Commercial wiring in Purleythat keeps you trading
Work scheduled around your opening hours, documentation your insurer and landlord will actually accept, and £2 million public liability cover on every job.
NAPIT registered, £2 million insured, 10/10 on Checkatrade, 320 reviews logged over the years, 15 years working with local shops, offices and units.
NAPIT registered
Government-approved competent person scheme
Part P registered
Domestic work certified to Building Regulations
£2 million cover
Public liability insurance on every job
1 year guarantee
Workmanship guaranteed for twelve months
10/10 on Checkatrade
320 reviews logged on the profile over the years
Service overview
Commercial wiring & reports explained
Shops, offices, workshops and small industrial units. Work scheduled around opening hours where we can, with the documentation your insurer and landlord will ask for.
What it involves
Commercial electrical work for shops, offices, salons, workshops, warehouses and small industrial units: new circuits and small power, distribution board work, lighting installation and upgrades, maintenance, fault finding, periodic inspection reports and remedial work.
It covers fit-outs and refurbishments as well as the unglamorous ongoing work, the failed lighting in a stockroom, the socket a new machine needs, the report the landlord has asked for.
Who it is for
Business owners and facilities managers across Croydon, Purley, Sutton and London. Retailers fitting out a unit. Offices reconfiguring desk layouts. Workshops adding machinery. Landlords and managing agents responsible for commercial premises and communal areas.
When you need it
At fit-out or refurbishment, when equipment or headcount changes the load, when lighting is failing or expensive to run, when an insurer or lease requires periodic inspection, and when something breaks and trade is at risk.
Periodic inspection for commercial premises is commonly required every five years, or at whatever interval your insurer or lease specifies.
Why it needs a qualified electrician
Commercial installations carry higher loads, frequently three-phase supplies, and higher consequences. A fault that inconveniences a household closes a business for the day.
There is also a duty angle. Under the Electricity at Work Regulations, employers must maintain electrical systems so far as reasonably practicable to prevent danger, and demonstrating that means documented inspection and testing, not good intentions.
What happens if it waits
The cost of leaving it
Deferred electrical work in a commercial property tends to be paid for in lost trading rather than saved maintenance.
Risks and escalation
- An unplanned failure closes the premises during trading hours, at a cost that dwarfs the repair itself.
- Insurers can challenge a claim where the installation has not been inspected and maintained at the required interval.
- Overloaded distribution boards and circuits run hot, and the failure typically arrives when the premises is at its busiest.
- Inadequate lighting levels and failed emergency lighting create staff and customer safety exposure, and can surface in a licensing or landlord inspection.
- Undocumented alterations by previous occupiers accumulate until nobody knows what feeds what, which turns a ten-minute fault into a half-day search.
Common mistakes we are called to undo
- Using a general handyman for commercial circuits, then discovering the work cannot be certified.
- Leaving the distribution board unlabelled, so isolating one area means shutting down the whole unit.
- Booking the inspection during trading hours, then refusing the shutdowns testing actually requires.
- Adding equipment loads incrementally without ever reassessing the supply capacity.
We quote in writing, schedule out of hours where it protects your trading, and issue the certification that keeps your insurer and landlord satisfied.
Our process
How the job runs, start to finish
Step 1
Site survey and free quote
Jon surveys the premises, checks the supply, distribution and existing documentation, and agrees scope, phasing and access, then quotes in writing, free.
Step 2
Programme agreed around trading
Shutdowns, out-of-hours phases and areas of work planned with you so the premises keeps trading wherever possible.
Step 3
Installation or inspection
Circuits, boards, small power and lighting installed to BS 7671, or inspection and testing carried out to the agreed sampling level.
Step 4
Testing and verification
Full test results recorded, boards labelled with a clear schedule, and any defect found reported with a separate quote.
Step 5
Documentation and guarantee
Certificates or the periodic report issued promptly, with twelve months' workmanship guarantee on installation work.
What's included
Commercial wiring & reports with JMO
- New circuits, distribution boards, small power and lighting
- Commercial periodic inspection reports and remedials
- Out-of-hours work available so trading is not interrupted
- £2 million public liability cover on every job
Costs, plainly
Free quotes on planned work. £85 call-out during standard hours, which covers the first hour of work on fault-finding jobs. Evenings and weekends £140 per hour. All workmanship guaranteed for one year.
Benefits
What you get out of it
Out-of-hours availability
Evening and weekend working keeps shutdowns off your trading hours.
Documentation that stands up
Certificates and reports in the form insurers, landlords and managing agents expect.
Faster future fault response
Properly labelled boards and recorded circuits cut diagnosis time when something does go wrong.
Lower energy cost
LED lighting upgrades with sensible zoning and control typically pay back through reduced consumption and lamp replacement.
Capacity you can plan around
Knowing your real spare capacity means new equipment can be specified without surprises.
One accountable contact
Jon quotes, attends and answers the phone. No account manager between you and the electrician.
In detail
Commercial wiring & reports: the detail that matters
What we cover commercially
The work spans installation, maintenance and compliance, on premises from a single shop unit to a multi-room office floor.
- New final circuits, small power and dedicated machine supplies
- Distribution board installation, replacement, extension and labelling
- Three-phase supplies and equipment connection
- Commercial LED lighting installation, upgrades and relamping
- External, yard, signage and car park lighting
- Commercial periodic inspection reports (EICR) and remedial work
- Fault finding, reactive maintenance and planned maintenance visits
- Fit-out and refurbishment electrical works, coordinated with other trades
Three-phase, discrimination and capacity
Many commercial units are on a three-phase supply. That brings load balancing across phases, discrimination between upstream and downstream protective devices, and correct selection for motor and inductive loads into the design, none of which apply in a typical house.
Discrimination in particular is what stops a fault on one small circuit tripping the main incomer and shutting the entire premises. Where we find a board without it, we say so and price the fix.
Inspection, sampling and access
Commercial periodic inspection usually proceeds on an agreed sampling basis, because full isolation of a trading premises circuit by circuit is rarely practical during the day. The extent of sampling is agreed in writing before the visit and recorded on the report.
Where full testing is required, we schedule it for evenings, weekends or closed periods. Reports are issued promptly with coded observations explained plainly and any remedial work quoted separately.
Residential and commercial differences
Domestic work is notifiable under Part P; commercial work is not, but is still designed, installed, inspected and certified to BS 7671, and sits under the Electricity at Work Regulations from a duty-holder perspective.
The practical differences are scale, supply type, documentation expectations and access. The standard of the installation work itself is identical, the same tester, the same regulations, the same one year guarantee.
Areas covered
Commercial electrical work across Croydon, Purley, Caterham, Coulsdon, Sanderstead, Warlingham, Kenley, Sutton and London, retail units, offices, salons, workshops and small industrial premises.
Reviews
What customers say
10/10
“Communications and arranging the date was excellent. Standard of work to a high standard and all to the agreed quotation.”
10/10
“Jon and his team turned up promptly as agreed, completed all works to a high standard and at a reasonable price.”
10/10
“Quickly turned up and safely dealt with cut cable to external garage. Great communication throughout.”
FAQs
Commercial wiring & reports: common questions
Do you work outside our opening hours?
Yes. Evening and weekend working is available so shutdowns do not cost you trading. Out-of-hours attendance is charged at £140 per hour; standard hours are 8:00am to 5:30pm.
How much does commercial electrical work cost?
Every premises is different, so Jon surveys and quotes in writing, free of charge, with the scope and phasing set out clearly.
Are you insured to work on commercial premises?
Yes: £2 million public liability insurance applies to every job, and JMO Electrical is NAPIT registered.
How often does a commercial EICR need doing?
Commonly every five years, though your insurer or lease may specify a shorter interval. We agree the scope and sampling before the visit.
Can you work around other trades during a fit-out?
Yes. First fix, second fix and testing are programmed alongside the other trades so the fit-out is not held up waiting on power.
Will you label the distribution board?
Always. A clear schedule showing what each device protects is part of the job and saves hours the next time something needs isolating.
What happens if we have a failure mid-trade?
Call the number on this page. Emergency attendance is available 24/7 for loss of power and dangerous faults, with the installation made safe first and the repair quoted before it proceeds.
Is commercial installation work guaranteed?
Yes, twelve months' workmanship guarantee on installation work, with certification issued on completion.
Do you take on planned maintenance?
Yes: recurring inspection, lighting maintenance and periodic testing can be scheduled so compliance dates never creep up on you.
Areas covered
Commercial wiring & reports across Surrey and south London
Related services
New here? Start on the JMO Electrical home page, browse all services, or get in touch with Jon.
Get a free commercial survey and written quote
Jon visits the premises, agrees the scope and phasing around your trading hours, and prices the work in writing with the documentation included.