Where an overhead line crosses or is in proximity to any telecommunication line, the owner of the overhead line or the telecommunication line, whosoever lays his line later, shall arrange to provide for protective devices or guarding arrangement as per code of practice or guidelines issued by Power and Telecommunication Coordination Committee and shall observe the following provisions, namely: –
(i) when it is intended to lay a telecommunication line or an overhead line which will cross or be in proximity to an overhead line or a telecommunication line, as the case may be, the person proposing to lay such line shall give one month notice of his intention so to do along with the relevant details of protection and drawings to the owner of the existing line;
(ii) guarding arrangement shall be provided where a line of voltage not exceeding 33 kV crosses a road or street or telecommunication line;
(iii) where an overhead line crosses or is in proximity to another overhead line, guarding arrangements shall be provided so as to safeguard against the possibility of their coming into contact with each other; and
(iv) where an overhead line crosses another overhead line, minimum clearances as provided in the table below shall be ensured:- Minimum clearances in metre between lines crossing each other Sl.
No.
Nominal System Voltage (kV) 11-66 kV 110-132 kV 220 kV 400 kV 765 kV 1200 kV
1. below 11 2.44 3.05 4.58 5.49 7.94 10.44
2. 11-66 2.44 3.05 4.58 5.49 7.94 10.44
3. 110-132
3.05
3.05 4.58 5.49 7.94 10.44
4. 220 4.58 4.58 4.58 5.49 7.94 10.44
5. 400 5.49 5.49 5.49 5.49 7.94 10.44
6. 765
7.94
7.94 7.94 7.94 7.94 10.44 7 1200 10.44 10.44 10.44 10.44 10.44 10.44
Provided that no guarding arrangement is required when an electric line of voltage exceeding 33 kV crosses over another line of 250 V and above voltage or a road or a tram subject to the condition that adequate clearances are provided between the lowest conductor of the line of voltage exceeding 33 kV and the top most conductor of the overhead line crossing underneath the line of voltage exceeding 33 kV and the clearances as stipulated in regulation 60 from the topmost surface of the road maintained;
(v) where an overhead direct current line crosses another overhead line, minimum clearances as provided in the table below shall be ensured:- Minimum clearances in metre between AC and DC lines crossing each other Sl.No. System Voltage AC/DC 100 kV DC 200 kV DC 300 kV DC 400 kV DC 500 kV DC 600 kV DC 800 kV DC
1. below 11 kV AC 3.05 4.71 5.32 6.04 6.79 7.54 9.04
2. 11-66 kV AC 3.05 4.71 5.32 6.04 6.79 7.54 9.04
3. 110-132 kV AC 3.05 4.71 5.32 6.04 6.79 7.54 9.04
4. 220 kV AC 4.58 4.71 5.32 6.04 6.79 7.54 9.04 [भाग III—खण्ड 4] भारतकाराजपत्र:असाधारण 129
5. 200 kV DC 4.71 4.71 5.32 6.04 6.79 7.54 9.04
6. 300 kV AC 5.32 5.32 5.32 6.04 6.79 7.54 9.04
7. 400 kV AC 5.49 5.49 5.49 6.04 6.79 7.54 9.04
8. 400 kV DC 6.04 6.04 6.04 6.04 6.79 7.54 9.04
9. 500 kV DC 6.79 6.79 6.79 6.79 6.79 7.54 9.04
10. 600 kV DC 7.54 7.54 7.54 7.54 7.54 7.54 9.04
11. 765 kV AC 7.94 7.94 7.94 7.94 7.94 7.94 9.04
12. 800 kV DC 7.94 7.94 7.94 7.94 7.94 9.04 9.04
13. 1200 kV AC 10.44 10.44 10.44 10.44 10.44 10.44 10.44
(vi) a person laying or proposing to lay a line which may cross or be in proximity with an existing line, shall provide arrangements on his own line or require the owner of the other overhead line to provide guarding arrangements as referred to in clause (iii) and (iv);
(vii) in all cases referred to in this regulation the expenses of providing the guarding arrangements or protective devices shall be borne by the person whose line was laid later;
(viii) where two lines cross each other, the crossing shall be made as nearly at right angles as the nature of the case admits and as near the support of the line as practicable, and the support of the lower line shall not be placed in the right of way of the upper line; and
(ix) the guarding arrangement shall be carried out by the owner of the support on which it is made and he shall be responsible for its proper maintenance.