control boards involving an assembly of switches, wires and instruments. ... Chief reliance should be placed on adequate ventilation, supplemented by flameproof enclosure of electrical equipment. ... The transfer of volatile fluids, such as petrol, from storage tanks to road vehicles will cause electrification of the latter which may be overcome by ... This can be arranged by connecting between metal casings and the neutral or earthed conductor of the supply system (see diagram).
|Title||:||Industrial Safety Survey|