What should be done if the load schedule reflects a 20AT/2.0-sq.mm. lighting branch circuit with an overrated circuit breaker?

The correct approach in this scenario involves checking the wiring layout and the groupings due to several factors that impact the safety and functionality of the electrical installation. A 20AT-rated branch circuit suggests that the circuit breaker is rated higher than what the conductors and the connected load can handle, potentially leading to overload situations.

By examining the wiring layout, one can verify how the loads are distributed across the circuit and if they're appropriate for the current ratings of the conductors and circuit protection. Understanding the groupings helps in determining how many circuits are combined, ensuring they match the expected load and adhere to safety regulations. This assessment is vital to ensure that the installation complies with the Philippine Electrical Code (PEC) guidelines, which emphasize proper load management to prevent overheating and fire hazards.

This emphasis on layout and groupings is crucial, particularly when there might be discrepancies in the load schedule or circuit ratings, as it directly affects the reliability of the electrical system. Taking this route allows for a thorough evaluation and corrective action if needed, ensuring that safety standards are met and the system operates efficiently. Other options, such as having a superior handle it, looking for another load schedule, or adjusting the circuit breaker rating, do not address the immediate necessity to assess the actual installation