This web page is published by UK Power Networks primarily to provide Application and Commissioning Notification information to Installers (and Developers) of Low Voltage generation with a rating of not more than 16 ampere per phase, so-called Small Scale Embedded Generation (SSEG). UK Power Networks' arrangements for connecting larger generation are also described.
In accordance with the Energy Networks Association's G83/1 Engineering Standard for connecting SSEGs, and the Installers' and Distribution Companies' statutory obligations under the Electricity Safety Quality and Continuity Regulations 2002, UK Power Networks has made arrangements for managing the Commissioning Notifications for installation of SSEG units and for the Application process for project installation of multiple SSEG units in a particular premise or location, as might occur on development or refurbishment projects. These arrangements are detailed below.
G83 Commissioning Notification
For Developers or Installers installing an SSEG unit, either as a one-off installation or as part of a multi-unit SSEG installation project, UK Power Networks requires a notification to be submitted, providing details of each individual SSEG unit before or not more than 28 days following installation.
Please use and complete the notification form provided (see links below) and send to the contact point listed on the commissioning form. It is available either as a Word document or as a PDF.
Please note that notification to the Distributor of the installation of low voltage generation up to 16 Ampere per phase is a legal obligation upon the Installer under regulation 22(2)(c) of the Electricity Safety Quality and Continuity Regulations 2002.
G83 Multi-unit installations
Before UK Power Networks permits connection of multiple SSEG units, i.e. as part of a development or refurbishment scheme, we require an application to be submitted by the Developers or Installers for consent from UK Power Networks. The application will need to include the details of the intended project as part of the process of obtaining consent from UK Power Networks.
The application will enable UK Power Networks to plan and to advise you of any works that might be necessary to enable safe connection of the intended number and type of SSEG Units in the given location.
Please use and complete the multiple installation application form provided (see links below) and send to the contact point listed on the application form. It is available either as a Word document or as a PDF.
The application will enable UK Power Networks to advise you of any works that might be necessary to enable safe connection of the intended number and type of SSEG Units in the given location.
Arrangements for connecting Larger Generation outside the scope of G83/1
Before any party is permitted to connect to UK Power Networks' distribution networks any generation larger than that allowed under Energy Networks Association's Engineering Standard G83/1, UK Power Networks require the developer or customer to contact UK Power Networks as early as possible to discuss requirements and ensure our network is suitable for the connection of the intended generation. UK Power Networks will only give consent where the network is suitable and appropriate commercial and safety arrangements have been put in place prior to the connection of such generation.
UK Power Networks do not permit connection of the following generation sizes without prior consent:
- Any generation at Low Voltage whose collective rating, intended to be connected to a specific connection point, would exceed 16 Ampere per phase.
- Any generation intended to be connected at higher voltages, e.g. High Voltage (HV) or Extra High Voltage (EHV)
Please contact UK Power Networks on firstname.lastname@example.org or call us on 0845 234 0040 if you wish to connect or increase the size of generation to a capacity greater than that allowed under the Energy Networks Association's Engineering Standard G83/1.
Statement on Connection Terms for Low Voltage connected premises
Customers with Low Voltage installations should be aware that their present terms for use of their connection to UK Power Networks' Distribution System may require the customer to seek and be granted prior consent from UK Power Networks before any source of electricity generation is connected.
UK Power Networks hereby affirm that where the Customer's present terms for use of their connection to UK Power Networks' Distribution System require prior consent from UK Power Networks for the connection of generating equipment to the Customer's premises UK Power Networks waives that obligation in the circumstance where the intended sources of electricity generation are to be connected in parallel with UK Power Networks' Low Voltage Distribution System and will have an aggregate rating of not more than 16 ampere per phase inclusive of all existing sources of electricity generation connected within the premises subject to the Customer ensuring that the installer (or the Customer by default) shall notify UK Power Networks in accordance with the Electricity Safety, Quality and Continuity Regulations 2002.
For the avoidance of doubt, a person installing sources of electricity generation, for which prior consent is not required from the distributor, remains statutorily obliged to notify UK Power Networks in accordance with the Electricity Safety, Quality and Continuity Regulations 2002 irrespective of the Customer's terms for use of their connection to UK Power Networks' Distribution System.
Other Useful Information
Energy Networks Association
UK Power Networks is a member of the Energy Networks Association, which provides extensive industry, technical and guidance information related to the design, planning and connection of small scale embedded generation and larger generation of their website.
This can be found at: www.energynetworks.org
The Micropower Council is a newly established co-ordinating association on matters relating to various types of small scale generation. Their site contains many useful links to other trade and energy efficiency associations and much more. The Micropower Council’s website can be found at www.micropower.co.uk
Glossary and Definitions
- Recommendation for the connection of Small-Scale Embedded Generation (Up to 16A Per Phase) in Parallel with Public Low-Voltage Distribution Networks. The scope of Recommendation G83/1 includes Small-Scale Embedded Generation (SSEG) rated up to 16 Ampere per Phase and connected at Low Voltage to the public distribution network.
- means Small Scale Embedded Generation as defined in Engineering Recommendation G83/1.
- means, in the context of this publication, a single alternating current supply provided by UK Power Networks at a voltage of 230 volts as measured between phase and neutral conductors as specified in Regulation 27(2) or 400 volts as measured between any two phase conductors and subject to the permitted variance in voltage in accordance with Regulation 27(3) of the Electricity Safety, Quality and Continuity Regulations 2002.In accordance with Regulation 1(5) of the Electricity Safety, Quality and Continuity Regulations 2002, the recognised low voltage range for an alternative current supply is a voltage exceeding 1000 volts as measured between any two phase conductors
- means, in the context of this website, a supply at voltages above a Low Voltage.
UK Power Networks define the High Voltage range as a voltage higher than 1000 volts but not exceeding 20,000 volts and the Extra High Voltage range as a voltage higher than 20,000 volts.