INDUSTRIAL TRAINING REPORT

ON
GPRA PROJECT OF CPWD
AT
(MOHAMMADPUR ,NEW DELHI)

submitted in the partial fulfillment of the requirements for

the award of the degree of

Bachelor of Technology
in
Electrical Engineering
by

MANISH DEVANDA
(Roll No. 202195)

Department of Electrical Engineering

School of Engineering and Technology
Central University of Haryana, Mahendergarh - 123031
(June, 2022)
 DECLARATION

I hereby declare that the industrial training report entitled “GPRA PROJECT OF
CPWD” submitted by me in partial fulfillment of the requirements for the award of
Bachelor of Technology in the Department of Electrical Engineering, School of
Engineering and Technology, Central University of Haryana. The work carried out by
me at “MOHAMMADPUR , NEW DELHI”. The report has not been submitted to any
other University or Institute for the award of any degree or diploma.

MANISH DEVANDA.
(Roll No. 202195)
 ACKNOWLEDGMENT

As Summer Training is one of the essential part in gaining the practical knowledge

and to get the award of degree of Bachelor of Technology. This report is prepared

during my training in Central Public Work Department.

I would like to thank and express my heartfelt gratitude to Mr. Subrata Barman
(EE&SM/RPED-I, CPWD) and Shrikant Vatsal (AE/ RPED-I, CPWD) for providing me
the guidance for successful outcome of training in the CPWD GPRA Project at
Mohammadpur,New Delhi

At last, I would also like to thank all the Engineers who worked so hard for making

the things very easy to understand in a better way, also for cooperation which they

provided.
 CERTIFICATE

This is to certify that the industrial training report entitled “GPRA PROJECT
CPWD” that is being submitted by MANISH DEVANDA, with Roll. No. 202195 in partial
fulfillment for the award of Bachelor of Technology in the Department of Electrical
Engineering, to the School of Engineering and Technology, Central University of
Haryana, Mahedergrah.

Dr. Rajesh Kumar Ddubey,

Head of the Department,
Department of Electrical Engineering,
School of Engineering and Technology,
Central University of Haryana, Mahendergarh.
 Contents

SI. No Page No

1. Introduction of CPWD

2. About The Project

3. Substation

4. Air Circuit Breaker Installation

5. Earthing Work

6. Meter room Setup

7. Wiring Work

8. DB/MCB Installation

9. Conduiting Work

9.1 Conduit drawing

10. Standards of CPWD

10.1 Conduit standards

10.2 Earthing standards

10.3 Symbols standards

Nomenclature
(Arial, Size 12)
Abbreviations
(Arial, Size 12)
 INTRODUCTION OF CPWD

The Central Public Works Department of India (Hindi: लोक निर्माण विभाग),commonly referred
to as the CPWD, is a premier Central Government authority in charge of public sector
works. The Central Public Works Department, under the Ministry of Urban Development
now MOHUA (Ministry of Housing and Urban Affairs), deals with buildings, roads,
bridges, flyovers, complicated structures like stadiums, auditoriums, laboratories,
bunkers, border fencing, border roads (hill roads), etc. CPWD came into existence in
July 1854 when Lord Dalhousie established a central agency for execution of public
works and set up Ajmer Provincial Division. It has now grown into a comprehensive
construction management department, which provides services from project conception
to completion, and maintenance management.

It is headed by the Director General (DG) who is also the Principal Technical Advisor to
the Government of India. The regions and sub-regions are headed by Special DGs and
Additional DGs respectively, while the zones in all state capitals (except a few) are
headed by Chief Engineers. Nowadays, a new post of Chief Project Manager (CPM)
has been created to head major prestigious projects of CPWD. CPMs are equivalent to
the rank of Chief Engineers in CPWD. With country wide presence, the strength of
CPWD is its ability to undertake construction of Complex Projects even in difficult
terrains and maintenance in post construction stage.

It is the prime engineering department of Government of union of India and its

specifications and manuals are followed by local public works departments and
engineering wing of other departments.
 ABOUT THE PROJECT

Redevelopment of General Pool Residential Accommodation (GPRA) at

Mohammadpur, New Delhi

CENTRAL PUBLIC WORKS DEPARTMENT (CPWD) has floated a tender for

Redevelopment of Gpra General Pool Residential Accommodation at Mohammadpur,
New Delhi. Sh Construction and Providing Multilevel Electro Mechanical Car Parking
System in New Upcoming Residential Gpra.... The project location is New Delhi, Delhi
(NCT),India. The reference number is 03/CE cum ED/RP/NIT/2020-21 and it is closing
on 28 Oct 2021.

Other Information

Notice Type : Tender

TOT Ref.No.: 58596881

Document Ref. No. : 03/CE cum

ED/RP/NIT/2020-21

Competition : NCB

Financier : Self Financed

Purchaser Ownership :

Tender Value : ₹ 29,00,00,000

EMD : Refer Document

Purchaser's Detail

Purchaser : CENTRAL PUBLIC WORKS DEPARTMENT (CPWD)

Address: A-Wing, Room No.- 101

Nirman Bhawan

City: New Delhi

District: Central Delhi

State: Delhi (NCT)

Pin: 110108

Tel/Fax: +91-11-23062556,23061317,23061884
Country: India

Email: cpwd_dgw@nic.in

Website: http://cpwd.gov.in
 SUBSTATION

A substation is a part of an electrical generation, transmission, and distribution system.

Substations transform voltage from high to low, or the reverse, or perform any of several
other important functions. Between the generating station and consumer, electric power
may flow through several substations at different voltage levels. A substation may
include transformers to change voltage levels between high transmission voltages and
lower distribution voltages, or at the interconnection of two different transmission
voltages.
Substations may be owned and operated by an electrical utility, or may be owned by a
large industrial or commercial customer. Generally substations are unattended, relying
on SCADA for remote supervision and control.
The word substation comes from the days before the distribution system became
a grid. As central generation stations became larger, smaller generating plants were
converted to distribution stations, receiving their energy supply from a larger plant
instead of using their own generators. The first substations were connected to only
one power station, where the generators were housed, and were subsidiaries of that
power station.

Components of substation

Transformers (1000kv)
Used to convert high voltage to low voltage (Step-Down)

HT/LC Connection panels

 AIR CIRCUIT BREAKER INSTALLATION

Air circuit breaker is a circuit breaker for the purpose of protecting low voltage
circuit, mainly for energizing and cutting off high current. It is used as the master of
a factory and building, and as a main circuit breaker of a ship, and it is possible to
attach various accessories according to the purpose

The air brake principle of the air breaker circuit arc is used in DC circuits and AC circuits
up to 12KV. The air circuit breakers have high resistance power that helps in increasing
the resistance of the arc by splitting, cooling and lengthening
 EARTHING WORK

Earthing is defined as “the process in which the instantaneous discharge of the

electrical energy takes place by transferring charges directly to the earth through low
resistance wire.” Low resistance earthing wire is chosen to provide the least resistance
path for leakage of fault current.

Body Earthing

Leakage Earthing for Transformer

Both type of Earthing (Plate and Road ) are used on the Site
EARTING OF TRANSFORMER

1. PIT DEPTH - 10FT.

2. 50kg boronite and macronite powder are used instead of coal and salt mixture.

3. Body and Leakage earthing are done separately.

Earthing of wiring work

1. 6sq mm (cu) wires are used in submain

2. 1.5 and 4 sq mm (cu) wires used for point earthing

 METER ROOM SETUP

Room where all the meters of flats are installed

> Every tower has its own meter room

>Earthing of every meter panel separately

>condutes are separated out for the flats

 WIRNG WORK

What is the process of wiring?

Electrical Wiring is a process of connecting cables and wires to the related devices
such as fuse, switches, sockets, lights, fans etc to the main distribution board is a
specific structure to the utility pole for continues power supply

How wiring works in a house?

Electricity travels from the service panel to home appliances through the hot
conductor, and returns the current to the main service panel through the neutral
conductor. A third or “grounding” wire is also connected to all outlets and metal boxes
in your home.

Three types of wire used are :

 live wire ( Red colour)
 neutral wire(Black colour)
 earth wire (Green colour)

> The size of Main Scrurfuig conductor (benreen Forth Electrode <and the main
earthing
> Terminal / E<rth bus, cs the case McCray be) should be as per contract (clause
8.2.2.01 specializations).

> Check the provision and terminal rations of Earth Bus. (Clause 8.4.3 of
Specializations).

> Check size of loop earthing wire Aluminium 4 sq.mm. (2'24 mm dia)/coPPer 2 mm

> dicr (minimum) Iron DB. AII 3d pins of sockets, all metallic switch boxes and lcs

> Regulators (metal body) should be connected to earth using this.

> No joints in this protective conductor in through runs: And no bunching of connections
crt terminations should be allowed.

> 6sq.mm wires in power sockets(ac)

> 4sq.mm wires in power sockets

> 1.5 sq.mm wires in POINT (light and fans)

DRAWINGS FOR CIRCUIT AND POINT WIRING

 DB AND MCB INSTALLATION

BCH Distribution boxes are elegantly designed for safe power distribution in

industrial, commercial and residential segments. Distribution boxes are available in
wide range and equipped with insulated neutral links, copper bus bar & earth link.
> NO looping above 16amp.

> different mcbs for power sockets

> Rccs to be installed on each db.

> Earthing should be done common

>Neutral should be common

 CONDUIT WORK

1. R , Y & B indicates phases.

2. The number written near the switch board and power points indicates circuit number.
For detail of circuits refer distribution board charts.

3. The size of wires from switch board to different light and fan points shall be 1.5
sq.m.m

4. For secondary power point the circuit wire shall be looped from first power point by
2X4 sq.m.m

5. The size of submain conduit from electrical shaft to each shop DB shall be 25/32 θ(as
mention in DB schedule).

6. The conduits used for wiring shall be as follows:

A. Ms conduit

B. The minimum conduit size for Electrical : 20 mm dia.

C. The minimum conduit size for Fire Alarm : 25 mm dia.

7. RG -6 T.V. coaxial wire shall be laid from L.V. shaft / JB to each T.V. outlet
separately.

8. 2 pair of Tel. /shall be laid from L.V. shaft / JB to tel. Point.

9. Flexible conduit shall be used at expansion joints for electrical & L.V. wires.

10. Parking / Corridor / Staircase lights shall be directly controlled from MCB - DB
through 2x1.5 sq.m.m wires as shown in drawings.

11. No two dissimilar phase circuit / wire shall run together through same conduit.

12. Light and power circuit shall be drawn through s conduit.

13. Wiring shall be carried out as per colour code I.e. R, Y, B phases and black- neutral
and green- earth.
14. The position mentioned in legend is bottom of switch board/ outlets.

15. The openings inside Electrical, LV & Fire shaft should be sealed at each floor.

16. Conduit drop should be precisely co-ordinated with RCC as per dimensions given in
the drawing.

17. In case of any discrepancy in the drawing, the same may be brought to the notice of
electrical consultant for approval before execution.

18. The Earth Continuity wire has t be laid for all electrical outlets / sockets / light / fan
points. Size of earth wire shall be as follows:-

Phase wire 2x1. 2x4 2x6 2x10 2x16 4x6 4x10 4x16
(sq.m.m 5

Earth wire 1x1. 1x4 1x6 1x6 1x6 2x6 2x6 2x6
(sq.m.m) 5

CONDUIT DRAWING
CPWD STANDARDS
1.CONDUIT STANDARDS
2.EARTHING STANDARDS

3. SYMBOLS STANDARDS
 BIBLIOGRAPHY

1. WIKIPEDIA

2. ACIL.COM

3. CPWD NORMS

4. ACIL ENGINEERS

5. GOOGLE

6. SITE ENGINEERS
 SPECIAL THANKS

AT LAST I WANT TO THANK SOME SPECIAL PERSON WHO HELPED ME DURING

THIS INTERNSHIP PERIOD:

SUBRATA BARMAN (EE & SM/CPWD)

SHRIKANT VATSAL (AECE/CPWD)

SANDEEP CHOURISYA (SITE ENGINEER/ACIL)