Skip to content


We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we'll assume that you are happy to receive all cookies on the Electricity North West website. However, if you would like to, you can change your cookie settings at any time.

Continue      Find out more

Adjust text size:   A   A   A

Power quality

Our policy on power quality includes:

  • transient variations in voltage and frequency;
  • limits of voltage fluctuations, harmonics and fault level.

The policy is detailed in EPD290 - Power quality strategy and further guidance on application is provided in CP290 - Power quality. Where power quality issues do arise these will be dealt with as detailed in the policy.

Power quality will generally be as specified in BS EN 50160:1999 Voltage characteristics of electricity supplied by public distribution systems.

In addition, the requirements of Energy Networks Association Engineering Recommendation P28 Planning limits for voltage fluctuations caused by industrial, commercial and domestic equipment in the United Kingdom, and ENA ER G5/4 Limits for harmonics in the UK electricity supply system shall be met.

Are you a priority customer?

We appreciate that some customers have additional requirements and may have circumstances where a priority service is needed for a variety of reasons.

Learn more

Knowledge centre

Find answers to questions about Electricity North West, including details on electricity connections, power cuts and general enquiries

Check out frequently asked questions and our user guides.

Read more

Major incident

Engineers are working to restore power to properties after severe flooding in Lancashire and Rochdale.

We are doing everything we can to restore power and we'll update you regularly on our news section and TwitterFor emergencies, please call us on 0800 195 4141.