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ammeter ampere-hour amperes anode applied armature battery brake brush bulb cables capacitance capacitor carbon cathode cell cent charge circuit circuit-breakers coil colour commutator conductor connected connexion contactor contacts copper core Current Rating diagram ductor earth efficiency electrical electrodes electrolyte equipment evaporator fault field flameproof flux frequency full-load fuse gear grid heat heaters impedance induction induction motor installation insulation lamp length light load machine magnetic maximum ment metal meter method motor nected nexions normal ohms operating output overhead lines overload phase plates poles position power factor pressure protection pumps reactance rectifier refrigerant Regulations relay resistance resistor rotor secondary short-circuit shown in Fig shunt single-phase slip-ring solenoid speed starter stator supply surface switch switchgear synchronous TABLE temperature three-phase tion torque trans transformer tube typical usually valve vapour voltage voltmeter volts wattmeters winding wire