Which motor is defined as having a protective enclosure to limit direct access to live metal or rotating parts?

Which motor is defined as having a protective enclosure to limit direct access to live metal or rotating parts?

• A. Guarded Motor
• B. Open Motor
• C. Explosionproof Motor
• D. Totally Enclosed Motor

Answer: (A)

Limiting direct access to live metal or rotating parts is achieved by a guarding feature—the motor enclosure that provides a barrier between the moving part and the operator. A guarded motor is defined by this protective enclosure, which prevents accidental contact with live components or rotating elements. An open motor has no enclosure, leaving live parts exposed. An explosionproof motor is designed to contain any ignition within its rugged enclosure in hazardous locations, not primarily to restrict access to moving parts. A totally enclosed motor surrounds the internal components to protect from the environment, but it isn’t defined by having a guard that specifically limits access to live or moving parts. So the guarded motor best matches the description.

Limiting direct access to live metal or rotating parts is achieved by a guarding feature—the motor enclosure that provides a barrier between the moving part and the operator. A guarded motor is defined by this protective enclosure, which prevents accidental contact with live components or rotating elements. An open motor has no enclosure, leaving live parts exposed. An explosionproof motor is designed to contain any ignition within its rugged enclosure in hazardous locations, not primarily to restrict access to moving parts. A totally enclosed motor surrounds the internal components to protect from the environment, but it isn’t defined by having a guard that specifically limits access to live or moving parts. So the guarded motor best matches the description.