🔍 Key Concepts

• High voltage vs. low voltage definitions in marine electrical standards (such as IEC/IMO guidance) • Typical shipboard distribution voltages (e.g., 440 V systems vs. kV-level systems) • Why special procedures and extra insulation/clearances are required above a certain voltage

💭 Think About

• Look at the answer choices and think: at what approximate voltage do shipboard electrical systems start being treated as "high voltage" with special rules and training? • Consider common shipboard distribution levels: which of the options is closest to the boundary between standard low-voltage systems and those requiring high-voltage safety practices? • Ask yourself: below this threshold, would typical ship service switchboards and motors (440–690 V range) still be considered low voltage?

✅ Before You Answer

• Check which of these values is commonly used as the regulatory cutoff between low voltage and high voltage on ships. • Confirm that typical ship service systems (around 440–690 V) fall below the threshold you choose. • Make sure the option you pick is the lowest value that is still clearly in the high-voltage "kV" range used for special HV practices.