PAANO GUMAWA NG LOAD COMPUTATION PARA SA MAIN CIRCUIT BREAKER/ Schedule of loads computation

Introduction

This tutorial provides a comprehensive guide on how to perform load computations for a main circuit breaker. Understanding load computations is crucial for ensuring electrical safety and efficiency in construction and electrical installations. This guide will walk you through the steps needed to create a load schedule that meets your electrical requirements.

Step 1: Gather Necessary Information

Before beginning the computation, collect all relevant details regarding the electrical appliances and systems to be included in the load calculation.

• List all electrical devices that will be connected.
• Record the wattage (or current rating) of each device. This information can usually be found on the device label.
• Understand the usage patterns for each device (e.g., continuous use, intermittent use).

Step 2: Calculate Total Load

Once you have the necessary information, you can calculate the total load for the circuit.

• Convert wattage to amperes: Use the formula: [ \text{Amperes} = \frac{\text{Watts}}{\text{Voltage}} ]
• Sum up the amperage of all devices to find the total load.
• Keep in mind that for circuits with multiple devices, you may need to account for diversity factors based on their usage.

Step 3: Determine the Main Circuit Breaker Size

With the total load calculated, the next step is to determine the appropriate size for the main circuit breaker.

• Use the total amperage calculated in Step 2.
• Select a circuit breaker that is rated higher than your total load to ensure safety. A common recommendation is to add a safety margin of 25% to prevent tripping during peak loads.
• Choose a breaker size that complies with local electrical codes.

Step 4: Create a Schedule of Loads

Document the load computations in a clear and organized manner.

• Create a table that lists:
  • Device Name
  • Wattage
  • Amperage
  • Usage Pattern (continuous or intermittent)
• Include the total load at the bottom of the table for quick reference.

Step 5: Review and Verify

Before finalizing the load computation, review all calculations and assumptions.

• Double-check the wattage and amperage figures for accuracy.
• Ensure that all devices are accounted for in the schedule.
• Consider consulting with a licensed electrician to validate your findings and ensure compliance with local regulations.

Conclusion

Performing load computations for a main circuit breaker is essential for safe and efficient electrical installations. By following the outlined steps, you can create an accurate load schedule that meets your needs. Ensure to keep the documentation updated and consult professionals when necessary to maintain compliance with electrical standards.