Electric Vehicle Infrastructure

Electric vehicle charging infrastructure installation notification

The following information is relevant to any customer installing EV charging equipment in their property, as well as for the person undertaking the install.

Background

Electric vehicles (EV) have a strategic role in reducing greenhouse gas emissions from road transportation and are a key component of the transition to a low carbon economy. The electricity network operators are investing in their networks to ensure they can safely and reliably meet the increase in electricity demand required to support electric vehicle charging.

It is therefore important for distribution network operators (DNOs) to have visibility of where the EV charging equipment is connected, to better understand the increased demand, as well as ensure the network is fit for purpose.

IET Code of Practice and Guidance

The recommended way to recharge an EV is from a dedicated electric vehicle charging equipment, also known as an EV ‘charge point’. The IET’s Code of Practice on Electric Vehicle Charging Equipment Installation (IET COP) provides guidance and outlines best practice for installers on a range of installation issues. It also specifies that in the case of dedicated EV charging equipment installed at any site the installer shall ensure that the appropriate DNO has been notified of the installation within one calendar month of the installation.

 The IET Code of Practice highlights the installer’s responsibility to:

  • Assess the adequacy of the supply capacity for the new electric vehicle load plus any existing load, before installing the charging equipment,
  • Assess the adequacy of the earthing, before installing the charging equipment, and
  • Notify the DNO of the installation once completed.

Notification Forms

Either of the Notification Forms below should be used for this purpose, and must be sent directly to the DNO by the installer to notify that the charge point has been installed.  There is a Word document for notification of single installations or a spreadsheet for notification of multiple installations.  Installers are encouraged to use the spreadsheet for ease of use.

ENA EV Notification Word Form          ENA EV Notification Spreadsheet

Please note that an‘adequacy of the supply’ assessment, highlighted in the IET COP, is required prior to any EV charge point installation.This requires a load survey of the property to be completed to calculate the new Maximum Demand (MD) after diversity, including the new electric vehicle charging equipment load at the property.

DNO should be contacted prior to installation to establish the property’s supply capacity in the following instances:

  • Where there is an identified issue with adequacy or safety concern with the property’s existing service equipment
  • Where the property’s MD (post-installation) will be greater than 60A (13.8kVA).

For more information regarding cut-out and cut-out fuse concerns, please see NAPIT’s Guidance on reporting issues with Distribution Businesses’ service equipment and NAPIT’s Supplementary Guidance Distribution Businesses Emergency Codes Explained

Maximum Demand (MD)

There is guidance in the IET COP on supply adequacy (Maximum Demand) assessment. This information is critical to understand if the EV charge point will be supported by the network.  There are different approaches to determining a site’s MD, including:

  • Use existing information – this is the best approach when there is available data on the specific loads in the house. However, this may not always be the case.
  • Determine loads installed – this approach takes diversity into consideration where appropriate. For this purpose there are different guidelines to assist installers, including:
    • Electrical installation design guide – calculations for electricians and designers
    • On-site guide BS 7671:2008(2011) – IET wiring regulations, 17th Edition

Please contact the IET if you have further questions on the guidance.  

Please note each site is different and should be regarded as such to ensure the safety of the installation.

How to find your DNO using a Meter Point Administration Number (MPAN)

Digits 9 and 10 of the 21-digit Meter Point Administration Number (MPAN) are the Distributor ID. 

Using the table below (click image to open), the Distributor ID can be used to identify the DNO that you need to:

a)   Email your notification to.

b)   Telephone to request a supply assessment.

c)   Telephone to report safety concerns with existing equipment.

DNO Contact Details for EV Installers

If you have any queries regarding the above information, please contact [email protected]

FAQ for EV notification process

1.  When do I need to contact the DNO prior to installing a charge point?

Following a consultation with DNOs and representatives from the EV charging equipment community, the use of an Application form before the connection of EV charging equipment to a property will no longer be required.

Instead, DNOs have agreed that the best course of action is to contact the appropriate DNO directly in the instances where customers/installers are;

  • Where the MD calculations performed by the installer indicate that a property’s MD is greater than the known supply capacity
  • There are safety concerns over the cut-out, cut-out fuse, or any other existing equipment.
  • Uncertain of their supply capacity or the adequacy of their supply
  • Certain their connection requires an upgrade

The DNO will then assess the records of the property and confirm if the supply to the property is adequate or raise a job to assess the property directly and implement any interventions where necessary,.  The figure below illustrates this proposed process.

EV Installation Flow Diagram

This means that in addition to the ‘connect and notify’ requirement, if the new load will exceed the existing supply, or if there is a planned programme of charging equipment installations in a close geographic region, the DNO should be contacted well in advance of the installation. The purpose of this process is to allow a safety assessment of the electrical supply to the domestic property and the supporting network to ensure they are adequate.

Once the installer contacts the DNO, the information required to enable the DNO to carry out the assessment will include:

  • Full address of installation
  • 21-digit Meter Point Administration Number (MPAN) or 11-digit Meter Point Reference Number (MPRN) in Northern Ireland
  • Maximum demand (MD) of property including EV installation, concluded from a Load Survey
  • Property’s supply capacity (Must be verified by a DNO if MD exceeds 60A)(
  • Details of New EV charge point Installation – kVA/Amps
  • Earthing arrangements installed – Detail the final earthing arrangements that have been applied for the installation of the charging point as per BS 7671 e.g. protective multiple earthing (PME).

2.  Do all installations of EV charge points to existing properties require DNO intervention?

No, installations where the Maximum Demand of the property including the new EV charge point load is less than the rating of the supply equipment must be notified to the DNO post-installation.

3.  When do I need to make a notification?

Every time an installer or customer installs an electric vehicle charge point to an existing property, they must notify their DNO accordingly. Notification is the process whereby if the proposed addition/alteration is assessed by the installer to be within the existing rating of the supply equipment, then the EV charge point can be installed and the DNO will be notified retrospectively.

4.  How do I submit a notification form?

A notification or application form can be downloaded from the ENA website (link) and submitted directly to the network operator through the email addresses indicated (link)

5.  Who can submit a notification?

Anyone who is competent to install an EV charge point can submit a notification; including instances where the installer is working on behalf of the customer at that property.

6.  Will DNOs refuse the installation an EV charge point?

No, DNOs are obliged to facilitate the installation/connection of new loads to the power network, as part of their license condition.

7.  How long will it take for remedial works to be completed?

This will vary depending on the nature of the intervention required to deliver an adequate supply to the property being assessed. Each connection is different, so the premise and network must be assessed before providing an estimate time of delivery.

8.  What is Maximum Demand (MD)?

The Maximum Demand of a circuit, property, section of network, or network that considers that all loads associated with that network will not be drawn at the same time.

9.  How do I calculate the MD of a property?

There is guidance in the IET COP on supply adequacy (Maximum Demand) assessment. This information is critical to understand if the EV charge point will be supported by the network.  There are different approaches to determining a site’s MD, including:

  • Use existing information – this is the best approach when there is available data on the specific loads in the house. However, this may not always be the case.
  • Determine loads installed – this approach takes diversity into consideration where appropriate. For this purpose there are different guidelines to assist installers, including:
    • Electrical installation design guide – calculations for electricians and designers
    • On-site guide BS 7671:2008(2011) – IET wiring regulations, 17th Edition

Please contact the IET if you have further questions on the guidance.

Some installers chose to post their customers an internet connected monitoring device which connects to the customer’s internet router and clamps a split CT around the supply meter tail.  Data is then remotely collected over two weeks at ten minute intervals, before being analysed to arrive at an accurate MD without the need for a site visit.

10.  What is a cut-out?

A cut-out is a piece of electrical equipment that forms the link between your DNOs electricity cable and the internal wires in your property.

11.  How do I identify issues with the property’s cut-out?

There is guidance available from the National Association of Professional Inspectors and Testers (NAPIT) on identifying issues with distribution network equipment. Installers sometimes ask for photographs prior to site visit to save resource.

12.  How do I identify the rating of the cut-out fuse?

The rating of a cut-out fuse can usually be identified through a visual inspection of the cut-out.
In some cases a DNO may have to identify the rating of the cut-out fuse as it’s not always obvious

13.  What is an MPAN and where can I find it?

The MPAN (Meter Point Administration Number) can be found on a copy of the electricity bill for that supply.