In a 120/240-volt, single-phase, 3-wire transformer-fed panelboard, circuit number 34 is connected to which conductor?

In a 120/240-volt, single-phase, 3-wire transformer-fed panelboard, circuit number 34 is connected to which conductor?

• A. BØ
• B. AØ
• C. CØ
• D. DØ

Answer: (B)

In a 120/240-V single-phase, 3-wire panelboard, there are two hot legs (opposite phases) and a common neutral. To keep the load balanced, branch circuits are typically landed on the two hot legs in an alternating pattern as you go through the circuit numbers: odd numbers on one leg, even numbers on the other. Circuit 34 is even, so it is connected to the second hot leg. The neutral stays on its common neutral bus and does not determine which leg a circuit uses. Therefore, circuit 34 is connected to the second hot leg.

In a 120/240-V single-phase, 3-wire panelboard, there are two hot legs (opposite phases) and a common neutral. To keep the load balanced, branch circuits are typically landed on the two hot legs in an alternating pattern as you go through the circuit numbers: odd numbers on one leg, even numbers on the other. Circuit 34 is even, so it is connected to the second hot leg. The neutral stays on its common neutral bus and does not determine which leg a circuit uses. Therefore, circuit 34 is connected to the second hot leg.