Oklahoma Electrical Practice Exam

What is the total load in amps for a 240v single-phase dairy setup with loads of 18,000VA, 16,000VA, and 10,000VA?

1. 130 amps

2. 152 amps

3. 160 amps

4. 170 amps

The correct answer is: 152 amps

To determine the total load in amps for a 240V single-phase system, you first need to calculate the total VA (volt-amperes) by summing up the individual loads. In this case, the loads are 18,000VA, 16,000VA, and 10,000VA. The calculation for total load in VA is as follows: Total VA = 18,000 + 16,000 + 10,000 = 44,000 VA. Next, to find the total current (in amps), you use the formula: Current (I) = Total VA / Voltage (V). By substituting the total VA and the voltage into the formula, we have: I = 44,000 VA / 240 V. Performing the calculation gives: I = 183.33 amps. It seems like the answer provided does not match this calculation. To obtain a commonly rounded value used in practical scenarios, you might look to approximate or consider typical safety factors used in electrical loads or scenarios that could involve some additional parameters. However, based on pure calculation, the current appears to be higher than the options listed. In this context, the identification of the correct answer hinges on the understanding of how