Use the free text search and the search fields below to filter documents or find the document that you are looking for.
The Energy Networks Association (ENA) represents the interests of all energy companies in the UK. The Document Catalogue System is an online catalogue of engineering documents available from the ENA.
Documents available from the site include Technical Specifications, Engineering Recommendations and Reports, BEBS Specifications and reports supporting the electricity network process and policies.
Most documents are available to anybody but a small number are confidential to ENA member companies and can only be accessed by those member companies. The system allows clients that are not full ENA members to purchase documents by credit/debit card via secure transactions provided by WorldPay.
Energy Networks Association Limited4 More London RiversideLondon SE1 2AU
Tel: 020 7706 5100Email: Lauren Fisher
WARNING! Some of the older (pre 2003) documents available on this site were originally published by the now defunct Electricity Association. Please note that the ENA cannot take responsibility for the condition and content of these older documents and you are advised to seek advice before acting upon information held in them.
Guidelines for the design, installation, testing and maintenance of main earthing systems in substations
A guide for assessing the rise of earth potential at electrical installations
Recommendations for the connection of Generating Plant to the Distribution Systems of Licensed Distribution Network Operators
Resilience to flooding of Grid and Primary Substations
Technical guidance for customer Export Limiting Schemes
Requirements for the connection of Fully Type Tested Micro-generators (up to and including 16 A per phase) in parallel with public Low Voltage Distribution Networks on or after 17 May 2019
Requirements for the connection of generation equipment in parallel with public distribution networks on or after 17 May 2019
Overhead line fittings
Overhead Line Clearances
ENA Protection Assessment - Functional Test Requirements - Distance Protection
ENA Protection Assessment - Functional Test Requirements - Feeder Unit Protection
ENA Protection Assessment Functional Test Requirements - Transformer Protection
PVC and XLPE Insulated Concentric service cables with stranded copper or solid aluminium phase conductors and copper concentric neutral conductors
A guide for assessing the rise of earth potential at substation sites
Guidelines for the Provision of Low Voltage Connections to Multiple Occupancy Buildings
Energy Networks Association Ltd; Reg. Office: 4 More London Riverside, London SE1 2AU. Reg. in England No. 4832301
If you are already registered on the catalogue, you are advised to login for your own convenience. You are welcome to browse the catalogue as a guest if you prefer but you must be logged in to complete an order (
New visitors to the catalogue can register immediately if preferred but it is equally convenient for most to browse the catalogue as a guest and register if going on to order a document.
Users from ENA member (full/associate) companies are entitled to benefits. New member users should register as such and wait for confirmation that their registration has been approved before placing orders.
Please note that all orders are completed by email.