Which code denotes the normal switch correspondence relay?

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Multiple Choice

Which code denotes the normal switch correspondence relay?

Explanation:
Relays are named with codes that reflect their function and state. The letters indicate Normal, switch-related function, and correspondence between the switch position and the route. The normal switch correspondence relay is the one that combines all three aspects: Normal, switch, and correspondence. That exact combination is Nwc, so it uniquely denotes the normal switch correspondence relay. The other options omit one or more of these elements, so they refer to different relays.

Relays are named with codes that reflect their function and state. The letters indicate Normal, switch-related function, and correspondence between the switch position and the route. The normal switch correspondence relay is the one that combines all three aspects: Normal, switch, and correspondence. That exact combination is Nwc, so it uniquely denotes the normal switch correspondence relay. The other options omit one or more of these elements, so they refer to different relays.

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