Definitions
Portable Equipment: Equipment that is designed to be moved while in operation or moved easily from one place to another while connected to the supply.
Hand-Held Equipment: Portable equipment intended to be held in the hand during normal use, in which the motor, if any, forms an integral part of the equipment.
Stationary Equipment: Fixed equipment or equipment not provided with a carrying handle and having such a mass that it cannot easily be moved.
Example: The value of this mass is greater than 18Kg in standards relating to household appliances.
Fixed Equipment: Equipment fastened to a support or otherwise secured at a specific location.
Supply Point: A point at which electrical energy is delivered.
Origin of a Circuit: The point at which electrical energy is delivered to a circuit.
Radial Final Circuit: A final circuit that serves two or more points including socket-outlets.
Ring Final Circuit: A final circuit arranged in the form of a ring connected to a single point of supply.
Spur: A branch from a ring final circuit.
Isolating Transformer: A transformer, the input winding of which is electrically separated from the output winding by insulation at least equivalent to double insulation or reinforced insulation.
SELV: A voltage not exceeding 50 V a.c. or 120 V d.c. between conductors at any point of a circuit which is separated form circuits with higher voltages and from earth by insulation at least equivalent to that for Class II or which has equivalent protective means.
Sockets Outlets and Plugtops
Figure 1 illustrates a 1 gang 13 A socket outlet. It is the type used in domestic premises, offices etc.
Figure 6 illustrates a 16 A two pin side earth socket. It is used in some continental countries and may be encountered in some old installations in Ireland.
