As an expert in the field of electrical engineering, I'm well-versed in the calculations and principles that govern the relationship between watts, volts, and amps. To determine how many amps 4500 watts equates to, we must first understand the basic formula that relates these three electrical units: Power (in watts) is equal to the product of voltage (in volts) and current (in amps), or mathematically expressed as \( P = V \times I \).

Given the information that 5500 watts at 240 volts equates to 23 amps, we can infer that the voltage in this scenario is 240 volts. If we apply this to the 4500 watts case, assuming the same voltage, we can rearrange the formula to solve for the current (amps), which is \( I = \frac{P}{V} \).

Let's do the math:
\[ I = \frac{4500 \text{ watts}}{240 \text{ volts}} \]
\[ I = 18.75 \text{ amps} \]

This calculation gives us the theoretical current draw for a purely resistive load of 4500 watts at 240 volts. However, it's important to consider real-world applications and safety factors. For instance, the breaker size and wire gauge are crucial in determining the maximum safe current draw. As per the provided reference, a breaker is sized at 30 amps, and for safety, permanent draw loads should be sized at 80% of the breaker's capacity. This means that even if a breaker is rated for 30 amps, for safety, it should be used for a maximum of 24 amps (30 amps * 80%). If we were to follow this guideline strictly for a 20-amp breaker, it would be limited to 16 amps (20 amps * 80%).

It's also worth noting that the wire gauge (AWG) plays a role in the maximum current it can safely carry without overheating. The 10 AWG wire mentioned is a relatively thick wire that can handle a substantial amount of current, which is suitable for the loads discussed.

In summary, while the theoretical calculation for 4500 watts at 240 volts is 18.75 amps, practical considerations such as breaker sizing and wire gauge must be taken into account to ensure safety and compliance with electrical codes.

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Since this is a purely resistive load 5500 watts at 240 volts is 23 amps, breaker is sized at 30 amps and 10 awg wiring is used. In your case if the elements are strapped for 4500 watts draw is 18.75 amps, permanent draw loads should be sized at 80% of breaker capacity so a 20 amp breaker is limited to 16 amps.Nov 24, 2011read more >>