WV Electrical Contractor Practice Questions - West Virginia Electrical Contractor Examination Exam

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NEC 2020 820.93 requires the outer conductive shield of a coaxial cable entering a building to be grounded as close as practicable to the point of entrance. What is the primary purpose of that shield grounding?

To increase the CATV signal strength inside the dwelling To limit voltage on the shield that could be impressed on the cable from lightning or contact with power conductors To serve as the building grounding-electrode conductor for the electrical service To replace the intersystem bonding termination required by 250.94

Correct Answer:

To limit voltage on the shield that could be impressed on the cable from lightning or contact with power conductors

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