🔍 Key Concepts

• Locate the service factor (S.F.) rating on the motor nameplate shown in figure "A" • Understand that some nameplates list different ratings for different conditions (such as altitude or ambient temperature) • Remember that sea level usually corresponds to the standard or primary service factor value on the plate

💭 Think About

• On the nameplate, which number is explicitly labeled with something like S.F. near the horsepower, voltage, and amps ratings? • Does the nameplate show any alternate rating or note that changes when altitude increases (e.g., 3300 ft)? If so, which service factor applies before that change? • Among the choices given, which value looks like a typical motor service factor (rather than something that would represent temperature rise, efficiency, or power)?

✅ Before You Answer

• Confirm you are reading the field that is actually labeled S.F. or Service Factor on the nameplate, not efficiency or temperature rise • Make sure you are using the service factor value that corresponds to standard conditions (sea level, rated ambient temperature) • Verify that the value you pick is a dimensionless multiplier (a number close to 1) rather than a percentage or degree value