| A.C distribution | D.C. distribution |
|---|---|
| 3 phase A.C distribution system requires 4 wires. | D.C distribution system requires only one wire with the ground as a return path. |
| The voltage at the far end is a less i.e. voltage drop in the distributor is more to the presence of inductance. | Therefore the cost of erection is less than the A.C system. |
| The efficiency of power transmission is less . | Voltage drop is less in the distributor due to the absence of inductance voltage regulation is good. |
| 3phase 3 wire 4 wire are the types of the A.C distribution system. | The transformer cannot be used for improving voltage level. |