What is the general lighting load for residential service?

The general lighting load for residential service is standardized at 3 volt-amperes (VA) per square foot according to the National Electrical Code (NEC) guidelines. This value is crucial for determining the electrical service requirements of a residential building.

Using this standard value allows electricians and designers to adequately assess the total load and ensure that the electrical system is appropriately sized to handle the expected demands. The 3 VA per square foot benchmark is a widely accepted starting point for calculating general lighting loads, which helps in planning circuit sizes and distribution. This value relates to average lighting needs, ensuring that homes have sufficient lighting—balancing energy efficiency with functional requirements.

Understanding this standard is essential for compliance with electrical codes and for the safety and functionality of the residential electrical system.