Definitions
Electrical Equipment: Any item used for such purposes as generation, conversion, transmission, distribution or utilisation of electrical energy, such as machines transformers. apparatus, measuring instruments, protective devices, equipment for wiring systems and appliances.
Electrical Installation: An assembly of associated electrical equipment, to fulfil a specific purpose or purposes and having co-ordinated characteristics.
Accessory: A device, other than current-using equipment, associated with such equipment or with the wiring of an installation.
Ambient Temperature: The temperature of the air or other medium where the equipment is to be used.
Appliance: Any device that utilises electricity for a particular purpose, excluding a luminaire or an independent motor.
Insulation: Non-conducting material enclosing, surrounding or supporting a live part.
Insulated conductor: A conductor having only basic protection against shock, consisting of a covering of insulation.
Cable: An insulated conductor with an outer protective covering against external influences.
External Influences: Any influence external to an installation which affects the design or safety of the installation.
Fixed Wiring or Cable: Wiring or cable mounted on a fixed support so that its position does not change.
Flexible Wiring or Cable: Wiring or cable that may be moved in normal service between its points of termination.
Conduit: A system of tubing intended to enclose cables and wires in order to protect them from mechanical damage, and to allow them to be drawn-in and withdrawn.
Cable Trunking System: A factory-made system for enclosing cables and insulated wires, normally of rectangular cross-section, one side of which can be removed, and forming part of the wiring system.
Neutral Conductor ( symbol N ): A conductor connected to the neutral point of a system for the purpose of transmitting electrical energy.
Phase Conductor: A conductor of an AC system, other than a neutral conductor, intended for the transmission of electrical energy ( also called “line conductor” ).
Cable Coupler: A means enabling the connection, at will, of two flexible cables. It consists of a connector and a plug.
Enclosure: A part providing an appropriate degree of protection of equipment against certain external influences and, a defined degree of protection against direct contact with live parts.
Building Void: A space within the structure or components of a building, which may be accessible at certain points.