No regulation anywhere sets a PAT interval, which is why every answer you find differs. The duty is to maintain electrical equipment so as to prevent danger, and the intervals everybody quotes come from the industry code of practice, which builds them from three things: what the equipment is, how it is used, and where. Once those three are in front of you the interval is obvious, and it is usually months on a site and years in an office.
PAT test requirements, and what the duty actually is
The requirement is that electrical systems and equipment are maintained so as to prevent danger, so far as is reasonably practicable. Nothing says test, nothing says annually, and nothing says label. What follows from that wording is a THREE LAYER regime rather than a visit: a user check before use, which is where most faults are actually found and which costs nothing; a formal visual inspection by somebody trained, which catches damaged leads, cracked plugs, wrong fuses and misuse; and a combined inspection and test with instruments, which finds what the eye cannot, such as a broken earth inside a lead. The employer decides the frequency of each, records the decision and its reason, and revisits it when the work changes. A business that tests everything annually and does no user checks has bought the expensive layer and skipped the effective one.
How often are pat tests required, by equipment class and type
Two properties of the item drive most of the answer. Its CLASS: class I equipment relies on an earth connection, so a broken earth is a real hazard and a test is the only way to find it, while class II equipment is double insulated and needs no earth, so a visual check does most of the work and testing matters less. And its TYPE: handheld equipment gets the hardest life and the shortest intervals, moveable and portable items next, then stationary equipment that stays where it is put, then fixed equipment, which belongs to the fixed installation's own regime. Put those together and the pattern is that a class I handheld tool is the item to test often, a class II stationary monitor is the item to leave alone for years, and an extension lead sits near the top of the list whatever the paperwork says.
PAT testing frequency uk environments are worked to
The environment multiplies everything. A construction site is the harshest: the published guidance is a user check before use, a formal visual inspection monthly and a combined inspection and test every three months for 110 volt equipment, and there is no serious argument with those figures. Industrial premises and commercial kitchens sit next, in months rather than years, because of heat, water, dust and the way equipment is treated. Equipment hire is its own case: inspected before every issue and on every return, whatever the calendar says. Public use equipment is inspected frequently because the user cannot be relied on to check anything. Offices, shops and hotels are at the gentle end, where the guidance runs to years for most items and where the sensible practice is a thorough formal visual programme with testing concentrated on class I handheld items, leads and anything that moves.
How long is a pat test valid for, and what the label date means
A test has no legal validity period, and the date on the label is the tester's RECOMMENDATION for when the item should next be looked at, based on the three factors above. That has two consequences people find surprising. An item whose label has passed its date is not unlawful to use, it is overdue for inspection under the employer's own programme, and the employer is the one who set the date. And an item with a current label can be unsafe today, because the label describes a moment in the past, which is exactly why the user check before use is the layer that matters. What makes a programme defensible is the written decision about intervals plus the register showing it was followed, not the stickers.
How often should pat testing be carried out on a building site
Shortest intervals of any environment, and the reason is visible on any site: leads get driven over, tools get dropped, transformers sit in the wet and everything is plugged and unplugged all day. The published regime for 110 volt site equipment is a user check before each use, a formal visual inspection each month and a combined inspection and test every three months, with 230 volt equipment on site treated at least as strictly because it is the higher hazard. Two site specific habits matter more than the interval. Quarantine, meaning a physical place damaged equipment goes and a rule that it does not come back without a test. And hire equipment arriving with its own current paperwork, checked at the gate rather than assumed, because a hired breaker with a six month old sticker is the commonest failure found on site.
How often do you need pat testing on new equipment
New equipment does not need testing when it arrives. It is supplied to the relevant safety standards, it has not been used, and putting an instrument on it proves nothing that the manufacturer has not already certified. What it needs is a visual check that it arrived undamaged, the correct fuse in a moulded plug where that applies, and an entry in the register with a date so that its first inspection falls due at the right point. Where new equipment does get tested immediately is where the buyer cannot rely on the supplier, which in practice means second hand purchases, auction lots, imports without proper marking, and anything that has been repaired or rewired, and a repaired item is a new item for this purpose.
How often should a pat test be done on IT and stationary kit
This is where most money is wasted. A desktop computer, a monitor, a printer or a network switch sits on a desk for years, is never moved, is never in the wet and is usually class II or class I with a moulded lead. The guidance for that category is intervals measured in years for the formal visual inspection and, for many items, no routine instrument test at all beyond the periodic visual, with the notable exception of the detachable mains LEADS, which are class I, are pulled and trodden on constantly and are worth testing on their own cycle. A programme that tests three hundred monitors annually and never looks at the extension leads under the desks has the risk exactly the wrong way round.
How long do pat tests last in a rented property
The same answer as everywhere, with one twist about who the duty falls on. There is no interval in law; the landlord's duty over appliances they supply is to keep them safe, which is discharged by inspecting and testing them at a sensible interval and keeping the register. The twist is national: in Scotland the landlord's own fixtures, fittings and appliances sit inside the repairing standard and the five yearly electrical safety inspection is expected to cover them, so appliance testing there is how compliance is evidenced rather than an optional extra. Appliances the tenant brings are not the landlord's to test. A licensable shared house usually has a licence condition that asks for the records, and that condition is the practical deadline in England and Wales.
How often for pat testing in a school or a hotel
Both are low risk environments with a high risk exception. A school's offices, classrooms and IT are at the office end of the scale, in years, while the design and technology workshop, the science labs, the kitchen and the caretaker's tools are industrial and belong in months. A hotel's back of house, kitchen and laundry are industrial; the bedrooms are low risk except for the items guests handle, kettles, hairdryers, irons and lamps, which are public use equipment and are inspected far more often than the interval for an office item, because nobody checks them before use. In both cases the useful step is to split the register by area rather than run one interval for the whole site, which is also the change that reduces the bill.
Questions people ask about pat testing intervals
Is annual PAT testing a legal requirement?
No. Annual testing is a convention that grew out of insurers and audit schemes asking for something simple, and for many items it is both too often and not often enough: too often for a stationary monitor, not often enough for a site tool. What an inspector or an insurer actually asks for is the decision about intervals with its reasoning, and the register showing the programme was followed. Annual testing for everything is defensible if you can explain it and expensive if you cannot.
Who can carry out the inspections?
The user check is everybody's, and it needs nothing but instruction on what to look for. The formal visual inspection needs somebody trained to know what they are looking at, and that can be a member of staff after a short course. The combined inspection and test needs somebody competent with the instrument and able to interpret the readings, which is where a contractor or a properly trained employee comes in. The regulations do not require a qualified electrician for portable appliance work, though many businesses use one.
Does a failed item have to be thrown away?
No, but it has to be taken out of service until it is repaired or scrapped, and the decision recorded either way. The three normal outcomes are repair and retest, which is worth it for anything substantial, replacement of a lead or a plug, which is the commonest fix and is cheap, and disposal. What is not acceptable is a failed item left in the cupboard with a red sticker, because the next person to need it will use it. A physical quarantine and a register entry are the two things that stop that happening.