The norms in this regard are regulated by the provisions of Section 10 of the Indian Telegraph Act, 1885 read with those of Section 164 of the Electricity Act, 2003:
10. Power for telegraph authority to place and maintain telegraph lines and posts.—The telegraph authority may, from time to time, place and maintain a telegraph line under, over, along, or across, and posts in or upon any immovable property:
Provided that—
(a) the telegraph authority shall not exercise the powers conferred by this section except for the purposes of a telegraph established or maintained by the [Central Government], or to be so established or maintained;
(b) the [Central Government] shall not acquire any right other than that of user only in the property under, over, along, across in or upon which the telegraph authority places any telegraph line or post; and
(c) except as hereinafter provided, the telegraph authority shall not exercise those powers in respect of any property vested in or under the control or management of any local authority, without the permission of that authority; and
(d) in the exercise of the powers conferred by this section, the telegraph authority shall do as little damage as possible, and, when it has exercised those powers in respect of any property other than that referred to in clause (c), shall pay full compensation to all persons interested for any damage sustained by them by reason of the exercise of those powers.
Section 164. (Exercise of powers of Telegraph Authority in certain cases):
The Appropriate Government may, by order in writing, for the placing of electric lines or electrical plant for the transmission of electricity or for the
purpose of telephonic or telegraphic communications necessary for the proper co-ordination of works, confer upon any public officer, licensee or any other
person engaged in the business of supplying electricity under this Act, subject to such conditions and restrictions, if any, as the Appropriate Government may think fit to impose and to the provisions of the Indian Telegraph Act, 1885, any of the powers which the telegraph authority possesses under that Act with respect to the placing of telegraph lines and posts for the purposes of a telegraph established or maintained, by the Government or to be so established or maintained.
The work undertaken by the Contractor is lawful if he is engaged by the duly authorized public officer or the licensee. You are only entitled for the damages and not market value of the land.