low density polyethylene (PE) and shall comply with Clause 501 and Table 5/2 of the Dept. of Transport Specification and shall be compatible with any drawpits proposed by the Developer. All lengths shall be fixed socketed at one end and shall have a smooth bore across the push fitted socket joint.
  • The 100mm / 50mm diameter ducts intended to contain street lighting sub circuits which will, upon completion of the works, become the responsibility of the Authority shall have a minimum wall thickness of 4mm, be orange in colour and have the words “Street Lighting” embossed printed 9mm high, along the length at intervals of not more than one metre. All ducts shall be fitted with a single draw rope.
  • The 100mm / 50mm diameter ducts intended to contain Distribution Network Operator cables which will, upon completion of the works, become the responsibility of the Distribution Network Operator, shall be Black in colour and comply with Electricity Supply Industry Specification 12-24. When laid the wording shall be uppermost. All lengths shall be properly jointed and sleeved to give a smooth bore. All ducts shall be fitted with a single draw rope.
  • All ducts shall be laid in a trench depth to invert 750mm in roadway construction and 450mm in footway construction.
  • 90 degree bends of 250mm radius, fixed socketed at one end, the colour shall be compatible for use with the duct on offer.
  • Where duct trenches are dug in existing carriageways the existing road construction shall be saw cut full depth at each side of the trench.
  • Duct excavations shall be backfilled in accordance with the New Roads and Street Works Act 1991 – Specification for the reinstatement of openings in highways.