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We can use normally closed pushbuttons instead of normally open pushbuttons when controlling lamps by step relay. O a. False. b. True When controlling a lamp by a step relay, the lamp is connected as follows: O a. one of its terminals is connected to phase line, the other terminal is connected to the pushbutton. O b. one of its terminals is connected to a point of the relay contacts, the other terminal is connected to neutral. c. one of its terminals is connected to the coil of the relay, the other terminal is connected to phase line. O d. one of its terminals is connected to the pushbutton, the other terminal is connected to neutral. The ELCB contacts open when they directly affected by: a. search coil O b. phase coil c. neutral coil d. trip coil