In accordance with 46 CFR, Subchapter J...

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Question 1 of 205eccefa4bacbc34ba4d48571

In accordance with 46 CFR, Subchapter J (Electrical Engineering), a motor fitted with a heater to prevent condensation within the motor when the motor is idle must have a separate source of power and means of disconnect from the motor itself. Additionally a sign is required to warn the operator to open both devices before servicing. Where would you expect to find the heater disconnect device?

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🔍 Key Concepts

• 46 CFR Subchapter J requirements for space heaters/anti-condensation heaters in motors • Relationship between the motor power circuit and the heater power circuit • Location and purpose of disconnecting means and warning signage for servicing

💭 Think About

• Think about where a technician would logically stand when preparing to lock out/tag out a motor and its heater before maintenance. • Consider why the regulation requires a separate source of power and disconnect for the heater—how does this affect where it should be located? • Ask yourself which location would most clearly match the intent of the warning sign: “open both devices before servicing.”

✅ Before You Answer

• Verify whether Subchapter J expects both disconnects to be readily accessible together for safe servicing. • Check if there is any indication that the heater disconnect must be local to the motor versus local to the main motor disconnect. • Confirm that choice D (“no specific requirements”) conflicts with the description given in the question itself, which already states specific requirements.

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