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IS 3043 PDF

Sunday, May 26, 2019


Bhartṛhari—Nītiśatakam. “Knowledge is such a treasure which cannot be stolen” . IS (): Code of practice for earthing [ETD Electrical Installation]. ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है” Bhartṛhari— Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS: IS pdf - Download as PDF File .pdf), Text File .txt) or read online.


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Abstract of IS: Code for Earthing Practice. All medium voltage equipment shall be earthed by two separate and distinct connections with earth In the case of. PDF: ISBN X SS No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise. COMPLIANCE IF IS: IS. Description from Indian standards. Our comments. The resistance to earth of a given electrode depends upon the.

In all cases, the connections have to be mechanically strong. The cross-sectional area of every protective conductor which does not form part of the supply cable or cable enclosure shall be in any case, not less than a 2. Joints of protective conductors shall be accessible for inspection and testing except m compoundfilled or encapsulated joints.

Earthing Materials

No switching device shall is inserted in the protective conductor, but joints which can be disconnected for test purposes by use of a tool may be provided.

An auxiliary earth electrode shall be provided electrically' independent of all other earthed metal, for example, constructional metalwork, pipes, or metal-sheathed cables.

This requirement i.

The earthing conductor leading to the auxiliary earth electrode shall be isolated to avoid contact with the protective conductor or any of the parts connected thereto or extraneous conductive parts which are, or may be, in contact with them. In TN systems, for cables in fixed installations having a cross sectional area not less than 10mm2 for copper and 16mm2 for aluminum, a single conductor may serve both as protective conductor and neutral conductor, provided that the part of the installation concerned is not protected by a residual current-operated device.

However, the minimum cross sectional area of a PEN conductor may be 4mm2, provided that the cable is of a concentric type conforming to Indian Standards and that duplicate continuity connections exist at all joints and terminations in the run of the concentric conductors.

When the source of energy is privately owned, there should be no metallic connection with the General public supply unless there has been consultation with the electricity authority concerned. It should be emphasized that an installation together with its source of energy may not consist entirely of one particular type of system. In such cases, each part of that installation may be required to be treated separately without detriment to other parts of the same installation.

The neutral points of each separate electricity system which has to be earthed at the power station or substation. Wood coal powder and salt are in same quantity. Minimum 1 Resistance should be available at a distance of 15mt. IR value of Earth resistance is less than Earthing resistance of earthing rod is changed from 0.

Distance between two earthing pit is 2 X Length of earthing electrode. If ground resistance is less than plate earthing if hard rock than Pipe earthing shall be used. Resistance between two earthing pit is negligible. Top edge is at a depth not less than 15m from the surface of the ground.

However, the depth at which plates are set should be such as to ensure that the surrounding soil is always damp. Pipes may be of cast iron of not less than mm diameter, 2. Such pipes cannot be driven satisfactorily and may, therefore, be more expensive to install than plates for the same effective Area.

Earthing Details as is-3043

Water pipes shall not be use as consumer earth electrodes. Under fault conditions, the earth electrode is raised to a potential with respect to the general mass of the earth that can be calculated from the prospective fault current and the earth resistance of the electrode.

The results in the existence of voltage. In the soil around the electrode, that may be injurious to telephone and pilot cables, whose cores are substantially at earth potentional, owing to the voltage to which the sheaths of such cables are raised.

The voltage gradient at the surface of the ground may also constitute a danger to life, especially where cattle are concerned. The former risk arises mainly in connection with large elect rode systems as at power stations and substation. Earth electrodes, other than the.

Used for the earthing of the fence itself, should not be installed In proximity to a metal fence to avoid the possibility of the fence becoming live and thus. Dangerous at points remote from the substation. The materials used for making connections have to be compatible with the earth rod and the copper earthing conductor so that galvanic corrosion is minimized.

In all cases, the connections have to be mechanically strong. Joints of protective conductors shall be accessible for inspection and testing except m compound-filled or encapsulated joints. No switching device. This requirement i. The earthing conductor leading to the auxiliary earth electrode shall be isolated to avoid contact with the protective conductor or any of the parts connected thereto or extraneous conductive parts which are, or may be, in contact with them.

However, the minimum cross sectional area of a PEN conductor may be 4 mm2, provided that the cable is of a concentric type conforming to Indian Standards and that duplicate continuity connections exist at all joints and terminations in the run of the concentric conductors.

When the source of energy is privately owned, there should be no metallic connection with the General public supply unless there has been consultation with the electricity authority concerned.

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It should be emphasized that an installation together with its source of energy may not consist entirely of one particular type of system. In such cases, each part of that installation may be required to be treated separately without detriment to other parts of the same installation. The neutral points of each separate electricity system which has to be earthed at the power station or substation. Plate electrodes of Cu shall be not less than 3.

Plate electrodes shall be buried ouch that ii. Top edge is at a depth not less than 15m from the surface of the ground. However, the depth at which plates are set should be such as to ensure that the surrounding soil is always damp. Pipes may be of cast iron of not less than mm diameter, 2. Such pipes cannot be driven satisfactorily and may, therefore, be more expensive to install than plates for the same effective Area.

Water pipes shall not be use as consumer earth electrodes. Under fault conditions, the earth electrode is raised to a potential with respect to the general mass of the earth that can be calculated from the prospective fault current and the earth resistance of the electrode. The results in the existence of voltage. In the soil around the electrode, that may be injurious to telephone and pilot cables, whose cores are substantially at earth potentional, owing to the voltage to which the sheaths of such cables are raised.

The voltage gradient at the surface of the ground may also constitute a danger to life, especially where cattle are concerned. The former risk arises mainly in connection with large elect rode systems as at power stations and substation. Earth electrodes, other than the. Used for the earthing of the fence itself, should not be installed In proximity to a metal fence to avoid the possibility of the fence becoming live and thus.

Dangerous at points remote from the substation. The materials used for making connections have to be compatible with the earth rod and the copper earthing conductor so that galvanic corrosion is minimized.

In all cases, the connections have to be mechanically strong. Joints of protective conductors shall be accessible for inspection and testing except m compound-filled or encapsulated joints.

No switching device.

This requirement i. The earthing conductor leading to the auxiliary earth electrode shall be isolated to avoid contact with the protective conductor or any of the parts connected thereto or extraneous conductive parts which are, or may be, in contact with them.

However, the minimum cross sectional area of a PEN conductor may be 4 mm2, provided that the cable is of a concentric type conforming to Indian Standards and that duplicate continuity connections exist at all joints and terminations in the run of the concentric conductors. When the source of energy is privately owned, there should be no metallic connection with the General public supply unless there has been consultation with the electricity authority concerned.

It should be emphasized that an installation together with its source of energy may not consist entirely of one particular type of system.

In such cases, each part of that installation may be required to be treated separately without detriment to other parts of the same installation. The neutral points of each separate electricity system which has to be earthed at the power station or substation.

Wood coal powder and salt are in same quantity. Size of GI Strip: Earthing resistance of earthing rod is changed from 0. Distance between two earthing pit is 2 X Length of earthing electrode. If ground resistance is less than plate earthing if hard rock than Pipe earthing shall be used.

Resistance between two earthing pit is negligible. Earthing of lighting protection should not mix with power system earthing.

Why Earthing is important

Plate Earthing Electrode for copper shall be XX3. Pipe Earthing Electrode. Earthing electrode shall consist of a GI pipe class B of approved make , not less than 40 mm dia. CL pipe electrode shall be cut tapered at the bottom and provided with holes of 12 mm dia. The electrode shall be buried vertically in the ground as far as practicable below permanent moisture level, but in any case not less than 3 meters below ground level.

The electrode shall be in one piece and no joints shall be allowed in the electrode.

Size of Excavation: Size of 1 meter diameter and 3 meter length shall be excavated after depth of 3 meter the size of excavation shall be XXmm depth. At bottom mm layer of Salt and charcoal power shall be installed than Plate shall be installed.

Alternate layer of mm of Salt and charcoal power shall be used up to 2.

Min kg of charcoal power and kg of salt shall be used for each earthing pit. They are generally located on public footpaths abutting the building line or along the kerb line of footpaths.

This standard covers distribution pillars for voltages not exceeding 1 V ac or 1 V dc, the current rating in each outgoing or incoming circuit not exceeding A, for use on ac or dc systems, in outdoor conditions. Rating of Individual Circuits: The rated current of the outgoing or incoming circuits shall be as follows: NOTE 1 — These ratings correspond to those of fuse-bases. NOTE 2 — All the incoming circuits of the same distribution pillar shall have the same current rating and similarly all the outgoing circuits of the same distribution pillar shall have the same current rating.

Rated Diversity Factor: The rated diversity factor of the distribution pillar having several incoming and outgoing circuits is the ratio of the maximum sum at any one time, of the assumed circuits of all the circuits involved, to the sum of the rated currents of all the circuits of the distribution pillar. It shall be in all respect suitable for outdoor installations.

It shall be made from a suitable material to withstand rough usage and weather. If fabricated out of MS sheets the thickness of the sheet shall be at least 3. Distribution pillars shall have a set of double hinged doors at the front. Similar doors shall be provided at the back also; if specified.

The doors shall be so fitted as to provide the interior with maximum protection from atmospheric conditions. In addition the hinged design shall permit doors being completely removed when necessary. The top of the pillar shall be fitted with a sloping canopy design of which shall be such that rain water shall not accumulate on the top. If required, an apron two if there are doors at the rear also shall be provided below the door level of the pillar. They shall be easily removable.

The apron shall be made from a suitable material to withstand rough usage. If made from sheet steel, the thickness of the sheet shall be at least 3. Pillar Lighting: A bayonet lamp holder complying with IS: Unless otherwise agreed between the manufacturers and user, on TPN fuse boards, terminals for the neutral conductor shall allow the connection of aluminum conductors having a current carrying capacity: Bus-bar Suitable barriers shall be provided between bus-bars.

Earthing The metal casing of the distribution pillar shall be provided with two separate earthing terminals and the framework shall be metallically connected with the casing.

Share this:This protection is. In addition to the earthing.

An RCD should be chosen having the lowest suitable operating current. The choice of protective device used to give disconnection is influenced by the type of system of which the installation is part. The neutral earth electrode at the supply transformer is an importaut part of the fault loop but Earthing leads should.

They are:

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