Generally 3 phase power lines are a series of 3 lines running on the top of a utility pole. Often times they look like a T with the lines running on top. Sometimes there are occasional exceptions to these configurations.
If the pole has only two wires near the top of the pole, with one above the other and there is no T-bar, this is a single phase line.
Wires not near the top of the pole should not be included in the total amount of wires as these are often for telecommunication lines and not power lines.