What is the load for three 120V outlets for heavy-duty lamp holders?

To find the total load for three 120V outlets for heavy-duty lamp holders, it's important to consider the current capacity and power factor of the lamps being used. Assuming that each lamp holder can draw up to 600VA, this calculation can be made as follows:

First, calculate the power for one outlet, which is 120V multiplied by the current it draws (in amps). When using heavy-duty lamp holders, they are generally rated for more power than standard outlets. Each outlet can be assumed to support a maximum load of 600VA (watts). Thus, for three outlets, the calculation would be:

600VA (per outlet) × 3 outlets = 1800VA.

This aligns with the choice indicated as the correct answer, as it accurately reflects the total power capacity of the three outlets utilized for heavy-duty lamps. The consideration of the equipment capacity and understanding the nature of the load allows you to correctly determine the total load for those specific lamp holders.