Which NEC table provides guidance for general lighting loads in non-dwelling occupancies?

Which NEC table provides guidance for general lighting loads in non-dwelling occupancies?

• A. NEC Table 220.42(A)
• B. NEC Section 230.42
• C. NEC Section 430.6(A)(1)
• D. NEC Section 220.14(A)

Answer: (A)

The main idea here is how to estimate the general lighting load for non-dwelling occupancies. In NEC, there is a table that lists the standard watts-per-square-foot values for different types of non-dwelling spaces. To size feeders and the service, you multiply the building’s floor area by the value from this table to get the general lighting load. This provides a quick, consistent way to account for lighting without listing every fixture. After you obtain that load, you can apply any applicable demand factors later, per Article 220. The other options point to sections that handle different topics—service equipment and disconnects, motor load calculations, or lighting loads for dwelling units—so they don’t provide the general lighting-load guidance used for non-dwellings.

The main idea here is how to estimate the general lighting load for non-dwelling occupancies. In NEC, there is a table that lists the standard watts-per-square-foot values for different types of non-dwelling spaces. To size feeders and the service, you multiply the building’s floor area by the value from this table to get the general lighting load. This provides a quick, consistent way to account for lighting without listing every fixture. After you obtain that load, you can apply any applicable demand factors later, per Article 220.

The other options point to sections that handle different topics—service equipment and disconnects, motor load calculations, or lighting loads for dwelling units—so they don’t provide the general lighting-load guidance used for non-dwellings.