Answer / tejeswara rao paidi

The earthing requirements for a high tension (HT) 22 kV cable, lighting arrestor, disconnecting switch (D.O.), and air break (A.B.) switch are governed by specific standards and guidelines.

In India, the **IS: 3043 - 1987** standard provides the **Code of Practice for Earthing**¹. This standard outlines the general principles and detailed methodologies for designing and implementing earthing systems for electrical installations. It includes factors such as the resistance of the electrode, contact resistance between the electrode and the soil, and the resistance of the soil from the electrode surface outward¹.

For specific equipment like a 22 kV cable, the guidelines for use of underground cable systems and overhead conductor systems by the Central Electricity Authority could be referred².

However, the exact earthing requirements can vary based on factors such as the type of installation, soil resistivity, fault current levels, and safety considerations. Therefore, it's recommended to consult with a qualified electrical engineer or the relevant electrical authority for the specific earthing requirements for your installation.

Please note that this information is based on general guidelines and standards, and may not be applicable in all situations or jurisdictions. Always consult with a qualified professional or the relevant authorities for specific advice.

Source: Conversation with Bing, 28/1/2024
(1) Indian Standard: CODE OF PRACTICE FOR EARTHING - Law.Resource.Org. https://law.resource.org/pub/in/bis/S05/is.3043.1987.html.
(2) GUIDELINES FOR USE OF UNDER GROUND CABLE SYSTEM AND OVERHEAD CONDUCTOR .... https://cea.nic.in/wp-content/uploads/2020/04/b.pdf.
(3) MATERIAL SPECIFICATIONS CELL - महावितरण. https://www.mahadiscom.in/supplier/wp-content/uploads/2020/01/Metering-Cubicle-1122-kV33kV-29.08.2019-FINAL.pdf.
(4) TECHNICAL SPECIFICATION FOR XLPE POWER CABLE - महावितरण. https://www.mahadiscom.in/supplier/wp-content/uploads/2018/08/HTXLPESPEC2006.pdf.
(5) TECHNICAL SPECIFICATION FOR 33/132/220 KV H.T. XLPE POWER CABLE - OPTCL. https://optcl.co.in/writereaddata/Tender/150619110614E31-33-132-220KV_XLPE_CABLE_SPEC_12042019.pdf.
if any doubts regarding technicality refer the url mentioned

one hp 3phase motor what generate power factor

1 Answers  

---

what is the minimum insulation resistance for HT AND LT motor ?

3 Answers  

---

hello! can anyone explain to me how a 3 speeds table fan work? what are the factors that are controlling the speed of a normal table fan? Is it by varying the voltage or changing the magnetic field? would appreciate your reply :) thx in advance.

2 Answers  

---

What is partial discharge in power cable?

1 Answers  

---

what is entropy?

3 Answers   NTPC,

---

---

figure of phasor diagram of transformer when full load or no load ?

1 Answers   Swastik, TCS,

---

Will u plz give me simple diagram for tube light connection & also function of chock?

8 Answers   Bhushan Power Steel, Dalmia Group, Jindal, Practical Viva Questions, TCS, Windmoller,

---

if you are in a software company,then why do you want to come in a core company like sail, ntpc(where lots of trouble like tension but you have a good life in a it company) ?

0 Answers   Sail,

---

what does kirlosker deals with?

3 Answers  

---

In 11KV Double pole structure for each phase we are using Disc one Insulator. Why we are not using 2 r above insulators instead of one insulator?

4 Answers   Genus,

---

Why HRG and LRG used beside transformer, what is the purpose

3 Answers  

---

What is bushing?

4 Answers  

---