Northwick Park, Harrow Hospital Canopy Lighting

Case Study Contents

Nulectrics Ltd completed a commercial electrical installation at Northwick Park Hospital in Harrow, Middlesex. The project involved upgrading lighting for the hospital’s main entrance drop-off point, improving safety, reliability, and long-term performance.

Client and Project Overview

  • Client Profile: Large Organisation
  • Location: Harrow, Middlesex
  • Project Date: May 2022
  • Service Type: Commercial
  • Project: Northwick Park hospital entrance drop-off point
  • Main Products & Materials Used:
    • 20mm galvanised conduit

    • 20mm PVC-coated flexible metal conduit

    • 22 × NVC LED battens with corridor function

    • 1 × Photocell

    • 1 × Four-pole contactor

    • 1 × Schneider consumer unit

    • 1 × Metal IP-rated enclosure plus accessories

    • 7-core armoured cabling

  • Duration/Time to Complete: 2-3 weeks

Challenges and Technical Adaptations

The main challenge was working with the canopy frames, as the construction details were unknown until arrival. Proper earthing of the frame was also an issue due to the mechanical joints.

Solution:

  • Conducted R2 wandering lead tests to confirm continuity at each section of the frame.

  • Earthed the first canopy section, with galvanised conduit connections ensuring the rest of the frame was also properly earthed.

  • Designed the lighting system so both canopies came on together while being powered separately. This ensured backup lighting if a circuit developed a fault.

Project Summary

Nulectrics installed two separate lighting circuits within one multicore cable to provide redundancy. Both circuits are controlled by a single photocell and four-pole contactor, ensuring the canopy lights switch on together while maintaining backup in case of a failure.

All wiring was encased in galvanised conduit and flexible metal conduit, ensuring long-term durability and protection. This setup provided the hospital with a safe, reliable, and energy-efficient lighting system.

Conclusion

This hospital electrical project improved safety and resilience at the Northwick Park Hospital entrance. With durable conduit systems, redundancy across circuits, and energy-efficient LED lighting, the installation delivers both reliability and long-term performance.