4.1 What Is Prescribed Electrical Work

4.1 What Is Prescribed Electrical Work

Prescribed electrical work (PEW) is not a trade slang label for “anything electrical.” It is a legal category under the Electricity Act 1992 and the Electricity (Safety) Regulations 2010 (ESR 2010). Once an activity is PEW, the competence, authorisation, supervision, testing, and certification rules of the statutory scheme apply. Once it is not PEW, those PEW-specific gates generally do not—though other safety duties may still apply. The regulations examination repeatedly tests whether you can classify the activity correctly before you open risk-category or certificate rules.

Legal meaning: work reserved to authorised persons

At the level you need for this exam, PEW means electrical work that the Act and Regulations control: it may be carried out only by people who hold the right registration class and current practising licence, or by trainees / limited-certificate holders under the supervision model the scheme allows, or under any other narrow lawful pathway the Regulations recognise.

That control exists for public safety. Shock, fire, and latent faults are not solved by good intentions. The register and practising-licence system answer who may alter how electricity is conveyed or used in fixed systems. When a stem asks “who may do this work?” the first fork is almost always:

1. Is the activity PEW?
2. If yes, is this person authorised for that PEW?

If the activity is not PEW, you do not invent PEW certificate duties. If it is PEW, you do not treat it as ordinary DIY or ordinary appliance use.

PEW versus non-PEW — examples that exam writers use

Exact lists live in the Regulations and Board materials. For exam reasoning, master patterns, not a fantasy exhaustive catalogue.

Connection versus plug-in is the highest-yield trap. “Connecting the new permanently wired heater to the circuit” is PEW territory. “The homeowner plugged the portable heater into an existing outlet” is ordinary use. Fuse-carrier scenarios test whether the person is making a connection or only inserting a carrier after the installation has already been connected lawfully—read the stem carefully.

Design versus carrying out is the second trap. An engineer or designer may specify a compliant layout; carrying out PEW on site still requires an authorised electrical worker (or lawful supervised pathway). Do not award PEW authority merely because someone produced drawings.

Installations, fittings, appliances, and works

ESR definitions decide how rules attach. Chapter 3 stressed: define first, apply second. For PEW classification, four clusters dominate:

Installation — the consumer-side electrical system (as defined) where most building PEW, certification after PEW, and “safe to connect” questions live. Domestic, commercial, and industrial installations are the usual exam setting for Electrician pathways.

Works — network / generation / conveyance context distinct from a consumer installation. Do not blur “works” with “installation” when a stem places activity on the network side. Different duties and actors may apply.

Fittings — equipment used in generation, conversion, transformation, conveyance, or use of electricity as defined—the hardware of the system (cables, switches, boards, outlets, and similar). Much PEW is work on fittings that form part of installations or works.

Appliances — utilisation equipment with its own safety track. Maintenance or service of appliances may be PEW within class limits (or sit with narrower classes such as EAS), but user operation of a compliant appliance is not PEW. Separating appliance service PEW from fixed-wiring PEW prevents wrong-class answers.

If the contested word is in the stem, open definitions before you open risk categories.

Why PEW classification drives who may work and what certificates issue

PEW is the control gate for the rest of the PEW domain (this chapter) and the certification domain (next chapter):

• Who may work — registration class + practising licence + limits of work (and trainee supervision where applicable).
• What risk category — low, general, or high under ESR; category is assigned to PEW, not to “jobs” generically.
• What certificates — low-risk often follows a simpler ESC path; general-risk requires a Certificate of Compliance (CoC) under the reg 65 framing and an Electrical Safety Certificate (ESC) under the reg 74A framing when connection safety must be certified; high-risk adds Record of Inspection (RoI) by an Electrical Inspector under the reg 72 framing before connection is treated as free.
• How long records are kept — certification records are retained for at least 7 years (regs 72A(1)(b), 74E(3) and 74G(1)(b)).

If you misclassify non-PEW as PEW, you invent certificate duties. If you misclassify PEW as “just a favour for a mate,” you miss authorisation and certification offences. Classification is not paperwork pedantry—it is the legal identity of the work.

Exam application checklist

1. Identify the physical activity (install, alter, connect, design, plug-in, insert carrier, service appliance).
2. Locate the object (installation / works / fittings / appliance).
3. Decide PEW or not PEW using definitions and common patterns above.
4. Only if PEW: ask class, licence, supervision, risk category, and documents.
5. Do not skip step 3 because the stem mentions electricity.

Master this section as the entry filter. Risk categories, supervision rules, and high-risk inspection all assume you already know you are inside PEW.