Atul Casting and Metal Works

08/06/2021

Greetings from M/s Atul Casting & Metal Works and M/s Grand Steel Works

New Delhi , India

Since 1964

[email protected]

Do contact us for best deals on -:
• GI Earthing Strips/Flats/Patti
• GI Earth Plates
• GI Earth Pipes
• GI Earth Rods
• GI Earth Wire
• Cast Iron Earthing Pipe
• Cast Iron Earthing Plate
• Cast Iron Earthing Cover
• Cast Iron Manhole Cover
• Cable Route Marker (DC, LT, AC, OFC, HT)
• Copper Bonded Rods (Imported , 17.2 mm Dia, 3 Meter, 254 Micron)
• Cable Trays

Do let us know about your current requirements in order to quote you with best of rates !

Greetings from M/s Atul Casting & Metal Works

28/12/2020

9.2.6 Structural Steelwork — The resistance to earth of steel frames or reinforced concrete buildings will vary considerably according to the type of soil and its moisture content, and the design of the stanchion bases. For this reason, it is essential
to measure the resistance to earth of any structural steetwork that it is employing and at frequent intervals thereafter.
NOT E — Special care is necessary where the construction includes prestressed concrete.
9.2.7 Reinforcement of Piles — At power stations
and large substations, it is often possible to secure
an effective earth-electrode by making use of the
reinforcement in concrete piles. The earth strap
should be bonded to a minimum of four piles and
all the piles between the bonds should be bonded
together. Each set of four piles should be connected to the mai ngearthi-strap of the substation.

We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals

14/12/2020

Cable Sheaths — Where an extensive underground cable system is available, the lead sheath and armour form a most effective earthelectrode. In the majority of cases, the resistance to earth of such a system is less than 1 Ω.A freshly installed jute or hessian served cable is insulated from earth, but the insulation resistance of the jute deteriorates according to the moisture content and nature of the soil. However, cable sheaths arc more commonly used to provide a metallic path
to the fault current returning to the neutral.


We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals

Cable Sheaths — Where an extensive undergrou

12/12/2020

For new installations, therefore, a public water pipe may not be used as a means of earthing. Metallic pipe systems of services other than water service (for example, for flammable liquids or
gases, heating systems, etc ) shall not be used as earth electrodes for protective purposes. Bonding of the water service with the exposed metalwork of the electrical installation (o n the consumers' side of any insulating insert) and any other extraneous metalwork to the installation earthing terminal is, however, permissible and indeed necessary in most circumstances subject to the provision of earthing facilities that are satisfactory before these bonding connections are made. For existing installations in which a water pipe is used as a sole earth electrode; an independent
means of earthing should be provided at the first practicable opportunity

We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals

For new installations, therefore, a public wa

11/12/2020

Strip or Conductor Electrodes — These have special advantages where high resistivity soil underlies shallow surface layers of low resistivity. The minimum cross-sectional area of strip electrodes shall be according to 12.1.1. If round conductors are used as earth electrodes, their cross sectional area shall not be less than the sizes recommended for strip electrodes.If several strip electrodes are required for connection in parallel in order to reduce the resistance, they may be installed in parallel lines or the may radiate from a point. In the former case, the resistance of two strips at a separation of 2.4 m is less than 65 percent of the individual resistance of cither of them.

We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals

Strip or Conductor Electrodes — These have sp

21/11/2020

Cruciform and star shaped sections are also available and are more rigid while being driven, but the apparent additional surface does not confer a noticeable advantage in current-carrying capacity or reduction of resistance. In circumstances where it is convenient to do so, the addition of radial strips will be advantageous. Such rods may be coupled together to give
longer lengths. Except in special conditions, a number of rods in parallel are to be preferred to a single long rod. Deeply riven rods are, howver, effective where the soil resistivity decreases with depth or where substrata of low resistivity
occur at depths greater than those with rods, for economic reasons, are normally driven. In such cases the decrease of resistance with depth of driving may be very considerable as is shown by the measurements plotted in Fig. 12 for a number of
sites; for curves A1 and A2, it was known from previously sunk boreholes that the soil down to a depth between 6 and 9 m consisted of ballast, sand and gravel below which occurred
London clay. The rapid reduction in resistance, when the electrodes penetrated the latter, was very marked. The mean resistivity up to a depth of 8 m in one case was 150Ωm; at 11 m the mean value for the whole depth was 20 Ω m moving to
the low resistivity of the clay stratum. Similarly for curve C, the transition from gravely soil to clayey at a depth of about 1·5 m was very effective.

We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals

Cruciform and star shaped sections are also a

18/11/2020

The curves of Fig. 11 are calculated from this
equation for electrodes of 13, 25 and 100 mm diameter respectively in a soil of l00Ω.m respectively.
Change of diameter has a relatively minor effect
and size of pipe is generally governed by resistance to bending or splitting. It is apparent that
the resistance diminishes rapidly with the first few
feet of driving, but less so at depths greater than
2 to 3 m in soil of uniform resistivity.
A number of rods or pipes may be connected
in parallel and the resistance is then practically
proportional to the reciprocal of the number employed so long as each is situated outside the resistance area of any other. In practice, this is satisfied by a mutual separation equal to the driven
depth. Little is to be gained by separation beyond
twice the driven depth. A substantial gain is
effected even at 2 m separation.
Pipes may be of cast iron of not less than 100 mm diameter, 2·5 to 3 m long and 13 mm thick. Such pipes cannot be driven satisfactorily and may, therefore, be more expensive to instal than plates for the same effective area. Alternatively, mild steel water-pipes of 38 to 50 mm diameter are sometimes employed. These can be driven but are less durable than copper rods.

We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals

The curves of Fig. 11 are calculated from thi

17/11/2020

For conventional sizes, the resistance is approximately inversely proportional to the linear dimensions, not the surface area, that is a 0·9 m × 0·9 m plate would have a resistance approximately 25 percent higher than a 1·2 × 1·2 m plate. The current loading capacity of a 1·2 m × 1·2 m plate
is of the order of 1 600 A for 2 s and 1 300 A for
3 s. Plate electrodes shall be buried such that its top edge is at a depth not less than 1 5 m 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. Where
the underlying stratum is solid, for example chalk or sandstone and near the surface, the top of the plate should be approximately level with the top of the solid stratum.

We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals

For conventional sizes, the resistance is app

10/11/2020

Suitable methods of jointing are a taper pin driven into a reamed hole and riveted over or a copper stud screwed into a tapped hole and riveted. Such joints should be protected by a heavy coat of bitumen. The connection between the earth plate and the disconnecting link should be set vertically and the depth of setting should be such as to ensure that the surrounding soil is always damp. The minimum cover should be 600 mm except that where the underlying stratum is solid,
for example, chalk or sandstone and near the surface, the top of the plate should be level with the top of the solid stratum. Sufficient solid stratum should be removed and replaced with fine soil or other suitable infill to ensure as low a resistance
as possible.
The use of coke breeze as an infill is not recommended as it may result in rapid corrosion not only of the electrode itself but also of cable sheaths, etc, to which it may be bonded.

We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals

06/11/2020

Plate electrodes shall be of the size at least 60 cm × 60 cm. Plates are generally of cast iron not less than 12 mm thick and preferably ribbed. The earth connection should be joined to the plate at not less than two separate points. Plate electrodes, when made of GI or steel, shall be not less than
6·3 mm in thickness. Plate electrodes of Cu shall be not less than 3·15 mm in thickness.

We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals

Plate electrodes shall be of the size at leas

05/11/2020

Where the resistance of a single plate is higher than the required value, two or more plates may be used in parallel and the total resistance is than inversely proportional to the number employed, provided that each plate is installed outside the resistance area of any other. This normally requires a separation of about 10 m but for sizes of plate
generally employed, a separation of 2 m is sufficient to ensure that the total resistance will not exceed the value obtained from the above formula by more than 20 percent. Even at the latter spacing, it is generally more economical to use two plates in parallel, each of a given size, than one of twice that size. The size employed is, therefore, normally not greater than 1·2 × 1·2 m.

We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals

Where the resistance of a single plate is hig

03/11/2020

Effect of Shape on Electrode Resistance

With all electrodes other than extended systems, the greater part of the fall in potential occurs in the soil within a few feet of the electrode surface, since it is here that the current density is highest. To obtain a low overall resistance the current density should be as low as possible in the medium adjacent to the electrode, which should be so designed as to cause the current density to decrease rapidly with distance from the electrode the other two, thus a pipe, rod or strip has a much
lower resistance than a plate of equal surface area.
The resistance is not, however, inversely proportional to the surface area of the electrode. This requirement is met by making the dimensions in one direction large compared with those

We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals

Effect of Shape on Electrode Resistance Wit