Understanding Your Electrics — Part 3
Why Sockets and Switches Have to Go Where They Go
By Frankie · March 2026 · 5 min read
I get asked this a lot: “Can you put a socket there?” Sometimes the answer is yes straightforwardly. Sometimes it’s yes but not in that exact spot. And occasionally it’s no — and when I explain why, people are usually surprised there’s a specific rule rather than just caution.
The Bathroom — The Strictest Zone
BS 7671 divides bathrooms into defined zones based on proximity to water sources. Zone 0 is inside the bath or shower itself. Zone 1 is above the bath up to 2.25 metres. Zone 2 extends 600mm outward from the bath edge. Each zone has rules about what electrical equipment can be installed, what IP rating it must have, and what voltages are permitted.
What’s not permitted in a bathroom:
✕ Standard 13A sockets — anywhere in the room
✕ Standard plate light switches — anywhere in the room (pull-cords or outside-the-door switches only)
✕ Portable heaters with flex and plug — anywhere
What is permitted:
✓ Shaver socket (BS EN 61558-2-5) — outside Zone 1, typically at mirror height
✓ Pull-cord ceiling switch — for lighting and electric showers
✓ Fixed-wired heated towel rails, extractor fans, and lighting with appropriate IP ratings
Kitchens — The Splash Zone Rule and Dedicated Circuits
Sockets should not be installed within 300mm either side of a sink. Beyond that, there’s no blanket prohibition. The more important kitchen consideration is dedicated circuits for large appliances: cookers must have their own dedicated circuit controlled by a cooker switch, and washing machines, dishwashers, and tumble dryers should ideally be on dedicated circuits.
Socket Heights — More Guidance Than Regulation
For new dwellings, Part M of the Building Regulations recommends socket outlets between 450mm and 1200mm from the finished floor level. For existing dwellings, conventions are: sockets at approximately 300mm above skirting board level, switches at approximately 1400mm from floor. Neither is a hard rule — both are conventions that make sense as defaults.
Outdoor Sockets — IP Ratings and RCD Protection
Any socket installed outside must be IP-rated: IP44 minimum for outdoor locations, IP65 or higher for fully weatherproof. All outdoor socket circuits must be protected by an RCD with a maximum trip current of 30mA. This is non-negotiable.
Why Do These Rules Actually Exist?
Every placement rule exists because of specific failure modes that have caused injuries or deaths. They’re conclusions from incident analysis, applied as requirements to prevent the same thing happening again. When I tell you something can’t go where you want it, that’s what’s behind it. And almost always there’s a compliant alternative that gets you most of what you wanted.
Frankie Sewell
NICEIC Approved Contractor • YRLA Recognised Service Provider • Bright Sparks of York
Need more sockets, or want to know where they can go?
Most socket additions in York are a half-day job. I’ll tell you what’s possible where, and give you a clear price before starting.