Show-window lighting load measurement is expressed as which of the following?

Show-window lighting load measurement is expressed as which of the following?

• A. 200 volt-amperes/linear foot
• B. Horizontally along all sides of the window
• C. Horizontally along the base of the window
• D. Either A or B

Answer: (A)

Show-window lighting load is quantified as a load per unit length of the window opening. The standard uses 200 volt-amperes for each linear foot of window width, so you multiply the window width (in feet) by 200 VA to get the total load. This per-foot basis lets you size circuits consistently for windows of different sizes. The other descriptions talk about where you measure on the window rather than the unit of measure itself, so they aren’t the expression used. Therefore, the expression is 200 volt-amperes per linear foot.

Show-window lighting load is quantified as a load per unit length of the window opening. The standard uses 200 volt-amperes for each linear foot of window width, so you multiply the window width (in feet) by 200 VA to get the total load. This per-foot basis lets you size circuits consistently for windows of different sizes. The other descriptions talk about where you measure on the window rather than the unit of measure itself, so they aren’t the expression used. Therefore, the expression is 200 volt-amperes per linear foot.