A commercial electrical inspection keeps your building safe, compliant and running without nasty surprises. But if you've never seen one carried out, it's hard to know what an engineer actually checks. This guide walks through the full commercial electrical inspection checklist, so you know exactly what gets tested, documented and certified.
If you want the bigger picture first, our guide to commercial electrical inspection and testing explains how it all fits together. Below, we'll focus on the practical detail: what a qualified engineer looks at when they arrive on site.
What is a commercial electrical inspection?
A commercial electrical inspection checks that the wiring, circuits and connected equipment in your building are safe and meet UK standards. The result is recorded in an Electrical Installation Condition Report, known as an EICR.
The report tells you whether your installation is satisfactory or whether faults need attention. It also flags anything that could become a risk later.
Think of it as a full health check for your building's electrics.
Why commercial properties need regular inspections
Faulty wiring causes fires, shocks and downtime. None of those are things a business can afford.
Regular inspections protect your staff, tenants and customers. They also keep you compliant with your duties as a building owner or employer, and they give insurers the documentation they expect.
The practical payoff is simple. Fewer breakdowns, fewer emergency callouts, and clear evidence that your building is safe.
The commercial electrical inspection checklist
Here's what a qualified engineer works through during a typical inspection. The exact scope depends on your building, but the core checks stay consistent.
1. Consumer units and distribution boards
The engineer starts at the heart of the system. They inspect:
- The condition of consumer units and distribution boards
- Correct labelling of circuits
- Protective devices such as fuses and circuit breakers
- Signs of overheating, scorching or damage
- Adequacy of the main switch and isolation
Clear labelling matters more than people think. It lets anyone safely isolate a circuit in an emergency.
2. Wiring and cabling
Next, the engineer checks the wiring throughout the installation. They look for:
- Damaged, perished or deteriorating cable insulation
- Correct cable types and sizing for the load
- Signs of overloading or poor connections
- Cables protected against damage where needed
- Evidence of past repairs that fall short of standard
Old or damaged cabling is one of the most common reasons an installation is marked unsatisfactory.
3. Earthing and bonding
Good earthing keeps people safe if a fault occurs. The engineer verifies:
- Main earthing conductors are present and correctly sized
- Protective bonding to gas, water and other services
- Continuity of earth connections
- Correct earthing arrangements for the installation type
This is one of the most important safety checks in the whole inspection.
4. Sockets, switches and accessories
The engineer inspects accessories around the building for wear and damage. This includes:
- Sockets, switches and fused connection units
- Cracked or broken faceplates
- Signs of burning or overheating around terminals
- Suitability of accessories for their location
Damaged sockets are easy to overlook, yet they're a frequent source of faults.
5. Protective devices and RCDs
Residual current devices protect against electric shock. The engineer tests:
- That RCDs are fitted where required
- Correct operation and trip times
- Suitable circuit protection across the installation
- Devices rated correctly for the circuits they serve
Testing trip times confirms the device will actually cut the power quickly enough to protect someone.
6. Lighting and emergency systems
Lighting circuits are checked for safe operation and condition. Where emergency lighting is present, the engineer confirms it works as intended.
Reliable emergency lighting is essential for safe evacuation, so it deserves close attention.
7. Fixed equipment and circuits
Hard wired equipment, such as heating, air conditioning or kitchen appliances, is checked for safe connection. The engineer confirms each circuit is suitable for the load it carries.
8. Testing the live installation
Beyond visual checks, the engineer carries out a series of measured tests. These typically include:
- Insulation resistance testing
- Continuity testing of conductors
- Earth fault loop impedance testing
- Polarity checks
- RCD operation tests
These measurements turn a visual inspection into hard evidence about the true condition of your wiring.
What you get at the end
Once the inspection is complete, you receive your EICR. The report records:
- The overall condition of the installation
- Any observations, each given a clear classification code
- Recommended actions and timescales
- The date of the next recommended inspection
If anything is marked as unsatisfactory, the report tells you what needs fixing and how urgent it is. From there, you can plan repairs without guesswork.
How often should you book an inspection?
Inspection frequency depends on the type of building and how it's used. Your engineer will recommend a sensible interval based on your installation.
Booking inspections on schedule keeps your records up to date and avoids a last-minute scramble before an insurance renewal or audit.
Why choose Ignite Facilities
Electrical safety isn't something to leave to chance. Our accredited engineers carry out inspections, document the findings clearly and certify the work properly.
We're NICEIC accredited and SafeContractor approved, and we're trusted by names including Alton Towers, Hilton, Best Western and Five Guys.
Better still, we handle every building service under one roof. Heating, plumbing, electrical, gas, air conditioning and renewables, all from one local partner. That means one call when something needs doing, and one team that knows your building.
Based in Staffordshire, we look after commercial properties across the region with the same care we'd give our own.
