What is the difference between BS7909 and PAT testing?

PAT testing covers individual portable appliances, while BS7909 addresses the design, installation, and verification of temporary electrical systems as a whole. BS7909 includes power distribution plans, load calculations, circuit protection, and earthing arrangements for entire event installations. Both are complementary and often required together.

Who needs BS7909 compliance?

Any company providing temporary electrical installations at events, festivals, exhibitions, or outdoor venues in the UK needs BS7909 compliance. This includes lighting, sound, staging, and power distribution companies. Local authorities and venue operators increasingly require BS7909 documentation before granting event licences.

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BS7909 Compliance

Planned: BS7909 compliance for temporary electrical systems at events. Power distribution plans, testing schedules, and load calculations.

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Power distribution plans

Load calculations

Testing schedules & records

Compliance certificates

Complete BS7909 Management

Planned features for designing, documenting, and certifying temporary electrical installations

Power Distribution Plans

Create detailed power distribution diagrams showing supply routes, distribution boards, and final circuits.

Testing Schedules

Automated schedules for initial verification, periodic inspection, and pre-event testing requirements.

Compliance Certificates

Generate BS7909-compliant electrical installation certificates and completion documents.

Load Calculations

Automatic load balancing calculations across phases with diversity factors and maximum demand.

Safety Documentation

Comprehensive safety documentation including risk assessments and method statements for electrical works.

Circuit Diagrams

Visual circuit diagrams with standard electrical symbols, cable routes, and protection devices.

RCD Testing Records

Record and track RCD trip times, test dates, and compliance status for every protective device.

Earth Loop Impedance

Log earth fault loop impedance readings and verify they meet maximum permitted values.

Inspection Checklists

Pre-configured checklists aligned with BS7909 requirements for systematic site inspections.