Choosing the right power supply is an important part of setting up or upgrading a garage workshop. Whether you are buying a new vehicle lift, tyre changer, wheel balancer or other garage equipment, understanding the difference between 1 phase and 3 phase power can help you avoid installation problems and unnecessary costs.

So, what is the difference between single phase and three phase power, and which is best for your garage?

What is 1 Phase Power?

1 phase, also known as single phase, is the type of electrical supply commonly found in homes and smaller commercial premises. In the UK, it typically provides a 230V supply and is suitable for many lower-powered applications.

For smaller garages, single phase can be more than sufficient. A wide range of modern garage equipment is specifically designed to operate on 1 phase power, meaning you do not necessarily need a 3 phase supply to run a professional workshop.

What is 3 Phase Power?

3 phase, or three phase power runs at 400V AC power (often referred to as 415V), and uses three alternating electrical supplies rather than one. In commercial and industrial environments, it is commonly used to provide a higher and more consistent supply of electrical power.

Three phase is particularly useful where equipment is being used frequently or where multiple high-demand machines need to operate as part of a busy workshop. Concept Garage Equipment’s range includes 3 phase vehicle lifts, MOT equipment and other professional garage machinery.

Single Phase vs Three Phase: Which Is Best?

There is no universal winner when comparing single phase vs three phase. The right choice depends on your building, the equipment you intend to use and the demands of your business.

1 Phase

• Common in smaller premises
• Suitable for many garage machines
• Generally simpler where already installed
• Ideal for many smaller workshops
• Many modern machines are available in 1 phase

3 Phase

• Common in larger commercial workshops
• Better suited to higher-powered equipment
• Provides greater available power
• Useful for busy, high-volume workshops
• Often required for larger equipment

The important thing is to check the electrical specification of every machine before you buy. A machine requiring three phase power cannot simply be connected to a standard single phase socket.

Can You Convert Single Phase to Three Phase?

If your premises only has a single phase supply but you want to install equipment that requires three phase power, a single phase to three phase converter may be an option.

Concept Garage Equipment has installed MOT bays in buildings with only a single phase supply by using a phase converter to provide a three phase output. This can provide an alternative to arranging a new three phase supply, depending on the equipment and electrical installation involved.

However, a converter is not automatically the right solution for every machine. The power requirements, motor rating and total electrical load should all be assessed before installation. A qualified electrician and your garage equipment supplier should be consulted to ensure the proposed setup is suitable.

Do You Need 3 Phase Power for a Garage?

Not necessarily.

A modern garage workshop can operate successfully using single phase power, particularly if it uses equipment specifically designed for a 1 phase supply. In fact, Concept Garage Equipment supplies numerous tyre changers, wheel balancers and vehicle lifts that can operate on single phase.

However, if you are planning a high-volume workshop with multiple vehicle lifts, compressors, MOT equipment and other high-powered machinery, three phase power may provide greater flexibility for your installation.

What are the voltages used for 1 phase and 3 phase in UK garages?

In most UK garages and outbuildings, you’ll come across two main types of electrical supply:

• Single‑phase: this runs at 230V (measured between the live wire and neutral). It’s what you’ll find in nearly every standard domestic garage and is fine for lighting, sockets, small power tools and most hobbyist equipment.
• Three‑phase: this gives you 400V between any two of the live phases, and still gives you 230V if you take power from any one phase to neutral. It’s typically used for heavier workshop equipment like large compressors, two‑post lifts, welders or commercial‑grade machinery that needs a bit more grunt.

You might sometimes hear three‑phase referred to as “415V”, that’s an older nominal figure, but the actual UK standard today is 400V. For all practical purposes, though, it’s the same thing.

Choosing the Right Power Supply for Your Garage

Before ordering new garage equipment, check:

• What electrical supply is available at your premises?
• Does each machine require 1 phase or 3 phase?
• What is the machine’s voltage and power rating?
• How many machines could operate simultaneously?
• Would upgrading your electrical supply be cost-effective?
• Could a suitable single phase to three phase converter be used?

Getting these answers early can prevent costly changes later.

Need Help Choosing Garage Equipment?

At Concept Garage Equipment, we supply and advise on a wide range of garage equipment, including vehicle lifts, tyre changers, wheel balancers and MOT equipment. Our team can help you identify equipment that matches your premises, workload and available electrical supply.

Please note: Always get a qualified electrician to advise, install or inspect your electrical supply within your premises, as this is not something a garage owner or home user without suitable qualifications should attempt.

Give our friendly team a call today for help and advice on 01302 203 888 or contact us via our contact form.