Mains & Sub Mains Installation

Mains and sub-mains installation is the core electrical distribution work behind multi-unit commercial buildings and larger developments — the infrastructure that takes incoming power and distributes it safely and efficiently across an entire site or building.

This work typically comes up on new-build commercial developments, multi-tenant buildings where each unit needs its own metered supply, or existing buildings being reconfigured for multiple occupiers. It's specialist work that needs to be right from the design stage, since retrofitting distribution changes later is far more disruptive than planning properly first time.

We provide design input alongside architects, main contractors and developers where needed, not just installation once plans are finalised. On live or phased developments we coordinate around other trades and programme dates, and every installation is certified to current regulations before handover.

If your project also needs high-capacity cabling as part of the same works, see Heavy Duty Cable Installation — the two are frequently scoped together on larger developments.