Get in Touch

5 Key questions in choosing an electrical contractor

If you’re planning a major electrical installation or upgrade at your commercial premises, you’ll need an electrical contractor.

But a quick search on the internet will show you thousands of electrical contractors, possibly hundreds just in your local area. So how do you know which is right for your business?

This article looks at the five key questions in choosing an electrical contractor to ensure you don’t get caught out.

1. Is your electrical contractor accredited by a professional body?

It’s a bit of a trick question – because the answer should always be ‘yes’, but it’s important you know what to check for.

As an absolute minimum, your electrical contractor should be registered with a government-approved registering body. The most common in the UK is the National Inspection Council for Electrical Installation Contracting – or NICEIC.

To be qualified by NICEIC, contractors must undergo assessments and regular reassessments. The easiest way to check a contractor is registered with NICEIC is to ask for their NICEIC registration number. If a contractor cannot prove their accreditation, you should discount them immediately.

As well as NICEIC, you should look for accreditations that demonstrate health and safety compliance.

Two key accreditations to look out for are CHAS (Contractors Health and Safety Assessment Scheme) and SafeContractor. Accreditation or membership with either or both means your electrical contractor meets all necessary health and safety requirements and complies with government legislation.

You should also ask for proof of insurance and ensure the level of cover is adequate for the size of the project and the risk involved.

2. Does your electrical contractor require specialist knowledge, training or accreditation?

A specialism isn’t always necessary, but some electrical contracting work remains quite niche. For example, not all electrical contractors are qualified to install EV charging points.

Another thing to consider is the location of the work. If you have hazardous or ATEX areas, you’ll need a contractor who understands the guidelines and regulations for working in these areas.

AES is one of a small number of electrical contracting businesses qualified to work in ATEX environments under CompEx (Competency working in Explosive atmospheres) accreditation.

If your project involves working at height, your contractor will need the relevant licences or training.

A specialist isn’t necessary for straightforward electrical installations, but there may be some aspects of the work you haven’t considered. If in doubt, look for a contractor with experience working in other businesses like yours.

3. Does your electrical contractor have relevant experience?

Not all buildings, businesses or projects are the same, and if your project is quite specialist, you should choose an electrical contractor with a proven track record.

Perhaps your building is listed or heritage, in which case there may be special considerations or restrictions when carrying out lighting or electrical upgrades or alterations.

If you’re a manufacturing business with a high volume of plant machinery and equipment, your requirement will be much more complex than that of a small office unit. Choose a contractor who works with other manufacturers.

Maybe you’re looking to install a new control and automation system in your factory? Not all electrical contractors will have specialist knowledge in this area, so you’ll need to look for a company, like AES, that does.

Look for contractors who have relevant experience in what you need. If you aren’t sure, ask for case studies or client feedback from past projects.

4. Can your electrical contractor scale to meet your needs?

Electrical Contractor Superhero

You don’t want to have to choose a new electrical contractor every time you need electrical work. Rather than select your contractor based purely on what you need today, look for one who can support you now and in the future.

A small local contractor might be able to upgrade your lighting, but will they have the capacity to take on a factory redesign or expansion you have planned for next year?

A large national contractor might be happy to assist with a new build design and installation, but do they offer emergency fault repair or ongoing planned maintenance.

Look for a contractor who can scale their services up and down in line with your needs and support your entire business, not just parts of it.

5. What else can your contractor offer?

Sometimes you simply need someone to come in and take care of the job at hand, and plenty of contractors are happy to do just that.

But if you really want to get more from your electrical contractor, choose one who can offer expert advice and recommendations to help you improve your business.

At AES, we offer a range of specialist services for industrial and manufacturing businesses. Not only do we help them stay safe, compliant and operational, we help them improve productivity, reduce downtime, increase efficiency and lower their carbon emissions through energy reduction.

Why choose AES?

AES offers all the electrical contracting services you would expect, coupled with specialist services specifically for manufacturing businesses.

Our industry accreditations include NICEIC, CHAS, SafeContractor, CompEx, IPAF and PASMA.

We can scale our services to meet the needs of your business, from ongoing planned maintenance and fault repair to machinery installation and factory relocation.

And we provide expert advice and recommendations on energy reduction, control and automation and safety compliance.

Book your free site survey and energy audit today. Contact our friendly team.

image description

What a Factory Acceptance Test (FAT) Should Include and Why It Matters

Installing new machinery, production equipment or automated systems into a factory is rarely a small decision. For most manufacturers, it involves significant capital investment, careful planning, disruption to normal operations and a clear expectation that the new equipment will improve output, efficiency, quality or safety. That is why a Factory Acceptance Test, often shortened to […]

Read more
image description

Retrofitting Automation into Older Factories: Where to Begin

As UK manufacturers adapt to the changing demands of production, factory automation is becoming essential, not just for new high-tech facilities, but for older, established sites too. Many mid-sized and large manufacturers operating in legacy buildings are turning to automation to increase productivity, lower costs, and deal with staffing challenges. However, adding automation to an […]

Read more
image description

Battery Energy Storage Systems: Why Safety Planning Matters More Than Ever

Battery energy storage systems are becoming an increasingly visible part of the UK energy landscape. Once seen mainly as large-scale infrastructure supporting renewable generation and grid balancing, they are now moving into the conversation for industrial and commercial sites too. As more businesses explore onsite generation, peak load management, resilience planning and wider decarbonisation strategies, […]

Read more
image description

UK Manufacturing in 2026: Trends Shaping Your Electrical Infrastructure

Introduction: As manufacturers gear up for 2026, the industry faces a wave of change. In our latest white paper, “UK Manufacturing Trends 2026: What They Mean for Your Electrical Infrastructure,” we explore the top trends set to reshape factories across the country. From the rise of smart automation to the pursuit of net-zero, these developments […]

Read more
image description

Why Voltage Optimisation Still Delivers ROI in 2026

Voltage optimisation isn’t a new idea. It’s been part of industrial electrical design for years. Yet in 2026, it’s still one of the most misunderstood energy-reduction measures and often dismissed as “old tech” or oversold as a guaranteed saving for every site. The reality is somewhere inbetween. For the right type of manufacturing plant, especially […]

Read more
image description

Automating for Efficiency: How UK Manufacturers Are Boosting Output

Over the past few years, UK manufacturers have had to do more with less: tighter labour markets, rising input costs, and pressure to shorten lead times without compromising quality. In this environment, automation isn’t a luxury. It’s a practical way to increase output, stabilise quality, and free people from repetitive tasks so they can focus […]

Read more