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Page 385

| INDEX |

| A. |

| AC (see Alternating current) |

| AC Circuit, 8 |

| Additive polarity, 70, 71, 75, 77, 80, 85 |

| Air, 29, 30, 31-34, 53, 64, 65, 132 |

| ionized, 135 |

| Air blast, 32, 33, 53 |

| Air break switch, 182-86 |

| Air circuit breaker, 132, 142, 146 |

| Air cooled transformer, 29, 30, 53 |

| Air core reactor, 306-7 |

| Air Gap, 38, 151, 219, 221, 222, 225 |

| Alkaline cell, 288, 289, 292-97 (see also Battery, storage) |

| Alternating current, 3, 8, 9, 11, 12, 13, 17, 103 |

| Alternation, 8, 9, 17 |

| Alternator, 9 |

| Aluminum, 26 |

| Ambient, 57, 116 |

| American Standards Association, 71 |

| Ammeter, 57, 96, 108, 115, 328-33 (see also Instruments) |

| indicating, 57, 96 |

| maximum indicating, 57 |

| permanent magnet coil, 328-33 |

| recording, 57 |

| Ampere, 5, 15, 53, 97-99, 103 |

| Ampere turns, 7, 15, 16 |

| Amplitude, 8, 9 |

| Angular displacement, Phase, 74, 82, 83 |

| Annunciator system, 103 |

| Arc, electric, 132-35, 142, 144-46, 165, 220, 225 |

| Arc chute, 133, 142 |

| Arc control, 142 |

| Arcing time, fuse, 200 |

| Arcing tips, 139 |

| Arc quencher, 142, 144 |

| maintenance, 165 |

| Arrester, 38, 49-50, 52-53, 59 (see also Lightning arrester) |

| Asbestos, 26 |

| Askarels, 34, 53, 62, 121 |

| Autotransformer, 38, 53, 89-92, 100-104 |

| annunciator, 103 |

| bell ringing, 103 |

| ignition coil, 104 |

| indicating lamps, 103 |

| lamp, 103 |

| motor starting, 102-3 |

| welder, 103 |

| X-ray, 103 |

| Auxiliary equipment, 56 |

| B |

| Ballast, 101 |

| Banking of transformers, 19, 84 |

| Barrier, bushing, 48 |

| safety, 43 |

| transformer oil, 49 |

| Basic insulation level, 228-33 |

| Battery, storage, 104, 159, 179 |

| alkaline, 288-89, 292-93, 303 |

| cells, 294-95 |

| cell temperature, 298 |

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