| BS 7909:2008 Code of practice for temporary electrical systems for entertainment and
related purposes
Link to BSI Shop
The following is an outline of the contents of the
Standard:
1 Scope
2 Normative references
3 Terms and definitions
4 Management of an event and supply of equipment for temporary electrical
systems
4.1 Management of the event
4.2 Outlining the parameters of the event
4.3 Responsibility for the temporary electrical system(s)
4.4 Early planning
4.5 Provision of equipment
5 Small/simple events and activities requiring up to 6kVA
5.1 General
5.2 Person responsible
5.3 Planning the small/simple temporary electrical system
5.4 Risk assessments
5.5 Supplying and checking equipment
5.6 Setting-up a small/simple temporary electrical system
5.7 Changes to the system
5.8 Leaving the system unattended
5.9 Removing the system
5.10 Problems with the installed electrical system
6 Large/complex events and activities requiring in excess of 6 kVA
6.1 Responsibility
6.1.1 Person responsible
6.1.2 Allocation of responsibility
6.1.3 Principle responsibilities
6.1.3.1 System design
6.1.3.2 Site work
6.1.3.3 Testing and certification
6.1.3.4 Operation
6.1.3.5 Removal of equipment
6.2 Electrical supply
6.2.1 Supplies required
6.2.2 Electrical supplies from installed sources
6.3 Risk assessments
6.4 Equipment
6.4.1 General
6.4.2 Specialist equipment
6.4.3 Specific electrical requirements
6.5 Crew
7 Design and instructions for setting-up temporary electrical systems
7.1 Design
7.2 Electrical supplies
7.2.1 Source of supply
7.2.2 Generators as a source of supply
7.2.3 Responsibility for connection to a supply
7.3 Cables and connectors
7.3.1 General
7.3.2 Identification of conductors and single pole connectors
7.3.3 Cables
7.3.4 Connectors
7.3.4.1 General
7.3.4.2 Single pole connectors
7.3.4.3 Connections for tails
7.3.4.4 Connection to busbars
7.4 Earthing and bonding
7.4.1 General
7.4.2 Generator Earthing
7.4.2.1 General
7.4.2.2 Generator earthing required
7.4.2.3 Generator earthing not required
7.4.2.4 TN-C-S or PME supplies and mobile and transportable units
7.4.3 Interconnection of earthing systems
7.4.4 Protective bonding
7.5 Overcurrent protection for temporary systems
7.6 RCDs in temporary systems
7.7 Equipment forming the temporary electrical system
7.8 Machinery
7.9 Luminaires
7.10 Electronic equipment used for control and power-processing
7.11 Subsystems for associated services
7.12 Protection against unauthorised use
7.13 Safety systems
7.13.1 Communications systems
7.13.2 Supplies for safety services
7.13.3 Warning signs
7.14 Weather conditions
8 Work on site
8.1 General
8.2 Responsibilities
8.3 Design assessment
8.4 Equipment assessment
8.4.1 General
8.4.2 Test and identification before delivery
8.4.3 Inspection of equipment on site
8.5 Live working
8.6 Connection to power supplies
8.6.1 General
8.6.2 Verification of supplies
8.6.3 Connection using plugs and sockets
8.6.4 Connection using single pole connectors
8.6.5 Connection using open tails
8.6.6 Connection to supplies obtained from bus bars
8.7 Fundamental checks
8.7.1 Polarity check
8.7.2 Phase sequence
8.7.3 Earth fault loop impedance
8.7.4 RCDs
8.7.5 Neutral/Earth indication
8.7.6 Protective earthing and bonding arrangements
8.8 Protection against damage and interference
8.8.1 Cables
8.8.2 Switchgear, distribution units and other equipment
8.9 Safe working practice
8.9.1 Identification and isolation of circuits
8.9.2 Knowledge of site emergency procedures
8.9.3 Unattended system
8.9.4 Access covers
8.9.5 Faulty items
8.9.6 Safety lighting
8.9.7 Hand-held mains-powered equipment
8.9.8 Disabling RCDs
8.10 Communications
8.11 Weather conditions on site
8.12 Specialist sites
8.13 Signs and warning notices
9 Inspection and testing
9.1 General
9.2 Person responsible
9.3 Records, results and certificates
9.3.1 Initial verification
9.3.2 In-service inspection and testing
9.4 Test and identification of equipment before delivery
9.5 Electrical systems brought by facilities providers
9.6 Supply to facilities providers
9.7 Visual inspection
9.8 Tests
9.8.1 General
9.8.2 Equipment tests prior to arrival on site
9.8.3 System tests on site
9.8.4 RCD
9.9 Onsite assembly or modification
9.9.1 Units assembled on site
9.9.2 Equipment repaired or modified on site
10 Operational procedures
10.1 Competent person present
10.2 Regular inspection
10.3 Supervision of temporary systems for safety
10.4 Site security
10.5 Site emergency services or procedures
10.6 Non-load making and breaking connectors
10.7 RCD bypass
11 Additional considerations
11.1 Protection against lightning
11.2 Discharge of static electricity
Annex A (normative)
Construction of distribution equipment or switchgear for temporary systems
Annex B (informative)
Distribution equipment functionality
Intake Switch Units;
Control Centres; Final
Distribution Units;
Cable Splitter Units.
Annex C (normative)
Earthing arrangements and temporary systems
Annex D (informative)
Possible arrangements for temporary electrical systems
Annex E (informative)
Residual current devices (RCDs) – selection and use
Annex F (informative)
(informative)
Supplies provided for temporary distributions at venues
Annex G (normative)
Inspection, testing and certification
Annex H (informative)
Standard connections for a 19 pin quarter turn connector
Bibliography
Link to BSI Shop | 
