Read the passage: 'All electrical installations must conform to the National Electrical Code (NEC). The NEC is updated every three years to incorporate new safety findings. Inspectors verify compliance before a certificate of occupancy is issued.' What is the main purpose of the NEC according to this passage?
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A
To train electricians for the IBEW exam
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B
To ensure electrical safety through standardized codes
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C
To provide a schedule for electrical inspections
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D
To certify electrical contractors for licensing