Electrical RAMS Guide for UK Contractors

Key Topics in an Electrical RAMS

Safe isolation and lock-off

The RAMS must describe the isolation procedure in full: which circuit or distribution board is isolated, who carries it out, how the circuit is proved dead (GS38 two-pole voltage test: test tester, test circuit, test tester), and how the isolation point is secured with a lock-off device and personal danger tag.

Concealed cables and services

CAT/Genny scan before drilling or chasing. As-built drawings reviewed. No drilling without confirming cable-free zone. The RAMS must name who carries out the scan and what plans are consulted.

Competence

Reference to ECS card grade (approved electrician, qualified person) or JIB grade. For HV work, Duty Holder authorisation is required. The RAMS should name the site supervisor and their qualification.

Testing and commissioning

Live tests carried out only by competent persons with GS38 test equipment and appropriate PPE. Test results recorded. Sequence: insulation resistance, continuity, polarity, earth fault loop impedance, RCD testing.

Emergency arrangements

Electric shock response: do not touch casualty until supply is isolated; isolate at source; call emergency services; CPR only when safe. Named first aider with electric shock training. CO² or dry powder extinguisher for electrical fires only.

Common Electrical Hazards

• Contact with live conductors — safe isolation, lock-off, prove dead, GS38 test leads
• Silica dust from drilling masonry — wet drilling or dust extraction, RPE (FFP2) for extended periods
• Working at height for containment — podium steps or tower scaffold; no sustained work from ladders
• Manual handling — cable drums, distribution boards; mechanical aids and team lifts where required