As shown in the illustration, what are the characteristics of the trouble relay contacts? Illustration EL-0058

Correct Answer: Option A — two sets of normally closed contacts which open when the trouble relay coil is energized

Trouble relay contacts in marine alarm systems utilize normally closed contacts configured to open when the coil energizes, breaking the supervisory circuit to actuate fault indicators. Under IEEE 45 and 46 CFR Subchapter J, this fail-safe arrangement ensures loss of control power immediately triggers an alarm.