Full Text
REGD. No. D. L.-33004/99
The Gazette of India
CG-DL-E-13102025-266889
EXTRAORDINARY
PART III—Section 4
PUBLISHED BY AUTHORITY
No. 670]
NEW DELHI, FRIDAY, OCTOBER 10, 2025/ASVINA 18, 1947
CENTRAL ELECTRICITY AUTHORITY
NOTIFICATION
New Delhi, the 9th October, 2025
F No. CEA-TH-17/1/2021-TETD Division. — Whereas public notice advertising the draft of the
Central Electricity Authority (Technical Standards for Construction of Electrical Plants and Electric Lines)
Amendment Regulations, 2025, was published in six newspaper dailies, as required by sub-section (3) of
section 177 of the Electricity Act, 2003 (36 of 2003) read with sub-rule (2) of rule 3 of the Electricity
(Procedure for Previous Publication) Rules, 2005, for inviting objections and suggestions from all persons
likely to be affected thereby, within the period of thirty days, from the date on which the copies of the said draft
regulations were made available to the public;
And whereas copy of the public notice as advertised in the newspapers and the said draft regulations
were made available to the public on the website of the Central Electricity Authority on 01st May, 2025;
And whereas the objections and suggestions were received from the public on the said draft regulations
were considered by the Central Electricity Authority;
Now, therefore, in exercise of the powers conferred under clause (e) of sub-section (2) of section 177
of the Electricity Act, 2003 (36 of 2003) read with clause (b) of section 73 of the said Act, the Central
Electricity Authority hereby makes the following regulations to amend the Central Electricity Authority
(Technical Standards for Construction of Electrical Plants and Electric Lines) Regulations, 2022, namely:
1. Short title and commencement.- (1) These regulations may be called the Central Electricity Authority
(Technical Standards for Construction of Electrical Plants and Electric Lines) Amendment Regulations,
2025.
(2) They shall come into force on the date of their publication in the Official Gazette.
2. In the Central Electricity Authority (Technical Standards for Construction of Electrical Plants and Electric
Lines), 2022 (hereinafter referred to as the said regulations), in sub-regulation (4) of regulation 84, the
following provisos shall be inserted, namely: -
""Provided that if the considered Right-of-Way values are different from the specified Right-of-Way
values in SCHEDULE-VII, due to change in conductor configuration or conductor type or due to use of
new technological options, the same shall be referred to the Authority for approval before implementation:
Provided further that the Authority, after due consideration, shall issue a separate order in that regard
for each of such cases.""
3. In the said regulations, in the SCHEDULE-VII for SCHEDULE-VII, the following SCHEDULE shall be
substituted, namely:-
"SCHEDULE-VII
(See sub-regulation (4) of regulation 84)
Table 1
Right-of-Way (RoW) for normal route, forest area, urban area, populated area and approach section
near substation for Lattice Structures with ACSR conductor
| Voltage level | Configuration | Conductor type | Terrain | Design Span(m) | String Type | Right-of-Way (RoW) width(m) |
|:--------------|:--------------|:---------------|:-------------------------------------------------------------------------|:---------------|:--------------------------------|:----------------------------|
| 765kV D/C | Vertical | ACSR ZEBRA | Normal route without constraint | 400 | "I" String "V" String Tension String | 67 |
| | | | Forest | 300 | "V" String Tension String | 56 |
| | | | Urban area or populated area or approach section near substation | 250 | "V" String Tension String | 54 |
| 765kV S/C | Vertical/Delta| ACSR BERSIMIS | Normal route without constraint | 400 | "I" String "V" String Tension String | 64 |
| | | | Forest | 300 | "V" String Tension String | 54 |
| | | | Urban area or populated area or approach section near substation | 250 | "V" String Tension String | 52 |
| 765kV S/C | Horizontal | ACSR BERSIMIS | Normal route without constraint | 400 | "I" String "V" String Tension String | 74 |
| | | | Forest | 300 | "V" String Tension String | 65 |
| | | | Urban area or populated area or approach section near substation | 250 | "V" String Tension String | 62 |
| ±800kV HVDC | Horizontal | ACSR Lapwing | Normal route without constraint or Forest or Urban area | 400 | "Y" String | 69 |
| ±500kV HVDC | Horizontal | ACSR Lapwing | Normal route without constraint or Forest or Urban area | 400 | "V" String | 52 |
| 400kV D/C | Vertical | ACSR MOOSE | Normal route without constraint | 400 | "I" String "V" String Tension String | 46 |
| | | | Forest | 300 | "V" String Tension String | 40 |
| | | | Urban area or populated area or approach section near substation | 250 | "V" String Tension String | 38 |
| 400kV S/C | Horizontal/ | ACSR MOOSE | Normal route without constraint | 400 | "I" String "V" String Tension String | 52 |
| | Vertical | | Forest | 300 | "V" String Tension String | 47 |
| | | | Urban area or populated area or approach section near substation | 250 | "V" String Tension String | 44 |
| 1200kV | Horizontal | ACSR Moose | Normal route without constraint or Forest or Urban area | 400 | "V" String | 89 |
| 220kV D/C | Vertical | ACSR ZEBRA | Normal route without constraint | 350 | "I" String "V" String Tension String | 32 |
| | | | Forest | 300 | "V" String Tension String | 28 |
| | | | Urban area or populated area or approach section near substation | 200 | "V" String Tension String | 24 |
| 132kV D/C | Vertical | ACSR PANTHER | Normal route without constraint | 320 | "I" String "V" String Tension String | 25 |
| | | | Forest | 200 | "V" String Tension String | 21 |
| 110 kV D/C | Vertical | ACSR PANTHER | Normal route without constraint | 305 | "I" String "V" String Tension String | 22 |
| | | | Forest | 200 | "V" String Tension String | 19 |
| | | | Urban area or populated area or approach section near substation | 150 | "V" String Tension String | 17 |
| 66 kV | Vertical | ACSR PANTHER | Normal route without constraint | 250 | "I" String "V" String Tension String | 18 |
| | | | Forest | 150 | "V" String Tension String | 14 |
| | | | Urban area or populated area or approach section near substation | 100 | "V" String | 13 |
Table 2
Right-of-Way (RoW) for Normal Route, Forest Area, Urban Area or Populated Area or Approach
Section near Substation for Pole Structures with ACSR conductor
| Voltage Level | Configuration | Conductor type | Terrain | Design Span (m) | String Type | Right-of-Way (ROW) width (m) |
|:--------------|:--------------|:---------------|:-------------------------------------------------------------------------|:----------------|:------------------------|:-----------------------------|
| 765 kV S/C | Vertical DELTA| ACSR BERSIMIS | Normal route without constraints | 250 | Tension String "I" String | 52 |
| | | | Forest area Urban area or Populated area or approach section near substation | 250 | Tension String "V" String | 46 |
| 400 kV D/C | Vertical | ACSR MOOSE | Normal route without constraint | 250 | Tension String "I" String | 36 |
| | | | Forest area Urban area or Populated area or approach section near substation | 250 | Tension String "V" String | 31 |
| 220 kV D/C | Vertical | ACSR ZEBRA | Normal route without constraint | 350 | Tension String "I" String | 31 |
| | | | Forest area | 250 | Tension String "I" String "V" String | 26 |
| | | | Urban area or Populated area or approach section near substation | 200 | Tension String "I" String | 24 |
| 132 kV D/C | Vertical | ACSR Panther | Normal route without constraint | 325 | "V" String Tension String "I" String | 25 |
| | | | Forest area | 200 | Tension String "I" String | 20 |
| | | | Urban area or Populated area or approach section near substation | 150 | "V" String Tension String "I" String | 18 |
| 110 kV D/C | Vertical | ACSR Lynx | Urban area or Populated area or approach section near substation | 150 | "V" String Tension String "I" String | 16 |
Table 3
Right-of-Way (RoW) for Normal Route, Forest Area, Urban Area or Populated Area or Approach
Section near Substation for Pole Structures with HTLS conductor
| Voltage Level | Configuration | Conductor type | Terrain | Design Span (m) | String Type | Right-of-Way (RoW) width (m) |
|:--------------|:--------------|:------------------|:-------------------------------------------------------------------------|:----------------|:------------------------|:-----------------------------|
| 400 kV D/C | Vertical | CFCC Dia:31.77mm | Normal route without constraint | 250 | Tension String "I" String | 34 |
| | | | Forest area Urban area or Populated area or approach section near substation | 250 | Tension String "V" String | 29 |
| 400kV D/C | Vertical | ACSS Dia:37.77mm | Normal route without constraint | 250 | Tension String "I" String | 39 |
| | | | Forest area Urban area or Populated area or approach section near substation | 250 | Tension String "V" String | 33 |
| 400kV D/C | Vertical | GAP Dia:29.9mm | Normal route without constrain | 250 | Tension String "I" String | 37 |
| | | | Forest area Urban area or Populated area or approach section near substation | 250 | Tension String "V" String | 31 |
| 220kV D/C | Vertical | CFCC Dia:28.14mm | Normal route without constraint | 350 | Tension String "I" String "V" String | 26 |
| | | | Forest area | 250 | Tension String "I" String "V" String | 23 |
| | | | Urban area or Populated area or approach section near substation | 200 | Tension String "I" String "V" String | 22 |
| 220kV D/C | Vertical | ACSS Dia:28.04mm | Normal route without constraint | 350 | Tension String "I" String "V" String | 33 |
| | | | Forest area | 250 | Tension String "I" String "V" String | 27 |
| | | | Urban area or Populated area or approach section near substation | 200 | Tension String "I" String "V" String | 25 |
| 220kV D/C | Vertical | GAP Dia:27.1mm | Normal route without constraint | 350 | Tension String "I" String "V" String | 31 |
| | | | Forest area | 250 | Tension String "I" String "V" String | 26 |
| | | | Urban area or Populated area or approach section near substation | 200 | Tension String "I" String "V" String | 24 |
| 132 kV D/C | Vertical | CFCC Dia:21 mm | Normal route without constraint | 320 | Tension String "I" String "V" String | 22 |
| | | | Forest area | 200 | Tension String "I" String "V" String | 18 |
| | | | Urban area or Populated area or approach section near substation | 150 | Tension String "I" String "V" String | 17 |
| 132 kV D/C | Vertical | ACSS Dia:20.5 mm | Normal route without constraint | 320 | Tension String "I" String "V" String | 26 |
| | | | Forest area | 200 | Tension String "I" String "V" String | 21 |
| | | | Urban area or Populated area or approach section near substation | 150 | Tension String "I" String "V" String | 19 |
| 132 kV D/C | Vertical | GAP Dia:20.60mm | Normal route without constraint | 320 | Tension String "I" String "V" String | 25 |
| | | | Forest area | 200 | Tension String "I" String "V" String | 20 |
| | | | Urban area or Populated area or approach section near substation | 150 | Tension String "I" String "V" String | 19 |
| 66 kV D/C | Vertical | CFCC Dia: 21 mm | Normal route without constraint | 250 | "I" string “V” String Tension String | 16 |
| | | | Forest | 150 | "V" String Tension String | 13 |
| | | | Urban or Populated on approach section near substation | 100 | “V” String Tension String | 12 |
| 66 kV D/C | Vertical | ACSS Dia: 20.5 mm | Normal route without constraint | 250 | "I" string "V" String Tension String | 20 |
| | | | Forest | 150 | "V" String Tension String | 16 |
| | | | Urban or Populated on approach section near substation | 100 | "V" String Tension String | 14 |
| 66 kV D/C | Vertical | GAP Dia: 20.6 mm | Normal route without constraint | 250 | "I" string "V" String Tension String | 21 |
| | | | Forest | 150 | "V" String Tension String | 14 |
| | | | Urban or Populated on approach section near substation | 100 | "V" String Tension String | 13 |
Table 4
Right-of-Way (RoW) for Normal Route, Forest Area, Urban Area or Populated Area or approach
Section near Substation for Lattice Tower Structures and HTLS conductor
| Voltage level (kV) | Configuration | Conductor type | Terrain | Design Span (m) | String Type | Right-of-Way (ROW) width (m) |
|:-------------------|:--------------|:------------------|:-------------------------------------------------------------------------|:----------------|:------------------------|:-----------------------------|
| 400 kV D/C | Vertical | CFCC Dia:31.77mm | Normal route without constraint | 400 | "I" string "V" String Tension String | 43 |
| | | ACSS Dia:37.77mm | Normal route without constraint | 400 | "I" string "V" String Tension String | 50 |
| | | GAP Dia:29.9 mm | Normal route without constraint | 400 | "I" string "V" String Tension String | 48 |
| | | CFCC Dia:31.77mm | Forest | 300 | “V” String Tension String | 38 |
| | | ACSS Dia:37.77mm | Forest | 300 | "V" String Tension String | 43 |
| | | GAP Dia:29.9mm | Forest | 300 | "V" String Tension String | 41 |
| | | CFCC Dia:31.77mm | Urban or Populated on approach section near substation | 250 | "V" String Tension String | 35 |
| | | ACSS Dia:37.77mm | Urban or Populated or approach section near substation | 250 | "V" String Tension String | 40 |
| | | GAP Dia:29.9mm | Urban or Populated or approach section near substation | 250 | "V" String Tension String | 38 |
| 220 kV D/C | Vertical | CFCC Dia:28.14mm | Normal route without constraint | 350 | "I" string "V" String Tension String | 27 |
| | | ACSS Dia:28.04mm | Normal route without constraint | 350 | "I" string "V" String Tension String | 33 |
| | | GAP Dia:27.1mm | Normal route without constraint | 350 | "I" string "V" String Tension String | 31 |
| | | CFCC Dia:28.14mm | Forest | 300 | "V" String Tension String | 24 |
| | | ACSS Dia:28.04mm | Forest | 300 | "V" String Tension String | 30 |
| | | GAP Dia:27.1mm | Forest | 300 | "V" String Tension String | 28 |
| | | CFCC Dia:28.14mm | Urban or Populated or approach section near substation | 250 | "V" String Tension String | 23 |
| | | ACSS Dia:28.04mm | Urban or Populated or approach section near substation | 250 | "V" String Tension String | 27 |
| | | GAP Dia:27.1mm | Urban or Populated or approach section near substation | 250 | "V" String Tension String | 26 |
| 132 kV D/C | Vertical | CFCC Dia:21 mm | Normal route without constraint | 320 | "I" string "V" String Tension String | 22 |
| | | ACSS Dia:20.5 mm | Normal route without constraint | 320 | "I" string "V" String Tension String | 27 |
| | | GAP Dia:20.60mm | Normal route without constraint | 320 | "I" string "V" String Tension String | 26 |
| | | CFCC Dia:21 mm | Forest | 200 | "V" String Tension String | 19 |
| | | ACSS Dia:20.5 mm | Forest | 200 | "V" String Tension String | 22 |
| | | GAP Dia:20.60mm | Forest | 200 | "V" String Tension String | 21 |
| | | CFCC Dia:21 mm | Urban or populated or approach section near substation | 150 | "V" String Tension String | 18 |
| | | ACSS Dia:20.5 mm | Urban or populated or approach section near substation | 150 | "V" String Tension String | 20 |
| | | GAP Dia:20.60mm | Urban or populated or approach section near substation | 150 | "V" String Tension String | 19 |
| 66 kV D/C | Vertical | CFCC Dia: 21 mm | Normal route without constraint | 250 | "I" string “V” String Tension String | 16 |
| | | ACSS Dia: 20.5 mm | Normal route without constraint | 250 | "I" string "V" String Tension String | 20 |
| | | GAP Dia: 20.6 mm | Normal route without constraint | 250 | "I" string "V" String Tension String | 21 |
| | | CFCC Dia: 21 mm | Forest | 150 | "V" String Tension String | 13 |
| | | ACSS Dia: 20.5 mm | Forest | 150 | "V" String Tension String | 16 |
| | | GAP Dia: 20.6 mm | Forest | 150 | "V" String Tension String | 14 |
| | | CFCC Dia:21 mm | Urban or Populated on approach section near substation | 100 | “V” String Tension String | 12 |
| | | ACSS Dia: 20.5 mm | Urban or Populated or approach section near substation | 100 | "V" String Tension String | 14 |
| | | GAP Dia: 20.6 mm | Urban or Populated or approach section near substation | 100 | "V" String Tension String | 13 |
Note: (a) D/C: double circuit; S/C: single circuit;
(b) for Carbon Fiber Composite Core (CFCC), Sag is calculated at 180 °C; for Aluminum Conductor
Steel Supported (ACSS), Sag is calculated at 250 °C; for Gap-type Aluminum Conductor Steel
Reinforced (GAP conductor), Sag is calculated at 210 °C.
(c) during the process of determining Right-of-Way (RoW) width, all the electrical clearances and safety
parameters including minimum live metal clearance, ground clearance, surface gradient, corona loss,
Radio Interference Voltage (RIV), Audible Noise and minimum mid-span separation between earth
wire and conductor, Electromagnetic Field (EMF i.e. induced voltages etc.) exposure limits and
design consideration for tower structure, shall be as per relevant standards and Central Electricity
Authority regulations.
(d) in the above Tables, the terms, “Forest”, “Urban”, “Populated", and "Approach Section Near
Substation" shall be understood in the context of extreme difficulty in the availability of transmission
corridor [Right-of-Way (RoW) corridor] for laying transmission lines.
(e) pole structure may be in any shape. It may be generally considered as a tapered hollow circular or
hexagonal or octagonal or multiple-side steel tube or pipe and it includes both mono pole structure and
twin-pole structure.".
RAKESH KUMAR, Secy.
[ADVT.-III/4/Exty./404/2025-26]
Note: The principal regulations were published in the Gazette of India, Extraordinary, Part III, Section 4,
vide notification No. CEA-TH-17/1/2021-TETD Division, dated the 23rd December, 2022.
Uploaded by Dte. of Printing at Government of India Press, Ring Road, Mayapuri, New Delhi-110064
and Published by the Controller of Publications, Delhi-110054.
GORAKHA NATH Digitally signed by GORAKHA
YADAVA
NATH YADAVA
Date: 2025.10.13 16:18:19 +05'30'