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Constructional requirements of prefabricated equipment are covered separately by appropriate specifications, usually British Standards, CENELEC Standards and/or IEC Standards. Section 113 covers this point and further demands that the equipment complies with appropriate standards. 4 Relationship with statutory authorities As stated in Section 114, the rules in BS 7671 are not statutory requirements. However, they may be cited in a court of law in order to claim compliance with statutory requirements or indeed to claim noncompliance.

2 states that Chapter 13 of BS 7671 addresses the fundamental principles but does not give the detailed technical requirements. Therefore, it follows that Parts 3–7 give greater detail of the methods of achieving the fundamental principles laid down in Chapter 13. 3, the various parts of BS 7671 giving technical requirements intended to afford compliance with the fundamental principles are • Part 3: Assessment of general characteristics; • Part 4: Protection for safety; Scope, object and fundamental principles 21 • Part 5: Selection and erection; • Part 6: Inspection and testing; • Part 7: Special installations or locations.

See also BS 559 Specification for electric signs and high-voltage luminous-discharge-tube installations, and BS EN 50107 Signs and luminous-discharge-tube installations operated from a no-load voltage exceeding 1 k V at not exceeding 10 k V, as applicable. Applies to all installations where such substances are used. Under this legislation, local authorities are empowered to grant licences for premises where such substances are stored. Substances other than petroleum are included. Applies to all installations where such substances are used or such atmospheres exist.

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