New York State Master Electrician Practice Exam

To determine the total kVA for appliances in a 1,500 square foot unit, one must consider both the electrical demand of common household appliances and the general guidelines for estimating power needs based on the unit's size.

In residential units, the National Electrical Code (NEC) provides some guidance on calculating loads. Typically, for residential spaces, estimations are made by considering the typical load factors for kitchen appliances, heating and cooling systems, lighting, and other electrical equipment that tends to be utilized frequently.

Option B, totaling 25.5 kVA, is likely derived from a careful aggregation of the expected loads of essential appliances and systems present within the unit, including instances like:

- Major appliances (refrigerators, water heaters, air conditioning units).

- Lighting loads, calculated at a certain watts-per-square-foot ratio.

- Any additional equipment that might be utilized for particular needs in the apartment.

Notably, the calculation may also include additional factors for continuous loads and demand factors, ensuring that the total kVA is reflective of actual usage.

This methodology in arriving at the total kVA illuminates the importance of evaluating the specifications of the actual appliances and their operational characteristics, which support the estimation of 25.5 kVA as