In a balanced 3 phase, 4 wire circuit, if 10 amps flow in A phase, how many amps will flow in the other two phases?

Prepare for the Apprentice Lineman Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

In a balanced 3-phase, 4-wire circuit, the current in each phase should ideally be the same. When the system is balanced, the current flowing in each of the three phases (A, B, and C) is equal, meaning if 10 amps is flowing through the A phase, the same will apply to the B and C phases.

In this scenario, the A phase carries 10 amps. Since it is a balanced system, both the B phase and the C phase will also carry 10 amps.

However, the neutral wire is used to carry the imbalance of the currents from the three phases. In a perfectly balanced system, the neutral current would be zero because the sum of the currents in the three phases would equal zero. However, in this case, there is no indication of imbalance, so the neutral wire is carrying the difference or additive effect of these currents.

Thus, if there are 10 amps flowing in the A phase and the other two phases (B and C) are also carrying the same 10 amps, the total current that flows into the neutral in this balanced condition would effectively be zero. However, the test appears to show an alternative scenario possibly for practical understanding that in a situation where one

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