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As shown in the illustration, what are the characteristics of the trouble relay contacts? Illustration EL-0058
A) two sets of normally closed contacts which open when the trouble relay coil is energized
B) two sets of normally closed contacts which close when the trouble relay coil is energized
C) two sets of normally open contacts which close when the trouble relay coil is energized
D) two sets of normally open contacts which open when the trouble relay coil is energized
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Illustration EL-0058

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