Fractional-Horsepower Motors
There are many types of motors on the market today that the electrician is required to install, maintain, repair, or replace. Some of these motors are very small and are classified as fractional-horsepower (FHP) motors. These motors are under 1 horsepower. The vast majority of motors in use today will be fractional horsepower motors.
Power Requirements
Motors are designed to operate on either AC, DC, or on AC or DC (universal motors). Voltage requirements can be as low as 1.5 volts for FHP motors and as high as 6600 volts for multiple-horsepower motors. Alternating current motors are single phase or polyphase.
The standard frequency for AC motors in this country is 60 hertz or 60 cycles per second. Other ...
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