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The abbreviations NO (normally open) and NC (normally closed) represent the electrical state of switch contacts when:
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The abbreviations NO (normally open) and NC (normally closed) represent the electrical state of switch contacts when:

User David Van Dugteren
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NO (Normally open) means current does not flow (contacts are not moved to action)
NC (normally closed) means the circuit has been closed and current can flow
User Eclaude
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