A plain-English guide to the wiring regulations that keep your property safe — and why every homeowner should know the basics.
If you've ever had an electrician round and heard them mention 'the regs', they're almost certainly talking about BS 7671 — the IET Wiring Regulations. It's the rulebook that every electrician in the UK works to, and understanding the basics of it can help you make better decisions about the electrical work in your home or business.
BS 7671 is the national standard for electrical installations in the UK. The 'BS' stands for British Standard, and 7671 is simply its reference number. It's produced by the Institution of Engineering and Technology (IET) and sets out how electrical systems should be designed, installed, inspected, and tested.
Think of it like building regulations, but specifically for electrics. Just as a builder has to follow rules about foundations and roof structures, an electrician has to follow BS 7671 to make sure your wiring is safe.
Electricity is incredibly useful — but it can also be incredibly dangerous. Poor wiring causes house fires, electric shocks, and in the worst cases, fatalities. BS 7671 exists to prevent that. It sets minimum standards so that every electrical installation in the country meets the same basic level of safety.
BS 7671 is updated regularly as technology evolves. The current edition is the 18th Edition, which was published in 2018 and has been updated with amendments since. Each update takes into account new technology like EV chargers and solar panels, changes in how we use electricity, and lessons learned from incidents and accidents.
BS 7671 covers pretty much everything to do with electrical installations, including how cables should be sized and routed, where sockets, switches, and light fittings can be placed, how to protect against electric shock and fire, testing and inspection requirements, special locations like bathrooms and gardens, and EV charging points and solar PV systems.
Yes — whether you're a homeowner, a landlord, or a business owner, BS 7671 applies to any electrical installation on your property. If you're having electrical work done, your electrician is required to work to these standards. If they don't, the work could be unsafe, uninsurable, and potentially illegal.
When you hire a NAPIT-approved electrician like Zeno Electrics, you can be confident that all work is carried out to the current edition of BS 7671, and that you'll receive a certificate to prove it.