Wiktor Wise
In the context of electricity, FLC stands for Full Load Current. It is the standard value given in tables for AC and DC motors in the UL 508A standard and the National Electrical Code (NEC). FLC is used to determine short-circuit protection, cable size, and the size of the main disconnecting device of a control panel. It is also used when sizing electrical systems and breaker and wire sizes for motors. FLA and FLC are often used interchangeably, but they are not always equal in value. FLA stands for Full Load Amperage and is the rated current of the motor, indicated on the motor nameplate.
| Characteristics | Values |
|---|---|
| Full form | Full Load Current |
| Used for | Sizing breaker size and wire size for motors |
| Related term | FLA (Full Load Amps) |
| FLA is used for | Sizing overload protection for motors |
| FLC value source | UL 508A standard, National Electrical Code (NEC) |
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What You'll Learn
FLC stands for Full Load Current
The FLC value can be found in the National Electrical Code (NEC) tables for AC and DC motors. In the NEC, FLC is also referred to as "Table Value". The FLC is not just associated with motors, as the UL 508A standard requires that the FLC value of a control panel must be indicated on its nameplate.
FLC is considered the proper methodology when sizing electrical systems, as it generally covers all HP motors. The FLC value can be used to size breaker and wire sizes for motors. It is important to note that the FLC value is typically higher than the FLA (Full Load Amperage) value, which is the actual known capacity of a particular motor.
FLA is an important specification to consider when selecting and sizing electrical equipment, as it helps determine the appropriate circuit protection and electrical components required for safe and efficient motor operation. The FLA value is indicated on the motor nameplate and is used to regulate overload protection. While FLC and FLA have different applications and values, they are often used interchangeably in the electrical field.
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FLC is used to determine short-circuit protection
FLC stands for "Full-Load Current". It is a standard value given in tables 50.1 (for AC motors) and 50.2 (for DC motors) of the UL 508A standard. The FLC value is used to determine short-circuit protection, cable size, and the size of the main disconnecting device of a control panel.
In the past, the UL 508A standard defined FLC as "Full-Load Ampere Rating". However, this term was changed to "Full-Load Current" in the NFPA 79 standard to avoid confusion with the term "FLA", which stands for "Full Load Amps". FLA is the rated current of the motor and is indicated on the nameplate of the motor.
FLC is used to size breaker size and wire size for motors, while FLA is used to size overload protection for motors. The FLC tables are found at the end of Article 430 and are used to ensure that the permanent wiring installed for motor circuits is large enough for any motor design of a particular horsepower rating.
For example, a 460-480 V three-phase motor has a nominal current (FLA) of 4.2 A (as declared by the manufacturer) and an FLC of 4.8 A (as given by Table 50.1 of the UL 508A standard). The FLC value is used to determine the short-circuit protection, cable size, and size of the main disconnecting device for this motor.
In summary, FLC is used to determine short-circuit protection by providing a standard value that corresponds to the power (horsepower) of the motor. This value is then used to size the breaker, wire, and cable for the motor circuit, ensuring that the wiring is large enough to handle the motor's power and providing protection against short circuits.
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FLC is used to determine cable size
FLC stands for "Full-Load Current", which is a standard value given in tables for AC and DC motors. It is used to determine the theoretical capacity of a motor, and is associated with the power (HP) of the motor.
FLC is used to determine the size of cables, as well as the size of the main disconnecting device of a control panel. It is considered the proper methodology when sizing electrical systems, as it generally covers all HP motors. FLC is used when sizing breaker size and wire size for motors.
The FLC value is a current value associated with the power (HP) of the motor. To each "Horse Power" value corresponds an FLC value. FLC is used to determine the theoretical capacity of a motor, while FLA (Full Load Amps) describes a particular motor's actual known capacity.
FLA is located on the motor and is used to size overload protection for motors. It is the rated current of the motor, and this value is indicated directly onto the nameplate of the motor. The FLC value, on the other hand, is found in standard tables.
It is important to note that the FLC value is not just associated with motors. The FLC value of a control panel, for example, must be indicated on its nameplate.
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FLC is used to determine the size of the main disconnecting device
FLC stands for Full Load Current, which is the current value associated with the power of a motor. It is used to determine the theoretical capacity of a motor and is provided as standard values in tables for AC and DC motors.
The FLC value is found in the National Electrical Code (NEC) tables for AC and DC motors. In the NEC, FLC is also referred to as "Table Value". By using the FLC value from these tables, engineers can determine the size of the disconnecting device required for a specific motor.
FLC is considered the proper methodology when sizing electrical systems because it generally covers all HP motors. While FLA (Full Load Amperage) is an important specification to consider when selecting electrical equipment, it is located on the motor and is used to size overload protection. In contrast, FLC is used to size and design cables, overcurrent devices, and switches.
It is important to note that the FLC value in the tables may not always match the FLA value found on the motor's nameplate. This is because the FLC value is a theoretical value, while the FLA value is the actual known capacity of a particular motor. Therefore, when designing an electrical system, it is crucial to refer to the FLC value to ensure the system can handle the motor's power requirements.
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FLC is considered the proper methodology when sizing electrical systems
FLC stands for Full Load Current, which is the standard value given in tables for AC and DC motors. It is a current value associated with the power of the motor. FLC is considered the proper methodology when sizing electrical systems as it generally covers all HP motors.
FLC is used to determine the theoretical capacity of a motor. It is used to size breaker size and wire size for motors. It is also used to determine short-circuit protection, cable size, and the size of the main disconnecting device of a control panel. The FLC value of a control panel must be indicated on its nameplate.
FLA, or Full Load Amperage, is the value indicated on a motor's nameplate. It refers to the current that a motor draws from the power supply when operating at full load or maximum capacity. While FLA is important when selecting and sizing electrical equipment, it is not interchangeable with FLC. This is because the FLA of the motor is always less than the FLC in the tables.
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Frequently asked questions
FLC stands for Full Load Current.
FLA stands for Full Load Amperage and is located on the motor. FLC and FLA mean the same thing for the most part, but the FLA of a motor is usually less than the FLC in tables.
FLC is used to determine the theoretical capacity of a motor. It is also used when sizing breaker and wire sizes for motors.
The FLC value is used to determine short-circuit protection, cable size, and the size of the main disconnecting device of a control panel.
The FLC value can be found in the National Electrical Code (NEC) table.
