EICR for Industrial Units and Warehouses: Three-Phase Fixed Wire Testing in Greater Manchester
Greater Manchester is one of the country's most important centres for logistics, light manufacturing and distribution. From the vast estates of Trafford Park to the industrial parks of Salford, Wythenshawe, Oldham and Bury, thousands of units rely on electrical installations that work far harder than anything in a typical office or home. Heavy machinery, three-phase supplies, around-the-clock operation and demanding environmental conditions all place stress on the fixed wiring — and that is exactly why industrial EICRs need a different approach.
This guide covers how EICR testing (often called fixed wire testing in commercial and industrial settings) applies to warehouses and industrial units, how often it is needed, and how to test without shutting down your operation.
What Is Fixed Wire Testing and How Does It Relate to an EICR?
Fixed wire testing and an EICR are the same thing: a periodic inspection and test of the building's fixed electrical installation, recorded on an Electrical Installation Condition Report. In commercial and industrial settings the term "fixed wire testing" is more common, but the document, the standards and the legal weight are identical.
The inspection assesses the distribution boards, final circuits, cabling, isolators, protective devices and earthing and bonding that make up the permanent installation. It does not cover the machinery itself or portable equipment — those fall under separate machinery safety checks and PAT testing — but it does cover everything up to the point of connection.
For industrial duty holders the relevant law is the Electricity at Work Regulations 1989, which require that electrical systems be maintained to prevent danger. A current, satisfactory EICR is the standard evidence that you are meeting that duty.
How Often Do Industrial Units Need an EICR?
Frequency depends on the environment and how hard the installation is working. The widely accepted intervals, derived from the IET guidance underpinning BS 7671, are:
- Industrial premises and warehouses — every 3 years. The higher mechanical and thermal stress, dust, vibration and continuous operation justify a shorter interval than commercial offices.
- Commercial offices and retail — every 5 years, for comparison.
- More demanding sub-sections — areas with corrosive atmospheres, washdown processes, or heavy switching loads may warrant interim inspections between full EICRs.
Three-Phase Installations: What Makes Industrial Testing Different
Most industrial units in Greater Manchester run on a three-phase supply rather than the single-phase supply found in homes. Three-phase brings higher capacity for motors, compressors, lifts and process equipment, but it also adds complexity to the inspection:
- Phase balance must be assessed — significant imbalance across the three phases causes overheating, wasted energy and nuisance tripping.
- Larger distribution systems mean more sub-mains, more boards and more circuits to test, which extends inspection time.
- Motor circuits and direct-on-line starters need careful isolation and testing, as do any variable speed drives.
- Older Trafford Park and Salford units were frequently wired decades ago for different processes; supplies designed for one type of machinery may be poorly matched to the building's current use.
Testing Without Shutting Down Your Operation
The biggest concern for warehouse and factory operators is downtime. A full EICR requires circuits to be isolated and tested, which means power interruptions — but with planning these can be controlled and minimised.
We manage industrial inspections around the business rather than the other way around:
- Out-of-hours and weekend testing so isolations happen when the line is idle and dispatch has stopped.
- Phased circuit-by-circuit testing so only one area is de-energised at a time and the rest of the site keeps running.
- Pre-inspection planning using your circuit schedules and a walk-round to map critical loads — servers, refrigeration, security and fire systems — that must stay live or be safely managed.
- Clear isolation and permit-to-work procedures coordinated with your site team to keep everyone safe.
Common Failures in Warehouses and Industrial Units
Industrial environments generate a distinctive set of EICR observations:
- Damaged or unsuitable wiring — cables run across traffic routes, crushed by racking, or degraded by heat near process equipment.
- Dust and contamination ingress — distribution boards and enclosures that no longer meet the IP rating needed for the environment.
- Overloaded sub-circuits — added machinery and EV charging or extra loads bolted onto installations that were never designed for them.
- Inadequate earthing and bonding — particularly in older units or where extensions and mezzanines have been added piecemeal.
- Missing or non-functional RCD protection on socket circuits used for portable tools.
- Loose connections and signs of overheating at distribution boards — the most common hidden defect, and the one thermal imaging catches best.
What Does an Industrial EICR Cost?
Industrial and warehouse EICRs are priced by the size and complexity of the installation — the number of distribution boards and circuits, the supply arrangement, and the access required — rather than a fixed flat rate. A small single-board trade unit is a modest job; a large multi-board distribution warehouse with three-phase sub-mains is a substantial programme of work, often phased over several visits.
For larger sites and multi-unit estates we provide a fixed quotation after a brief survey or review of your existing schedules, so there are no surprises. See our commercial and industrial testing services for more detail.
Frequently Asked Questions
Is fixed wire testing the same as an EICR?
Yes. Fixed wire testing is the commercial and industrial term for the periodic inspection recorded on an EICR. The standard and the legal requirement are identical.How often does a warehouse need fixed wire testing?
Industrial premises and warehouses are typically inspected every three years, with annual interim checks or thermal imaging recommended for heavily used distribution boards.Do you test three-phase supplies?
Yes. Our engineers are experienced with three-phase distribution, motor circuits, large-frame switchgear and the phased testing needed to keep a live site operating.Can you test outside working hours to avoid downtime?
Yes. We routinely carry out evening, night and weekend testing and phase the work circuit by circuit so most of your operation stays live throughout.Does an industrial EICR cover my machinery?
No. The EICR covers the fixed installation up to the point of connection. The machines themselves are covered by separate machinery and equipment safety regimes, and portable tools by PAT testing.Book an Industrial EICR in Greater Manchester
Manchester Compliance Ltd carries out fixed wire testing for warehouses, factories, distribution centres and industrial units across Trafford Park, Salford, Wythenshawe, Oldham, Bury and the wider North West. We plan around your operation, test out of hours where needed, and provide fixed quotations for single units and multi-site estates.
- Phone: 0161 706 1360 (Monday to Friday, 8 AM to 5 PM)
- Email: Info@manchestercompliance.co.uk
- Emergency line: 0161 706 1360 (24/7)
- Address: 25 Holden Clough Drive, Ashton-under-Lyne, OL7 9TH