As shown in figure "A" of the illustration,...

🔍 Key Concepts

• Relationship between the common equipment grounding conductor and the generator/transformer source windings in a 3‑phase, 3‑wire system • Difference between a solidly grounded system (neutral bonded to hull) and an ungrounded/insulated system • Typical practice on merchant vessel shipboard distribution systems (3‑phase, 3‑wire vs 4‑wire)

💭 Think About

• Look closely at figure A: is any point of the three‑phase source actually connected to hull ground or to the common equipment grounding conductor? • Compare what you see in figure A with figure B: which one shows the neutral or a winding point bonded to hull, and which one leaves the source isolated from hull? • Think about standard shipboard power: do most merchant vessels use a solidly grounded neutral, or an ungrounded/insulated system with insulation monitoring?

✅ Before You Answer

• Verify whether the neutral or any phase of the source in figure A is shown bonded to hull ground. • Confirm if the common equipment grounding conductor in figure A only ties equipment frames to hull, or also connects back into the source windings/neutral. • Decide which description (solidly grounded vs insulated from source) matches figure A, then match that with what is most common vs least common on merchant vessels.

As shown in figure "A" of the illustration, with respect to the common equipment grounding conductor, what statement is true? Illustration EL-0125

The common equipment grounding conductor is solidly grounded at the source and this is the most common arrangement onboard merchant vessels.

The common equipment grounding conductor is solidly grounded at the source and this is the least common arrangement onboard merchant vessels.

The common equipment grounding conductor is insulated from the source and this is the least common arrangement onboard merchant vessels.

The common equipment grounding conductor is insulated from the source and this is the most common arrangement onboard merchant vessels.

🔍 Key Concepts

💭 Think About

✅ Before You Answer