Question 56Electricity & Electronics - 1st Asst/Chief

The correct answer is B) The common equipment grounding conductor is insulated from the source and this is the most common arrangement onboard merchant vessels. The reasoning behind this is that the National Electrical Code (NEC) and other industry standards typically require the equipment grounding conductor to be insulated from the source in order to maintain the integrity of the grounding system and prevent potential faults or issues. This insulated grounding conductor configuration is the most common arrangement found on merchant vessels, as it provides a reliable and safe method of grounding electrical equipment. The other options are incorrect because A) and D) describe a solidly-grounded common equipment grounding conductor, which is less common, and C) states that the insulated configuration is the least common, which is the opposite of the correct answer.