BS 7909:2011

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Management of an event and supply of
   equipment for temporary electrical systems
5 Small/simple events and activities requiring
   up to 6 kVA
6 Large/complex events and activities requiring
   in excess of 6 kVA
7 Design and instructions for temporary electrical
   systems
8 Work on site
9 Inspection and testing
10 Operational procedures
11 Additional considerations
Annexes
Annex A (normative) - Construction of distribution
        equipment or switchgear for temporary
        systems
Annex B (informative) - Distribution equipment functionality
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) - Supplies provided for temporary
        distributions at venues
Annex G (normative) - Inspection, testing and certification
Annex H (informative) - Multi-pin connectors used for
        lighting applications
Bibliography

Provides recommendations for the management, design, setting-up and operation of temporary electrical systems using low voltage a.c. electricity, for the entertainment and similar or related industries.

This British Standard gives recommendations for the management, design, setting-up and operation of temporary electrical systems using low voltage a.c. electricity, for the entertainment and similar or related industries. Mobile and transportable units with electrical installations that are used in these industries are also covered.

This British Standard gives recommendations for the provision of a safe and suitable temporary electrical system for an event and the duties and work to implement this.

NOTE1 Each aspect of the work could be under the control of a different person responsible.

This British Standard gives guidance on matters of common interest to producers, production companies, event organizers and managers, freelance people, facilities and services hire companies, equipment hire companies, equipment manufacturers, electrical consultants, electrical installation contractors, distributors, suppliers of electricity, venues, local authorities and those responsible for safety.

The systems covered by this British Standard operate at low voltage as defined in BS7671:2008+A1:2011 and supply equipment normally operating at 230V a.c. or 400V a.c. 50Hz. Electricity at low voltage can be taken from an existing installed electrical system, the public supply, privately owned supplies or from mobile or portable generators. Direct current supplies are outside the scope of this British Standard.

NOTE2 It is expected that all electrical equipment, switchgear units, distribution units and cables used for work covered by this British Standard are manufactured to the appropriate product standards, and that the temporary electrical systems and their use are designed, set-up, supervised, operated and removed by suitably competent persons. It is also expected that responsibility for such temporary electrical systems is taken by a suitably competent person referred to as the person responsible.

NOTE3 All equipment forming the temporary electrical system is expected to be delivered to site as pre-assembled units that have been tested and are known to be safe and suitable for use. This does not preclude the manufacture on site of simple units that might be necessary; though this is the exception and not the rule.

NOTE4 In many situations temporary electrical distributions are intimately associated with mobile and transportable units. In such cases, see BS7671:2008+A1:2011, Section 717, for further information.

NOTE5 This British Standard may be applied to temporary electrical distributions at exhibitions and fairgrounds; see BS7671:2008+A1:2011, Sections 711 and 740, respectively for specific information for these activities. Specialized documents related to exhibitions are published by the Association of Event Venues [1].

NOTE6 Specialized documents related to theatres and places of entertainment are published by the Association of British Theatre Technicians [2].

NOTE7 This British Standard does not offer guidance for hazardous locations where expert advice needs to be sought.