When three Level II EVSE draw 24 amperes each on a 3-phase, 4-wire system, what is the line current on each phase?

To understand how to calculate the line current on each phase in a 3-phase, 4-wire system when three Level II Electric Vehicle Supply Equipment (EVSE) draw 24 amperes each, it is essential to consider how currents operate in such systems.

In a balanced 3-phase system, the total current drawn from the source is distributed among the three phases. Each EVSE draws 24 amperes, leading to the following equation for line current when connected to a 3-phase system:

1. For each of the 3 phases, the current drawn is the sum of the currents from all connected loads divided by the square root of the number of phases if the load is balanced.

2. Here, since there are three EVSEs, each drawing 24 A, the total current would be (24 A \times 3 = 72 A).

3. However, because this is a 3-phase system, the phase current needs to be calculated. In this case, the line current can be derived from the formula for 3-phase power (I_{line} = \sqrt{3} \times I_{phase}) or directly considering that each EVSE operates across the phases depending on their connections.