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Table 1 - Service Factors
The machines listed below are representative samples only. Select the group whose load characteristics closely match the machine being considered. |
Types of Prime Mover | |||||
AC Motors: Normal Torque (NEMA A-B), Squirrel Cage, Synchronous, Split Phase
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AC Motors: High Torque (NEMA C-D), High Slip, Repulsion, Induction, Single Phase, Slip Ring, Series Wound |
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| Intermittent Service: 3-5 Hrs/Day or Seasonal | Normal Service: 8-10 Hrs/Day | Continuous Service: 16-24 Hrs/Day | Intermittent Service: 3-5 Hrs/Day or Seasonal | Normal Service: 8-10 Hrs/Day | Continuous Service: 16-24 Hrs/Day | |
| Type of DriveN Machine | ||||||
Fans (up to 10 HP); Centrif ugal Pumps and Compressors; Conveyors (Light Duty) |
1.0 |
1.1 |
1.2 |
1.1 |
1.2 |
1.3 |
Agitators: Liquid; Revolving and Vibrating Screens; Fans (over 10 HP); Generators; Machine Tools: Lathes, Mils, etc.; Line Shafts; Positive Displacement Rotary Pumps; Woodworking Equipment: Saws, Drils, Lathes, etc. |
1.1 |
1.2 |
1.3 |
1.2 |
1.3 |
1.4 |
Brick Machinery; Agitators: Semi-Liquid; Presses, Punches, Shears; Pumps (Piston); Belt Conveyors: Ore, Coal, Sand, Aggregate; Compressors (Piston); Positive Displacement Blowers; Saw Mil Machinery; Textile Machinery |
1.2 |
1.3 |
1.4 |
1.4 |
1.5 |
1.6 |
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