A national last-mile delivery operator was converting its Edgware depot to an all-electric fleet. Twelve 400kW ultra-rapid chargers had been specified — but the existing LV intake was already maxed out, so the project required a new 11kV supply from the local DNO and a new packaged substation inside the depot perimeter.
We were appointed as the principal cabling contractor: HV cable from the DNO point-of-connection to the new packaged sub, LV distribution to each charger bay, joints, terminations and associated civils.
What the job involved
- 120m of 11kV cable pulled from the DNO sub on an adjacent street into the new packaged unit.
- 180m of LV distribution to twelve charger bay positions, in multi-way duct bank.
- Pre-cast joint bays for HV terminations and LV inline joints.
- Reinstatement to depot yard concrete spec, including kerb replacement.
- Liaison with the charger installer for handover-ready bays week by week.
Key challenges
- Depot remained operational for ~80% of vehicle movements throughout — phased temporary fencing each shift.
- 11kV pull went through a section that hadn't been laid as designed — duct re-route required mid-job.
- Charger commissioning team needed power test bays ready ahead of programme — we accelerated three bays.
Outcome
- All twelve chargers live four days ahead of the depot's electrification deadline.
- DNO HV connection live two weeks ahead of programme thanks to early jointing slot.
- Operator extended our scope to cover their next two depot sites the following month.
It's not just about laying cable. They handled the DNO, our charger guys, our facilities team and our health & safety review without me having to broker any of it. Cleanest project I ran last year.
— Fleet Electrification Lead, Edgware, North London
Need something similar?
If you're planning a ev charger cable installation job across North London or the Home Counties — talk to us about scope, sequencing and a price. We work directly with DNOs, ICPs, main contractors and developers.