Three factors must be known to verify that the explosion-proof motor is appropriate for the dispenser installation and pump.

Three factors must be known to verify that the explosion-proof motor is appropriate for the dispenser installation and pump.

• A. RPM, Voltage, Temperature
• B. RPM, Horsepower, Voltage
• C. Horsepower, Current, Temperature
• D. RPM, Horsepower, Displacement

Answer: (B)

Matching the motor to the pump and the electrical system is the key idea here. The dispenser pump is designed to operate at a specific speed, so you need the motor’s revolutions per minute to align with that requirement. If the rpm is too high or too low, the pump won’t move the fluid correctly, can cause excessive wear, or reduce efficiency. The pump also needs a certain amount of power to overcome the system’s resistance and deliver the expected flow and pressure. That power is expressed as horsepower. A motor with sufficient horsepower provides the necessary torque and prevents the motor from overloading, overheating, or stalling during peak demand. Finally, the motor must be wired to the correct electrical supply. The voltage rating of the motor has to match the available voltage in the installation so the motor starts reliably and runs safely, especially in an explosion-proof setup where electrical safety is critical. Temperature and current play roles in overall safety and protection, but the essential trio you verify to ensure suitability is rpm, horsepower, and voltage. Displacement and other motor attributes aren’t part of matching an explosion-proof motor to this dispenser system.

Matching the motor to the pump and the electrical system is the key idea here. The dispenser pump is designed to operate at a specific speed, so you need the motor’s revolutions per minute to align with that requirement. If the rpm is too high or too low, the pump won’t move the fluid correctly, can cause excessive wear, or reduce efficiency.

The pump also needs a certain amount of power to overcome the system’s resistance and deliver the expected flow and pressure. That power is expressed as horsepower. A motor with sufficient horsepower provides the necessary torque and prevents the motor from overloading, overheating, or stalling during peak demand.

Finally, the motor must be wired to the correct electrical supply. The voltage rating of the motor has to match the available voltage in the installation so the motor starts reliably and runs safely, especially in an explosion-proof setup where electrical safety is critical.

Temperature and current play roles in overall safety and protection, but the essential trio you verify to ensure suitability is rpm, horsepower, and voltage. Displacement and other motor attributes aren’t part of matching an explosion-proof motor to this dispenser system.