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Global Rail Construction Ltd is a Principal Contractor and a leading UK provider of design and build services to clients in the rail and transportation sector.

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01 Jul 2022

South Harrow TfL Contract Award

Our UK team has been awarded a fully managed, turnkey M&E design and installation project for Transport for London (TfL) at South Harrow Depot. The scope of works consists of the following items:

  • LV DNO power distribution from South Harrow Station E4 Switch room to South Harrow Sidings LVAC panel
  • Provision of containment within Sidings boundary to route the LU power supply from Sudbury Hill to South Harrow Sidings LVAC panel at the later stage (Power supply design by LU Power Projects team)
  • Design, test and commission of LVAC panel which comprises of a section of panel from DNO distribution that provides power to Points Heating distribution; and a section of panel with Auto Transfer Switch arrangement with dual supplies from DNO and LU to feed the Points Motors power distribution Lighting Kiosk and existing Comms 6kVA UPS for CCTV load
  • 2No IMD (Insulation monitoring device) for isolation transformers shall have power supply from local DB via 3 phase 6A MCB
  • Design of On Train Control (OTC) PSU unit’s supply as per Communication specification (UIP3230-TFL-COM-P094-DRG-CO-00001).
  • Design of lighting kiosk which comprises of lighting DB, lighting contactor panel and override push button station
  • Design, test, and commission lighting control panel
  • LV Cabling and Containment
  • Effective sustainable lighting to comply with S1066 and compliant with ECA directive
  • Emergency lighting to comply with S1066 and BS5266 – With integral battery backup within luminaires
  • Lighting Controls – Photocell control at central location with override push button station on timer controls at central Lighting Kiosk location and remote push button station at 3 locations as shown on the design drawings
  • 230 / 110V combined transformer 110V Socket at LVAC Kiosk location for maintenance tools
  • Earthing and Bonding
  • Liaising with supplier for LVAC panel, lighting control and isolation transformer
  • Surge suppression devices for the panels including all the distribution boards
  • Testing and commissioning for all the installed assets

South Harrow Sidings is being remodelled as part of the Deep Tube Upgrade Programme (DTUP), Piccadilly Line Upgrade Project (PLU), from 6 No. to 12 No. siding roads. To accommodate the revised stabling capacity and associated remodelling requirement, GRCL will deliver a revised LVAC and Site Wide Lighting supply to power new assets and illuminate walkways, assets and Driver Access Platform (DAPS) as well as install, test and commission a new LVAC panel, lighting control system, power supply to point motors and point heating system.


Global Infastructure Group
Global Rail Construction
Units 18 & 20
The io Centre
Hearle Way
Hertfordshire, AL10 9EW
+44 (0) 870 990 4074
Registered in England 04272798
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