Nate Core Practice Test 2026 - Free Practice Questions and Study Guide

To determine the expected amp draw on a hot water heater element, you can use the formula:

\[ \text{Amperes} = \frac{\text{Watts}}{\text{Volts}} \]

In this case, the hot water heater element is rated at 4,500 watts and operates at 220 volts. Plugging in these values:

\[ \text{Amperes} = \frac{4,500 \text{ watts}}{220 \text{ volts}} \]

When you perform the calculation, you find:

\[ \text{Amperes} = 20.45 \text{ Amperes} \]

When considering the context of amp draws, it is common to round to the nearest whole number based on typical electrical practices. Thus, this value corresponds most closely to 20 Amperes.

Understanding this calculation is crucial because it allows HVAC technicians to size wiring and circuit breakers properly, ensuring safety and efficiency in electrical systems. Additionally, knowing how to apply basic electrical formulas is a fundamental skill for anyone working within the HVAC field.