EV Charger Installation RAMS Guide for UK Contractors

Key Topics in an EV Charger Installation RAMS

BS 7671 and IET EV CoP

EV charging equipment installation must comply with BS 7671:2018 (including Amendment 2:2022) and the IET Code of Practice for Electric Vehicle Charging Equipment Installation. The RAMS must reference both documents and confirm that the installation design and execution comply. This is a legal requirement, not a best practice.

DNO notification (G98/G99)

EV chargers connected to the Low Voltage network may require DNO notification under Engineering Recommendation G98 (single-phase, micro-generation) or G99 (three-phase or larger installations). The RAMS must confirm whether G98 or G99 notification is required, who submits it, and confirm notification has been submitted before commissioning.

Load assessment

The existing electrical supply capacity must be assessed before installation. A Type 2 AC charger at 7.4 kW represents a significant and sustained load. Where multiple chargers are installed, a load management or dynamic load balancing solution may be required to prevent supply overloading. The RAMS must reference the load assessment and any load management strategy.

Cable routing and protection

Cable routing in occupied car parks and external environments must consider: mechanical protection (SWA or conduit), thermal derating for cables in insulation or buried runs, physical protection from vehicle damage, and weatherproofing for external installations. The RAMS must describe the cable route, protection method, and any derating applied.

Testing and commissioning

Installation must be tested and commissioned in accordance with BS 7671: insulation resistance, continuity, polarity, earth fault loop impedance, RCD testing. Charger-specific commissioning procedure per manufacturer. An Electrical Installation Certificate (EIC) or Minor Works Certificate must be issued. The RAMS must confirm testing requirements and who issues the certificate.

Competence Wording

EV charging installation must be carried out by a competent electrician with appropriate knowledge of EV charging equipment. RAMS AI generates a starting framework; the RAMS must be reviewed by a competent person (an electrician with relevant EV CoP knowledge) before issue. The document does not guarantee compliance with DNO requirements or guarantee approval from any authority having jurisdiction.