Question 43Electricity & Electronics - QMED

The correct answer is A) start/stop push button station. According to US Coast Guard regulations, a start/stop push button station is not considered a suitable primary means of electrical isolation. This is because a push button station does not provide a positive, visible break in the electrical circuit, which is a key requirement for a primary means of isolation. In contrast, options B) non-fused disconnect switch, C) circuit breaker, and D) fused disconnect switch all provide a clear, positive break in the circuit and are approved as primary means of electrical isolation on US Coast Guard-inspected vessels.