A vehicle workshop is one of the most electrically hostile environments in ordinary commercial life: moisture and coolant on floors, metalwork everywhere, trailing leads dragged under vehicles, welders and compressors cycling all day, and now high-voltage battery systems arriving on the ramp. The law’s response, the Electricity at Work Regulations, is deliberately broad - it imposes duties on employers and employees to keep electrical systems safe - and HSE’s electrical safety guidance turns that into workable practice. The gaps tend to sit where myths have replaced the actual duties.
The legal requirement is that electrical systems are constructed and maintained so far as reasonably practicable to prevent danger. That is a whole-system duty: the fixed installation, the distribution boards, the portable tools, the leads, and the way people use them. It is not a requirement to PAT test everything once a year - a point HSE makes directly in its guidance on portable appliance testing, which explains what PAT actually is and what the law does and does not say. PAT is one way to check portable equipment; the law requires that equipment be maintained, full stop. A sensible workshop programme combines user checks (the lead with the taped joint, the cracked plug), formal visual inspection on a risk-based schedule, and combined inspection and testing for the equipment that needs it. A kettle in the office and a grinder used daily over a wet pit do not deserve the same regime, and the regulations do not ask them to get one.
Portable equipment gets the attention because it is visible, but the fixed electrical installation is where workshop incidents grow teeth. Distribution systems in older workshops were often designed for a fraction of today’s load - before the second compressor, the welder, the tyre machine and the row of battery chargers. The installation should be inspected and tested periodically, and additions should be designed, not improvised: the extension lead daisy chain feeding a bank of chargers is a fire load and an overload waiting for a busy week. Residual current protection on circuits feeding portable equipment used in damp or conductive conditions is a basic layer that still gets missed in older buildings.
Workshops now host two distinct electrical risk profiles. The conventional one is the vehicle’s own low-voltage system plus mains equipment used on it. The new one is high-voltage electric vehicle systems, where the stored energy and voltages involved are in a different league from anything the average fitter trained on. The working principles from HSE’s guidance apply to both: work dead wherever possible, isolate and prove dead before work, and make sure the people doing the work are competent for it. For EV work, competence is the operative word - a technician trained on 12-volt systems is not thereby equipped for a 400-volt battery pack, and the market now offers specific EV training for exactly this reason. If your workshop takes electric vehicles, the training decision is a safety decision before it is a commercial one.
The reason electricity injures more readily in workshops than in offices is environmental: the body standing on a wet conductive floor, leaning on a metal vehicle, is an excellent path to earth. Controls follow from the physics. Keep equipment and connections dry or rated for the conditions; route leads where vehicles and trolleys will not crush them; use lower-voltage or battery tools where the job allows; and make damaged equipment easy to report and quick to quarantine - a fitter who cannot get a replacement lead will use the damaged one. HSE’s injury guidance notes that risk generally rises with voltage and depends on circumstances, which is why the 110-volt centre-tap-to-earth site equipment familiar from construction is worth considering for the roughest portable uses.
Electrical safety fails administratively more often than technically: nobody owns it. The fix is unglamorous. Appoint who is responsible for the electrical regime - the installation inspection cycle, the portable equipment checks, the quarantine of damaged kit. Keep the records simple but real: what was checked, when, what was found, what was removed from service. Brief staff on the checks they personally make before use, because the user check catches more damaged leads than any annual programme. And treat near misses - the scorched plug, the tripping breaker everyone learned to reset - as the free warnings they are.
Electricity in a workshop does not forgive inattention, but it rewards routine. Systems maintained, equipment checked, people competent, damage quarantined: that is the whole architecture. The businesses that get hurt are rarely the ones that ignored an exotic hazard - they are the ones where a damaged £15 extension lead became normal, and stayed normal until the day it was not.