Which motor type is described as Open Drip Proof?

• A. Open Drip Proof (ODP)
• B. Totally Enclosed Fan-Cooled (TEFC)
• C. Explosion-Proof
• D. Hermetic

Answer: (A)

Open Drip Proof refers to a motor enclosure that is not fully sealed but is designed to vent and drain liquids while allowing cooling air to circulate. The openings let heat escape and enable droplets or minor sprays to drip away from the windings, rather than accumulating inside. This design suits environments with some moisture or dust but not exposure to heavy sprays or explosions. It contrasts with a totally enclosed fan-cooled motor, which keeps the interior protected with a sealed housing and relies on an external fan for cooling, and with explosion-proof or hermetic designs, which are built for hazardous atmospheres or complete sealing. So the described motor is the Open Drip Proof type because it features openings that vent and drain while providing cooling.