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starting circuit. <br /> C. The breaker shall include 3 normally open and 3 normally closed auxiliary <br /> contacts. <br /> D. The breaker shall be a NEMA 4X. <br /> 17.2.06 AUTOMATIC START AND STOP CONTROLS <br /> A. General Description. Automatic starting and stopping controls shall be <br /> furnished to start the engine automatically when the normal electric power <br /> fails or falls below specific limits and to stop the engine automatically after <br /> the normal power supply resumes. The signal for starting or stopping the <br /> engine shall be from an external auxiliary contact. The controls shall be <br /> capable of operating at 50% of normal DC system supplied voltage. <br /> B. Engine Cranking Control. Crank control and time delay relays shall provide <br /> at least one cranking period. If only one cranking period is provided, its <br /> duration shall be at least 15 seconds. If more than one cranking attempt is <br /> provided, each cranking period shall be for at least 7 seconds, and the <br /> cranking attempts shall be separated by appropriate rest periods. A <br /> sensing device shall automatically disconnect the starting circuit when the <br /> engine has started. If the engine has not started at completion of the <br /> starting program, the overcranking signal shall so indicate. The engine <br /> starting controls shall be locked out and no further starting attempts shall <br /> take place until the overcranking device has been manually reset. <br /> C. Selector Switch. A selector switch shall be incorporated in the automatic <br /> engine start and stop controls. It shall include an "off' position that <br /> prevents manual or automatic starting of the engine, a "manual" or <br /> "handcrank" position that permits the engine to be started manually by the <br /> pushbutton on the control cabinet and run unloaded; an "automatic" <br /> position which readies the system for automatic start or stop on demand of <br /> the automatic load transfer switch or a programmed exerciser. <br /> D. Manual Test Operation. It shall be possible to start the engine manually <br /> and run it unloaded by a manual pushbutton on the control cabinet that <br /> causes the engine to start, run and stop through the automatic start and <br /> stop controls. <br /> 17.2.07 INSTRUMENTATION <br /> A. Instruments and Controls. The following engine and generator instruments <br /> and controls shall be furnished and installed: <br /> 1. A.C. ammeter <br /> 2. A.C. voltmeter <br /> 3. Governor speed adjusting control <br /> 4. Water temperature gauge <br /> 5. Oil Pressure gauge <br /> 6. Manual start/stop control <br /> 7. Voltmeter/ammeter phase selector switch <br />