Periodic Electrical Installation Inspection – How Often? 

By on

periodicInspectionsInspection of electrical installations on a periodic basis is essential to ensure the continued safety and reliability of such installations.

How often installations are inspected is up to the owner of the installation, provided such durations do not exceed any regulatory maximums in force. The criticality of the electrical installation to the continuation of the business, often determines how frequently the installation is inspected, for example many banks will carry out annual inspections of their installations. Other types of enterprise may do inspections more frequently and many installations are only inspected as often as required by regulation.

It is also possible, that different parts of an electrical installation are inspected with varying periods. Critical systems may be inspected more often than non-critical systems.

Depending where you live, it is likely that electrical installation regulations will exist, which will state the maximum duration allowable between inspections. For example in the IEE Wiring Regulations in the UK and the National Electric Code in the US, both deal how long an installation can be left without being inspected.

As an example in the UK, IEE Guidance Note 3, Inspection & Testing contains a table which gives the maximum allowable periods between inspections - offices, residential accommodation five years, leisure complexes, theatres three years, marinas, swimming pools one year, … , etc.

Now that the when has been covered, my second post will look at what should be inspected:

Periodic Electrical Installation Inspection – What to Inspect?



Steven McFadyen's avatar Steven McFadyen

Steven has over twenty five years experience working on some of the largest construction projects. He has a deep technical understanding of electrical engineering and is keen to share this knowledge. About the author

myElectrical Engineering

comments powered by Disqus

  1. Eurotechworld's avatar Eurotechworld says:
    6/7/2012 7:11 PM

    It is wonderful information and very helpful in business. Thanks for shearing this topic friend.

    Third Party Inspection


Comments are closed for this post:
  • have a question or need help, please use our Questions Section
  • spotted an error or have additional info that you think should be in this post, feel free to Contact Us



Differential protection, the good old days

This morning I was explaining how differential protection works to a junior engineer. To give him something to read I opened up the NPAG (Network Protection...

Laplace Transform

Laplace transforms and their inverse are a mathematical technique which allows us to solve differential equations, by primarily using algebraic methods...

Capacitors - Energy Storage Application

Capacitors have numerous applications in electrical and electronic applications.  This note examines the use of capacitors to store electrical energy....

MIT OpenCourseWare

MIT OpenCourseWare, makes the materials used in teaching all MIT subjects available on the Web, free of charge, to any user in the world.

Voltage Levels to IEC 60038

The standard aims to consolidate AC and traction voltages within the industry and defines the following bands: band 1 - A.C. systems 100 V to 1...

Tech Topics/Application Notes - Siemens

There are a lot of interesting two page type notes on various medium voltage topics – switchgear, circuit breakers, bus systems etc. It is on the Siemens...

Cost Performance and Time

Often us engineers get so bogged down in equations, using software, producing drawings and writing specifications that this becomes the sole focus.   ...

How to Size Power Cable Duct

Some colleagues had an issue earlier in the week on sizing conduits to be cast in concrete for some power cables . It became clear that none of us had...

Understanding Circuit Breaker Markings

IEC 60947 is the circuit breaker standard and covers the marking of breakers in detail. Any manufacturer following this standard should comply with the...

Power Transformers - An Introduction

One of the fundamental requirements of an alternating current distribution systems it to have the ability to change the magnitude of voltages.  It is more...

Have some knowledge to share

If you have some expert knowledge or experience, why not consider sharing this with our community.  

By writing an electrical note, you will be educating our users and at the same time promoting your expertise within the engineering community.

To get started and understand our policy, you can read our How to Write an Electrical Note