Before any power reaches your stand, three things must be in place: portable appliance testing (PAT) certificates for every piece of kit you bring, compliance with the Electricity at Work Regulations 1989 and, for larger builds, BS 7909 and a connection signed off by the venue’s own nominated electrical contractor. Miss any one of these and you risk arriving on build day with a stand that simply cannot be switched on.
TL;DR:
- Most connection refusals result from late paperwork submission or untested equipment rather than wiring faults.
- The exhibitor must carry current PAT certificates for all portable devices, and a failure to present them can lead to non-connection.
- Large or complex stands require a nominated senior responsible person and formal BS 7909 sign-off for the power system’s safety.
- Using the correct socket types, properly testing RCDs, and following cable routing guidelines are essential to prevent safety incidents.
- Final connection and energizing must be done by the venue’s official contractor, with inspection and certification completed before switch-on.
Table of Contents
- Quick compliance checklist to complete before build day
- Who is responsible: organiser, exhibitor, contractor and the SPR
- Technical rules for stands: PAT, sockets, RCDs and cable routing
- Ordering power and working with the venue’s official contractor
- Temporary installations and BS 7909: classification, generators and earthing
- Inspection, testing, certification and handover: what to expect on site
- Common pitfalls and red flags that cause refusals or unsafe installations
- How A3m helps you get power sign-off right first time
- Why the rulebook keeps tripping people up
- Sources
- FAQ
Quick compliance checklist to complete before build day
Most refused connections trace back to paperwork left too late, not faulty wiring. Sorting the following before you arrive saves you a stressful morning arguing with a venue electrician who has every right to say no.
- Order stand power from the venue and submit your grid plan by the stated deadline, not the week before.
- Get every portable electrical item PAT tested and labelled, and bring the certificates with you.
- Decide who will act as the Senior Person Responsible (SPR) if your system counts as large or complex under BS 7909.
- Book a contractor with genuine experience of temporary event power, not just general commercial wiring.
- Plan cable routes, confirm RCD protection, and check which socket types the venue actually supplies.
Pro Tip: Ask the venue’s technical team which socket types they provide before you specify your stand’s electrical layout. Assuming standard 13 A sockets when the hall only offers industrial BS EN 60309 outlets is one of the most common last-minute headaches organisers face.
Who is responsible: organiser, exhibitor, contractor and the SPR
Electrical safety at a UK exhibition is never one party’s job alone. Under the Electricity at Work Regulations 1989 and the Provision and Use of Work Equipment Regulations, dutyholders must ensure electrical systems and equipment are safe for their intended use, and that duty gets split by role rather than resting on a single company.
- The exhibitor is responsible for PAT testing and choosing appropriately rated equipment for their stand.
- The organiser and venue provide the electrical supply, approve connections, and oversee the nominated contractor’s work.
- The SPR, required under BS 7909, manages the temporary power system’s safety from design through to disconnection.
A stand drawing below a certain power threshold usually counts as small and simple, with lighter paperwork. Anything larger, or anything feeding multiple sub-distribution points, tips into “large or complex” territory, where the SPR’s formal sign-off becomes essential rather than optional.
Technical rules for stands: PAT, sockets, RCDs and cable routing
The technical detail is where most preventable incidents happen, and where venues are least willing to compromise. UCL’s PAT safety standard confirms that anyone bringing portable equipment onto a stand is strictly responsible for making sure it has been tested, and equipment without a current label can be refused connection outright.
- PAT records. Keep test certificates on hand, not just filed back at the office. A missing certificate on the day is treated the same as a failed test.
- Socket types. Domestic 13 A BS 1363 sockets suit small lighting and laptops; larger loads or shared power distribution typically need industrial BS EN 60309 plugs, rated by colour for voltage.
- RCD protection. Circuits should carry 30 mA RCD protection as standard, tested regularly rather than assumed safe from installation day. A tripped RCD is a warning sign of a fault, not something to simply reset and ignore.
- Cable routing. HSE’s GS50 guidance sets out ramping over walkways, catenary suspension where cables must cross open space, a minimum clearance of 5.8 metres where vehicles pass beneath, and a firm rule against buried or hidden joints.
- Power limits. Respect the circuit rating the venue allocates. Daisy-chaining extension leads or adaptors to squeeze more load from one socket is a common cause of overheating and on-site trips.
Exhibition venue rules reinforce this at a structural level too. Guidance from the Exhibition Venues Association specifies separate mains or approved block mains per stand, minimum sub-main cable sizes, and clearly located isolation points, all checked before any board is energised.
Ordering power and working with the venue’s official contractor
Electrics are never bundled in with a stand booking. Venue technical manuals are consistent on this point: exhibitors must actively order power, submit a grid plan showing exact positions, and use the venue’s appointed contractor for the final connection, as confirmed in the Dentistry Show London technical manual.
- Submit order forms and grid plans by the stated deadline. Late orders often carry a surcharge, and some venues simply refuse them.
- You can pre-fabricate wiring within your stand build, but the final connection to the venue’s supply must go through the official contractor, not your own electrician.
- The venue’s contractor has the right to inspect your installation and refuse to energise it until faults are corrected.
- A 24-hour supply is usually available at extra cost, and any changes requested on site tend to attract premium call-out charges.
Temporary installations and BS 7909: classification, generators and earthing
Confusion between the general wiring standard BS 7671 and the event-specific BS 7909 causes more safety gaps than almost any other misunderstanding on the exhibition floor. BS 7909 exists specifically for temporary, plug-and-play power systems, and it is the standard your contractor should be working to, not the domestic wiring rules built for permanent installations.
- Systems below roughly 6 kVA are typically classed small and simple, needing lighter documentation.
- Larger or multi-source systems are large or complex, requiring formal design records and a completion certificate before use.
- Generator earthing must never rely on the building’s own earthing arrangement. GS50 guidance stresses proper bonding to structural elements and testing generator outputs before they carry any load.
- Contractors working to BS 7909 should hold recognised training such as NAPIT’s NA7909 course, alongside scheme membership and adequate insurance, as the Temporary Electrical Installations Scheme sets out.
Pro Tip: If your show involves imported equipment on a shared stand with an overseas exhibitor, ask early whether their kit has been tested to UK standards. A generator or distribution board built for a different country’s supply frequently needs an isolating transformer before it can go anywhere near a UK circuit.
Inspection, testing, certification and handover: what to expect on site
Energising a stand is never automatic. The venue’s electrical contractor works through a fixed sequence before switching anything on, and skipping steps only causes delays later.
- The contractor checks your request-for-connection form against the approved grid plan.
- Distribution boards, cabling and equipment are inspected against current test certificates.
- Once satisfied, the contractor issues a completion certificate confirming the installation is safe to energise.
- Records are handed back to you for retention, covering insurance claims, local authority licensing checks and future show bookings.
A failed inspection means a retest, and retests are rarely free or fast. Keeping your paperwork complete and current is the cheapest insurance you will buy all show.
Common pitfalls and red flags that cause refusals or unsafe installations
Most on-site electrical problems are avoidable, and they tend to repeat across shows because the same shortcuts get taken under time pressure.
- Ordering power late, or submitting a grid plan that does not match the actual stand layout.
- Turning up with unlabelled or untested portable equipment.
- Daisy-chaining leads, stacking multiple 4-way adaptors on one socket, or running extension leads well beyond sensible lengths.
- Assuming imported equipment is safe on a UK supply without checking plugs, adaptors or isolating transformers.
- Hiring a general electrician instead of a contractor with genuine event-specific competence and adequate insurance cover, as flagged in HSE’s guidance on event electrical safety.
How A3m helps you get power sign-off right first time
A workable checklist for any UK exhibition comes down to five items: PAT certificates in hand, power ordered against a submitted grid plan, insurance confirmed, an SPR appointed where the system warrants one, and full handover documentation kept safe afterwards.
Where A3m fits into this is at the build stage. In-house manufacturing means lighting, power runs and fixtures for your bespoke exhibition stand are pre-planned with safe cable routing and clean sockets access in mind, rather than improvised on site. If you brief your exhibition stand supplier early with your venue’s technical manual and grid plan deadline, that pre-fabrication work can be shaped around what the official contractor will actually sign off, which tends to smooth the final connection rather than complicate it.
For teams juggling exhibition stand lighting choices alongside power planning, bringing that conversation in at design stage, not after the stand is built, is what actually saves time on the show floor. Get in touch with A3m before your build date to talk through your stand design and electrical layout together.
Why the rulebook keeps tripping people up
The exhibition electrics problem isn’t ignorance of the rules. It’s assuming the rules are the same everywhere. Every venue layers its own technical manual on top of HSE guidance and BS 7909, and those manuals genuinely differ on deadlines, socket provision and surcharge policy. A contractor who did last month’s show perfectly can still get caught out this month by a venue with a stricter grid plan deadline.
The other pattern worth naming: teams treat PAT testing as a formality rather than a gate. It is not a box to tick after the stand is built. It is the single most common reason connections get refused on the morning of build day, according to UCL’s own safety standard, and it is entirely within your control weeks before the show opens.
If there’s one habit worth changing across the industry, it’s treating the SPR appointment and BS 7909 classification as afterthoughts rather than the first two decisions you make. Get those right, and most of the paperwork below them falls into place on its own.
— Steve
Sources
- Portable appliance testing (PAT) safety standard — UCL (2024)
- Electrical safety standards — HSE
- Temporary Electrical Installations Scheme — NAPIT
FAQ
Do I need PAT testing for every item on my exhibition stand?
Yes. Any portable electrical equipment brought onto a stand needs a current, labelled PAT certificate, and the person or company bringing it carries strict responsibility for that testing. Venues can and do refuse connection for untested items.
What is a Senior Person Responsible (SPR) at an exhibition?
The SPR is the individual named under BS 7909 to manage the safety of a temporary event power system from design through to disconnection. Appointment becomes essential once a system moves beyond small, simple installations.
Can I connect my own electrician to the venue’s power supply?
No. Venue technical manuals consistently require the final connection to be made by the venue’s own nominated electrical contractor, as shown in manuals like the Dentistry Show London technical manual. You can pre-fabricate wiring within your stand, but the live connection is theirs to make and sign off.
What socket types are used at UK exhibitions?
Standard 13 A BS 1363 sockets cover light loads such as lighting and laptops, while higher loads or shared distribution typically run through industrial BS EN 60309 plugs. Confirm which type your venue actually supplies before finalising your stand’s electrical layout.
What happens if my stand fails the electrical inspection?
The venue’s contractor will not energise the installation until faults are corrected and a completion certificate can be issued. Repeated failures usually mean additional retest charges and delays, so getting cabling, RCD protection and certificates right the first time avoids both cost and stress.