Risks associated with the electrical installations and live equipment

Safety Instructions (IS)

  • IS 23

    Criteria and Standard Test Methods for the Selection of Electric Cables and Wires with Respect to Fire Safety and Radiation Resistance (2005)

    This instruction is based on the latest standards and recommendations to ensure a very high level of safety against hazards associated with smoke, toxicity and corrosivity from burning plastics. It summarizes the required properties for the different materials and cable types and is applicable to all types of cables and wires and other insulated parts to be used in CERN installations.

  • IS 24

    Regulations applicable to electrical installations (1990)

    Reference is made to publications on electrical installations.

  • IS 48

    Fire prevention for cables, cable trays and conduits (2001)

    This Safety Instruction defines rules and other preventive measures for cable fires. It lists the most common fire risks for cables and conduits. Mandatory precautions are specifically aimed at preventing cable fires in physics experiments where confined spaces, higher vicinity risks and lack of effective electrical protections add up to an increased risk of ignition.

  • IS 5

    Emergency stops (2001)

    Description of the two types of emergency stops (general and local emergency stops), the definition of the buildings or areas to be equipped, and effects due to these emergency stops on power supplies or accelerators. Exceptions and rules for safety equipment.

Safety Codes

  • C 1

    Electrical Safety Code (1990)

    The aim of this code (based on the most recent IEC or CENELEC standards) is to establish regulations for the construction, installation and use of electrical equipment which guarantee the protection of personnel and property, and applies to all persons under the Director-General's authority, including contractors and experimental groups, and to all electrical equipment and installations on all sites. Personnel qualifications, choice of equipment and inspections are some of the subjects dealt with.

Safety Guidelines

  • SG EL-0-0-1

    Installation of Safety lighting

    This Safety Guideline is intended to set out advice relating to the design, installation and maintenance of Safety lighting installations in buildings (or institutions) not receiving public.

Safety procedures

  • CERN templates to be obligatorily used for electrical works and/or non-electrical works in the vicinity of electrical equipment

    Work Permit (Electrical Safety)

    General and non-LHC

    EDMS N. 2170622


    EDMS N. 2170623


    Note: These forms are normally printed in carbonless paper with 4 copies (including the main one) and following a specific color code. Please contact EN-EL Secretariat or EN-ACE Secretariat for more information.