Electric and Magnetic Fields

The question of whether electric and magnetic fields are linked in any way to ill-health is a long standing one which still has no conclusive answer.
ENA and the rest of the energy sector is committed to providing all members of the public and the industry’s employees with full and up-to-date information on the issue.

ENA takes any suggestion of a risk to health extremely seriously. ENA believes that the final decision about what constitutes a safe level of exposure should be made by the Government, advised by the Health Protection Agency.

EU Directive

The EU passed a Directive on occupational exposure to EMFs in 2013 (it was published in the Official Journal on 29 June 2013).

This replaces the earlier 2004 Directive, which was deemed to be unworkable and never implemented, and is the final version of the 2011 draft.

It is closely based on the guidelines published by ICNIRP - in the case of power frequencies, ICNIRP 2010.

There was a three year period for member states to bring it into effect.  In the UK, this happened through the Control of Electromagnetic Fields at Work Regulations 2016, which came into effect on 1 July 2016, i.e. using the full three-year period. 

The ENA EMF Strategy Committee  have developed a risk assessment and information sheet which can be found below. 

New Exposure Limits Training Video for Electric and Magnetic Fields (EMFs)

Doctor John Swanson, who looks after electric and magnetic field issues (EMFs) for National Grid and through Energy Networks Association (ENA), provides a lead for the rest of the electricity industry. New occupational exposure limits for EMFs in the UK came into force on 1 July 2016. In this video, John provides a short summary on EMFs for the benefit of employees working within the electricity industry and provides an overview on the new legislation in force explaining what the electricity industry has done to ensure compliance but above all keep workers and the public safe.

More information on the EMFs.info website 


Risk Assessment

The industry maintains a single Risk Assessment document that collects together all the information on each different plant item or work practice.  This Risk Assessment encompasses generation, under the auspices of Energy UK, as well as transmission and distribution, under the auspices of Energy Networks Association.
Download Risk Assessment  (pdf 2MB) 

Information and Training

The industry provides this information sheet with all the key basic information that all staff need to be aware of.
Download the EMF Information Sheet v1 (pdf 160 kB)

Stakeholder Advisory Group on ELF EMFs (SAGE) Precautionary approaches to ELF EMFs

Exposure limits

All UK electricity systems comply with the exposure limits in force in the UK, and, as an additional precautionary measure, with a policy of optimum phasing. The details of these are set out in three Codes of Practice agreed with Government and can be found on the BEIS website here.

The industry also publishes detailed evidence of compliance with the exposure limits.


ENA is committed to supporting high-quality independent research to help get closer to a final answer on the EMF issue.

For details of ENA-funded EMF research, please see:

More information

  • ENA produced EMFs: The Facts in January 2007, with updates in April 2007, October 2009, December 2009, January 2012, June 2013 and September 2017.

  • Further information is available from www.emfs.info