Parts 6, 7 and 8 — and one appendix that has vanishedWhere do the special locations live?

Part 6 — deliberately skipped

Part 6 (inspection and testing) and Appendix 6 (the certification forms) aren't covered here on purpose: inspection and testing is a subject of its own, so this stays on what the 18th Edition exam needs.

Chapter 65 — periodic inspection

• Periodic means the installation already exists and is in service — it isn't a new install.
• In rented and council property it's required at least every five years, a requirement that came in a few years ago. A change of tenancy is a time when one is recommended, not required.
• It doesn't matter whether you installed it. Ten or fifteen years on, a cable in good condition in a system that isn't overloaded can still have 25–30 years in it — the periodic exists to confirm that, whoever put it in.
• Chapter 65 also covers the frequency of periodic inspection and reporting. A typical question asks which factor is not a consideration in setting the interval: the answer is condition of the appliances.

Part 7 — special locations

A long list of special locations, a very thick slab of book, and seven exam questions drawn from all of it. Going through every one would take a week and you'd remember none of it. The only thing you need is to recognise that a location is special, and go to Part 7 and nowhere else.

The zone drawings for bath and shower rooms are in there too, in black and white rather than colour, but they're the same line diagrams you've already seen. Two figures worth restating: minimum IPX4 for equipment in zone 1, rising to IPX5 where water jets are used for cleaning.

Part 8 — the prosumer's installation

Part 8 holds Chapter 81 (energy efficiency) and Chapter 82 (the prosumer's low voltage electrical installation, PEI). It's only a handful of pages, because it's the newest material in the book — and it's covered in amendment change bars. Nearly every recent amendment has touched it.

PEI

Prosumer's electrical installation — an installation that both consumes and produces electricity. Think PV, battery storage, a wind generator, bidirectional EV charging, all tied into an electrical energy management system.

Island mode

Fully off grid — every part of the prosumer's installation disconnected from the incoming supply, drawing nothing from the public network.

Energy efficiency now appears in Chapter 81 — but Chapter 81 talks about energy efficiency without giving that value, so that answer genuinely isn't in the current book. The exam is set against the current edition, so don't expect Appendix 17 questions.

651 · purpose of periodic inspection ★ Chapter 65 · frequency of periodic inspection and reporting Part 7 · special locations · 7 exam questions ★ 701 · 702 · 703 · 704 · 705 · 714 Chapter 81 · energy efficiency Chapter 82 · 823 · 824 · 825.1 · 826 · prosumer's installation ★ Appendix 17 · deleted from the current edition ★ Appendix 6 · certification forms (covered later)