1. What is RLA (Running Load Amps)?

RLA (Running Load Amps) is the current drawn by an electric motor during normal operation. For continuous operation, RLA is typically equal to FLA (Full Load Amps), which is the maximum current a motor draws when operating at full load capacity.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( RLA \) — Running Load Amps (amps)
• \( FLA \) — Full Load Amps (amps)

Explanation: For continuous operation, the running current typically equals the full load current. However, in some applications with intermittent loads, RLA may be less than FLA.

3. Importance of RLA Calculation

Details: Knowing RLA is essential for proper circuit design, selecting appropriate wire sizes, circuit breakers, and overload protection devices to ensure safe and efficient motor operation.

4. Using the Calculator

Tips: Enter the motor's Full Load Amps (FLA) value, which can typically be found on the motor nameplate. The calculator will output the Running Load Amps (RLA).

5. Frequently Asked Questions (FAQ)

Q1: Is RLA always equal to FLA?
A: For continuous operation, yes. However, for applications with intermittent loads, RLA may be less than FLA.

Q2: Where can I find the FLA value?
A: FLA is typically listed on the motor nameplate or in the manufacturer's specifications.

Q3: What's the difference between RLA and LRA?
A: RLA is running current, while LRA (Locked Rotor Amps) is the current drawn during motor startup, which is typically much higher.

Q4: How does RLA affect circuit design?
A: RLA determines the required ampacity of conductors and the sizing of protection devices to prevent overheating during normal operation.

Q5: Should I use RLA or FLA for sizing components?
A: Both are important - RLA for normal operation conditions and FLA for maximum load conditions.