What is the total lighting load on a 120V circuit for six 100W incandescent lights and four fluorescent fixtures with a ballast rating of 1.5A?

• A. 12.50A
• B. 13.25A
• C. 13.50A
• D. 13.75A

Answer: (D)

To determine the total lighting load on a 120V circuit, you'll first need to calculate the wattage used by each type of light fixture and then convert that into amperes (A).

Start with the incandescent lights. Since there are six 100W incandescent lights, the total wattage contributed by the incandescent fixtures is:

6 lights x 100W/light = 600W

Next, calculate the wattage for the fluorescent fixtures. The ballast rating is given in amperes, so you need to convert this into watts. Since the lights are operated on a 120V circuit, you can use the formula:

Power (W) = Voltage (V) x Current (A)

For the four fluorescent fixtures with a ballast rating of 1.5A each, the total current draw for the ballasts is:

4 fixtures x 1.5A/fixture = 6A

Now, convert this current into watts:

6A x 120V = 720W

Now, add the two wattage amounts together to find the total wattage for the circuit:

600W (incandescent) + 720W (fluorescent) = 1320W

Now, to find the total current load in amperes