The figure of a star connection is shown below. Observe the figure and correct mistakes, if any, and answer the questions:

(a) Each end of the secondary coils coming out of a distribution transformer is connected to a common point. What is the name given to the line that starts from here?

(b) Which pairs of lines are used in household electrical wiring? What will be the voltage between them?

(c) What is the voltage between two phase lines?

In the given figure, the potential difference between the poles is 230V but in case of star connected network in the household, the potential difference between two phases is 400V. The potential difference between line and phase is 230. So the star connection should be like the following.

a) The line that starts from the common point is called neutral line. The potential of this line is zero.

b) The phase line, neutral line, and earth line are used in the household electrical winding. The voltage difference between a phase line and the neutral line is 230V.

c)The voltage between two phase lines is 400V.