What is the lighting load on a 120V circuit for six 100W incandescent lights and four fluorescent fixtures with a ballast rating of 1.5A, all operating continuously for 8 hours per day?

To determine the total lighting load on the circuit, it's important to calculate the current drawn by both the incandescent lights and the fluorescent fixtures.

First, for the six 100W incandescent lights:

The total wattage is calculated by multiplying the number of lights by the wattage of each light:

6 lights × 100W = 600W.

Next, to find the current for these lights on a 120V circuit, use the formula:

Current (I) = Power (P) / Voltage (V).

So the current for the incandescent lights is:

600W / 120V = 5A.

Now, for the four fluorescent fixtures, which require a ballast rated at 1.5A for each fixture:

The total current drawn is:

4 fixtures × 1.5A = 6A.

Now combine the currents from both the incandescent lights and the fluorescent fixtures:

5A (for the incandescent lights) + 6A (for the fluorescent fixtures) = 11A.

This value represents the total current for the lighting load on the circuit under normal operation conditions.

However, when considering continuous operation, the National Electrical Code (NEC) typically requires that circuits be rated at 125% of the continuous