Skip to main content

Our Network

Our network consists of 220,000 km of overhead lines and underground cables, and 185,000 substations.

About our network

Electricity is carried countrywide via the National Grid at 275,000 or 400,000 volts. It is reduced to 132,000 volts for regional distribution at substations known as Grid Supply Points. From there it is disseminated to further substations via overhead lines or underground cables at 132,000 volts. The voltage is reduced again to 33,000 volts and then to 11,000 volts. 

This distribution network then carries electricity to individual towns and villages throughout the Midlands, South West and Wales where distribution substations transform the voltage to 230 volts.

Long term development

We're always thinking of the future and the long term developments of our network.

Distribution area

Do we distribute electricity to you? Use our handy search facility to find out.

LGA/LEP Liaison for Network Development

We are opening up channels of engagement around capacity and infrastructure with local authorities and local partnerships.

Network information

Information about our network, including maps on the layout of generation and capacity and resources on our network development.

Distributed generation EHV constraint maps

Here you can find an overview map of our EHV networks (33kV and above), highlighting those circuits which are operating at or near their limits for the connection of any further Distributed Generation (DG).

Generation capacity register

A register listing generators that are connected to our network, or which are in the process of applying for connection.


We're committed to driving down customer costs and carbon emissions and we're doing as much as possible to reduce losses.

Use of system charges

These pages provide useful information for electricity suppliers and major users about our charges for use of system, metering and others.

Loss of Mains

Distribution Network Owners and National Grid ESO are teaming up through the accelerated loss of mains change programme to accelerate compliance with new requirements in the Distribution Code.

Distribution code

Here you will find information on the distribution codes of licensed electricity distribution operators of Great Britain.

Location of WPD's equipment

Never take chances if you're planning to work near our equipment, we're here to help you before you start the process.

Current WPD network planning consultations

Brechfa Forest Connection

Read the latest on the Brechfa Forest West Wind Farm connection project.

Find out more