PAT testing your own tools — what self-employed sparkies, chippies and site managers actually need to do

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Right. Let's clear something up first. PAT testing is not, in itself, legally required by name. The actual law is the Electricity at Work Regulations 1989 — it requires you to maintain electrical equipment in a condition that's safe to use. PAT testing is one way of demonstrating that, not the only way. The HSE explicitly says so. We've been on sites where lads have been stopped from working because their drill didn't have a sticker on it. We've been on others where the entire kit had stickers three years out of date and nobody asked. Here's what's actually expected from working trades in 2026.

What the law actually requires

The Electricity at Work Regulations 1989, regulation 4(2), requires 'every electrical system to be maintained so as to prevent danger'. That's it. No mention of stickers, frequency, or PAT testers.

The Health and Safety at Work Act 1974 requires employers (including the self-employed working on others' premises) to provide safe equipment. Combined with Provision and Use of Work Equipment Regulations 1998 (PUWER) regulation 6, this means you need to ensure portable electrical equipment is safe.

'Ensure safe' is the operative phrase. PAT testing is one industry-standard way to do that. Visual inspection is another. The HSE's own guidance (HSG107) explicitly states that the level and frequency of testing should be proportionate to risk.

So when is PAT testing actually expected?

Two scenarios.

Working on a major contractor's site. Most Tier 1 contractors (Balfour Beatty, Kier, Mace, Skanska) require PAT-tested equipment by contract. Their site induction will ask you to present test certificates. This is not law — it's a contract requirement. But the practical outcome is the same: no current PAT cert, no work on site that day.

The frequency expected on major sites is typically annual for Class I tools (anything with an exposed metal earth path: drills, grinders, kettles in the site cabin) and twice-yearly for high-risk environments (regular site abuse, wet conditions, dropped repeatedly).

Working for letting agents and landlords. Some landlord insurance policies require PAT-tested equipment used on the property. Less common for visiting trades, but if you're doing recurring maintenance work for a large agency, ask.

Outside these two scenarios — domestic work, small commercial, agricultural — PAT testing is not contractually required and the HSE doesn't expect it. You still need to ensure your kit is safe. A user visual check before each job is what HSG107 actually demands for low-risk equipment.

What a user visual check actually means

Before every job, look at every mains lead and tool plug. Look for:

• Damaged outer sheath — cuts, abrasions, exposed inner wires.
• Cable strain or pull damage at the plug entry.
• Bent or burnt pins on the plug.
• Cracked or chipped casings.
• Loose internal components (rattle test).
• Burning smell or scorched components on the tool.

Spotted any of those — take it out of service. Repair, replace, or formally test before reuse. That's it. That's the formal compliance for most low-risk equipment under HSG107 — visual checks at the right frequency by the user.

Document it occasionally if your trade is high-risk. A simple notebook column for date and signature is enough to satisfy a site inspector.

Self-PAT testing — is it allowed?

Yes. The 1989 Regulations don't restrict who tests, only what test results must show. The Code of Practice (5th edition, IET) recognises self-testing by competent persons.

'Competent' is defined as having the technical knowledge or experience to do the test, understand the results, and act on them. A working electrician with C&G 2391 inspection and testing already qualifies. A non-electrician with basic City & Guilds 2377 (PAT testing) certification qualifies. A bloke with no certification who's read a YouTube guide does not, even though the tester will still beep.

So if you're already a working sparky with 2391, you can PAT your own kit. If you're a chippy who's done a one-day 2377 course (about £150-£200), you can PAT your own kit and that of your team. If you've done neither, get someone competent to do it.

What a self-PAT testing kit costs

The PAT tester market has consolidated to roughly three tiers:

• Pass/fail basic testers — Megger MFT1730 family at around £300-£400, or KEW 6010 at about £180-£240. Decent for solo trades doing 50-100 tools a year. Limited record-keeping.
• Mid-range with logging — Seaward Primetest 100 at about £450 or the Martindale HPAT600 at around £350. Built-in logging, prints labels with a separate £150 thermal printer.
• Pro-grade with Bluetooth and software — Seaward Apollo 600+ at £750-£950, Megger PAT420 at £900-£1,200. Full database, cloud export, professional certificate generation. Worth it if you're testing 200+ items a year or for a small firm.

Plus you need labels (£20-£40 for a roll), record-keeping software or spreadsheet template (free), and a backup test instrument is sensible if PAT income is significant for you.

The honest economics

Three scenarios.

Solo trade, small toolkit (15-25 mains-powered items), domestic-only work. PAT testing yourself doesn't make economic sense. Pay a local PAT tester £40-£80 once a year to do the lot. Even better, swap services with a colleague — chippy does the sparky's wallpaper stripper, sparky does the chippy's drill, both walk away with paperwork.

Solo trade, full toolkit (50+ items), some commercial work. Buy a mid-range tester. £450 of kit pays for itself in two years vs paying someone £150/year to test for you.

Small firm with 4+ trades. Buy a pro-grade tester, train one person on 2377, get a free record-keeping app like ZeroDB or a paid one like Seaward's PowerSuite. Saves £600-£1,200/year in external testing fees and you can do client testing as additional revenue.

What goes wrong with self-testing

Common problems we've seen:

• Labels falling off. Tradesmen's tools live a hard life. Get the proper laminated labels (Brady, Seaward) — they cost more but stick. Avoid the basic paper ones.
• Insulation resistance failures on cheap power tools. Some Chinese-import drills and grinders fail PAT first time because of poor moulding around the casing. Not necessarily dangerous, but they fail the test. Worth knowing before you buy the tool.
• Lithium battery chargers showing odd earth readings. Most modern chargers are Class II (double-insulated) so they don't need an earth bond test — just a flash test and load test. Make sure your tester is set up correctly for Class II — wrong setting and you'll see false fails.
• Battery-powered tools. Don't need PAT testing themselves — they have no mains connection. But the charger does, and the battery itself should be visually inspected for damage every job.

Sticker fraud — the bit nobody talks about

You can buy PAT testing stickers on a popular auction site for £4 a roll. Some unscrupulous trades have used them. This is a criminal offence under the Fraud Act 2006 if the equipment hasn't actually been tested and the sticker is being used to obtain work that requires testing. It's been prosecuted.

Don't do it. The financial saving is tiny, the legal exposure massive, and on a site with a competent inspector you'll be spotted within a single review.

The frequency table — what to actually do

HSG107 recommends frequencies based on risk. Adapted to working trade context:

• Hand-held Class I tools (drills, grinders, jigsaws, planes) — visual every use, formal test every 6 months for site work, 12 months for domestic.
• Class II hand-held tools (double-insulated) — visual every use, formal test every 12 months for site work, none required formally for domestic-only.
• IT and office equipment in site cabins (kettles, microwaves) — visual quarterly, formal test annually.
• Extension leads — visual every use, formal test every 6 months. Highest-failure-rate item by a long way.
• Site lighting and transformers — visual every use, formal test every 3 months for hire kit, 6 months for owned.

Extension leads deserve special mention. They're the most-failed PAT category — typically 18-25% fail rate on professional sites — because they get run over, kinked at the strain relief, and used for far too long without retirement. We'd argue most trade extension leads should be binned and replaced every 24 months regardless of testing.

What the inspector actually wants to see

On a real site visit, an HSE inspector or major contractor's safety officer will typically check:

1. Visible label or sticker on the tool showing test date and unique identifier.
2. Test certificate or register matching the unique identifier.
3. Test instrument calibration certificate (your tester needs to be calibrated annually — typically £80-£120).
4. Competence of the tester (qualification certificates).
5. Risk assessment showing why your frequency choice was appropriate.

The risk assessment is what most trades miss. The default position 'we test annually because that's the standard' is fine for most sites. But if you're working in a regular wet environment, dropping kit a lot, or running tools to their thermal limits, six-monthly testing is what an inspector expects and you should be able to articulate that.

The bottom line

PAT testing isn't legally mandatory by name. Equipment safety is. For most working trades, the practical compliance is:

1. Visual user check before every use — non-negotiable.
2. Annual formal PAT test (yourself if competent, or paid £40-£80 for an external visit) — covers the major-contractor and insurance requirements.
3. Documented record-keeping — simple notebook or app.
4. Retire kit at end of useful life, don't 'just retest' damaged items.

Spend £20 a year on labels. Keep a record. Throw out the dodgy extension leads. That's 95% of what you actually need. Don't be the firm that loses a contract over a missing sticker — and don't be the firm that ignores the visual check and ends up in court because a chippy got electrocuted from a damaged lead nobody bothered to look at.