COMMERCIAL ELECTRICAL

Three-Phase Power Installation, London & Essex

Stern MEB installs, upgrades and certifies three-phase power supplies across London and Essex. From Woodford Green (IG8), we deliver fixed-price installations with full NICEIC certification and a free site survey. Whether you're powering industrial machinery, EV charging infrastructure or a commercial kitchen, we size the supply correctly the first time.

Book a free site survey
0800 612 7654
OZEV Approved Installer
NICEIC Approved Contractor
£5M public liability insured
20+ years’ experience

commercial electrician services in London & Essex, by Stern MEB

NICEIC Approved Contractor
NICEIC Domestic Installer
OZEV Approved Installer
TrustMark
CHAS Accredited
WHAT WE INSTALL

Three-Phase Power Solutions Across London & Essex

We handle the full scope: new three-phase supplies from the DNO, distribution board upgrades, load balancing and fault-finding on existing installations. Every job is tested, certified and signed off to BS 7671.

Commercial installations

Full-service commercial electrical from design to certification.

  • New-build fit-outs
  • Sub-mains & distribution
  • Lighting design & install
  • Compliance handover packs

Maintenance & testing

Reactive call-outs and planned PPM contracts to keep buildings running.

  • Emergency call-outs
  • Planned maintenance contracts
  • Fault finding & remedials
  • EICR + PAT testing on schedule

Specialist services

Data, CCTV, access control and emergency systems integrated cleanly.

  • CAT5e/6/6A data cabling
  • CCTV & access control
  • Three-phase power
  • Standby & UPS power
Why Stern MEB

Why Businesses Choose Stern MEB for Three-Phase Work

London and Essex present a mixed estate: Victorian industrial units in E17, modern business parks around the M25, retail units on high streets, and converted warehouses in IG11. We've worked across all of them, and we know the DNO processes, the building constraints and the load calculations inside out.

NICEIC-Approved & Fully Certified

Every three-phase installation is tested to BS 7671, signed off with an Electrical Installation Certificate, and notified through Building Control. No shortcuts.

DNO Liaison & G99 Applications

We handle the paperwork with UK Power Networks, including G99 applications for embedded generation or high-load connections. You don't chase engineers or wait weeks for a callback.

Load Calculations & Future-Proofing

We size the supply for what you need now and what you'll add in two years. That means correct cable ratings, protective devices that won't nuisance-trip, and headroom for expansion.

Based in Woodford Green, Covering London & Essex

Our engineers travel daily across the region. We know the trading estates around the A12, the industrial zones in Barking and Dagenham, and the commercial strips in Ilford and Romford.

How it works

From first call to certificate, four clean steps.

1

Brief

Tell us your address, scope and any deadlines via the form or call the office.

2

Survey

Free site visit (or remote photos for simple jobs). We confirm scope and route.

3

Install

Carried out around your operational hours. Site-clean, dust-managed.

4

Certify

NICEIC certificate, building notice where required, then aftercare on call.

Where we work

London & Essex and the surrounding area

Stern MEB operates from Woodford Green (IG8), with straightforward access to the A406, M11 and A12. That puts us within 30 minutes of most London and Essex commercial sites, from Stratford to Chelmsford, Barking to Enfield.


We cover all London and Essex postcodes, handle multi-site rollouts, and coordinate with landlords, managing agents and DNO engineers as standard.

Common questions

London & Essex FAQs

How long does a three-phase installation take in London or Essex?+
A straightforward upgrade, new consumer unit, tails, earthing, usually takes one to two days once the DNO has connected the supply. If we're applying for a new three-phase service from UK Power Networks, allow four to eight weeks for the DNO to quote, schedule and install the cut-out. We manage that timeline and keep you updated.
Do I need three-phase power for EV chargers?+
Not always. A single 7 kW charger runs fine on single-phase. But if you're installing multiple 22 kW chargers or a commercial fleet setup, three-phase is essential to balance the load and avoid overloading one phase. We assess your incoming supply during the free site survey and recommend the right configuration.
Can you upgrade an existing three-phase board without a full rewire?+
Often, yes. If the existing cables are sized correctly and in good condition, we can replace the distribution board, add RCBO protection, and rebalance the circuits. We test insulation resistance and loop impedance first to confirm the install is safe to extend.
What's involved in a G99 application for three-phase power?+
G99 covers any generation or storage connected to the grid, solar, battery storage, or high-load equipment that might export. We submit the application to UK Power Networks, provide single-line diagrams and protection settings, and liaise with their engineers. Approval typically takes four to six weeks, and we don't start the physical work until it's granted.
Ready when you are

Get a Fixed-Price Quote for Three-Phase Power in London or Essex

Call Stern MEB for a free site survey and a written quotation with no surprises.

Or call us directly
0800 612 7654
  • Free site survey
  • Fixed-price quote
  • NICEIC certificate
  • 12-month workmanship warranty

Book a free site survey

London & Essex · same working day response