Extra-Low-Voltage Supplies

Abstract

Although the voltages are lower than the 240 V mains voltage, cables and wires carrying E.L.V. must have proper protective insulation to prevent possible leakage currents. Great care is also necessary to prevent short-circuits, since they may be the cause of fires. E.L.V. cables are not permitted to be drawn into the same conduit, duct or trunking partition together with cables supplying 240 V circuits, unless they are insulated for this higher voltage.