Insulated working under impressed voltage conditions (NSI5 equivalent for contractors)

The Insulated Working Under Impressed Voltage Conditions (NSI5 Equivalent) course provides essential training for contractors and operatives who work on or near high-voltage equipment. This accredited programme equips delegates with the skills and knowledge to safely carry out live working on insulated electrical systems under impressed voltage conditions, ensuring compliance with industry safety standards.

Designed to meet National Grid and ENA (Energy Networks Association) requirements, the course covers the principles of insulated working, hazard recognition, and safe working practices to minimise risk when working on live circuits. Delegates gain practical awareness and competence to perform tasks safely on high-voltage substations, overhead lines, and cable networks while complying with statutory and company procedures.

This training is suitable for all personnel involved in projects near high-voltage infrastructure, including contractors, engineers, site operatives, and supervisors, and provides nationally recognised NSI5-equivalent certification.

This course is designed to provide guidance and best practice for those working on or in proximity to National Grid Electricity Transmission (NGET) assets, it references NGET procedures and industry practices to support understanding and application in the workplace. It is not an official NGET training course and is not endorsed by or delivered on behalf of NGET.