5 Dollar Traffic School Practice Exam

In a commercial building, the communication grounding system must ultimately be bonded to:

A separate isolated ground rod The building's structural steel only The main electrical service grounding electrode system A nearby water pipe without bonding to electrical

Correct Answer:

The main electrical service grounding electrode system

Explanation:

All grounding systems (electrical, communication, lightning) must be bonded together at the main electrical service grounding electrode system to prevent dangerous potential differences.

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