In a three-phase supply system with 14 single-pole circuits and 4 three-pole circuits, what is the minimum number of poles required?

To calculate the minimum number of poles required in a three-phase supply system that includes both single-pole and three-pole circuits, it is essential to understand how each type of circuit contributes to the total number of poles.

Single-pole circuits are used typically in single-phase applications but can be part of a three-phase system. In this case, there are 14 single-pole circuits. Each single-pole circuit uses one pole. Therefore, the contribution from the single-pole circuits is 14 poles.

Three-pole circuits are specifically designed for three-phase systems and utilize all three phases. Each three-pole circuit uses three poles. In this scenario, there are 4 three-pole circuits. Consequently, they contribute a total of 4 circuits × 3 poles per circuit = 12 poles.

To find the minimum number of poles required, simply add the total number of poles contributed by both single-pole and three-pole circuits:

14 poles (from single-pole circuits) + 12 poles (from three-pole circuits) = 26 poles.

It appears that the answer provided does not match this calculation. Therefore, the correct calculation would indicate a different total than stated. The answer ultimately displays a misunderstanding of how the total