Why take the 3 Phase Training Course?

Need to learn more about 3 phase systems? Then this 1 Day electricians course is ideal for those with existing experience of electrical installation.

Looking to move to the next level? This one day course is for electrical installers who are experienced with installation and testing of single phase supplies but who have little or no experience of working with three phase systems.

This 3 phase training course will teach you to select and install the correct equipment. You will also learn how to test a 3 phase installation. It is taught by means of classroom based learning and practical demonstrations. 

Course overview

Why take this 3 Phase Training Course?

This 3 phase training course is designed to provide the knowledge necessary to select and install the correct equipment. It will also teach you to test an installation that is connected to a three phase supply up to 100A per phase and that may be found in a large domestic or small commercial premises. The emphasis in this 3 phase training course is on knowledge and safety at all times.

By extending your knowledge to cover three phase you will then be able to work on larger installations and extend your scope of work.

As a specialist electrical training centre we have the equipment, the knowledge and the experience to train you competently in this area.

Entry Requirements / Who’s it for?

This is an in house course and as such there are no formal entry requirements. However you should have experience of single phase installations, including the requirements for inspection and testing in order to complete this advanced course.

This course is ideal for existing domestic installers and also anyone contemplating doing the City & Guilds 2391, 2394, or 2395 qualifications or have little experience of three phase systems.

3 Phase Course Content:

On this one day three phase course you will be trained via classroom presentation, discussion and also demonstrations on purpose built three phase installation rigs in our dedicated electrical training centre. The course is split into three sections:

  • Generation, transmission and distribution
  • Following the completion of this course, candidates will be able to;
  • Describe how a three phase supply is generated.
  • Describe how three phase is transmitted and distributed.
  • State the voltages present in a three phase system.
  • Describe how a single phase supply is derived from a three phase supply.
  • State why a premises may require a three phase supply.


  • Following the completion of this course, candidates will be able to;
  • Describe appropriate equipment and connections for a three phase supply:
  • Metering; Isolation and switching; Distribution boards; Overcurrent protective devices; Busbar chambers / panel boards
  • Describe the function of a neutral in a three phase system.
  • State why single phase loads should be balanced in a three phase system.
  • State the isolation requirements for three phase systems.
  • State the labelling and identification requirements for three phase circuits and systems.
  • State the requirements to avoid eddy currents in an installation.


Following the completion of this course, candidates will be able to:

  • Identify the isolation procedures for three phase systems.
  • Describe the difference between testing of single phase and three phase systems.
  • Describe the short circuit currents in a three phase system and the impact on the selection of overcurrent protective devices.

Our locations

As well as the having multiple large sites, we also have a number of sites dedicated to delivering the 18th edition wiring regulations & PAT Testing courses.

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Our Mitre Court and Explorer 2 Facilities are just 2 minutes south of Gatwick Airport and are easily accessible by car, bus and train. They are comfortable, light and airy environments in which students can learn a wide range of practical and theory based skills.

Mitre Court, Fleming Way, Crawley, West Sussex, RH10 9JY
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Phoenix House has raised the bar for electrical training centres in the UK. The centre is just East of Leeds situated just off of the M1 / A1. This makes it easily accessible from Leeds, Sheffield, Hull, York, Harrogate and all over Yorkshire.

Phoenix House, Hawthorn Park, Coal Road, Leeds, West Yorks, LS14 1PQ
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Our Northern training facility is situated just off Junction 10 of the M62 at Birchwood Park and is very accessible from towns such as Warrington, Manchester, Liverpool and Chester.

Unit B, The Beacons, Warrington Road, Birchwood, WA3 6WY
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Our brand new centre opened in July 2019 offering a full range of electrical courses  for those based in Birmingham, Coventry, Leicester, Northampton and all over the midlands region. The new centre is based in Westwood Business Park right next...

Rowan House, Westwood Way, Coventry, West Mids, CV4 8HS
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