CAMTECH RECOMMENDATIONS ON PROCEDURE ORDER FOR … · CAMTECH RECOMMENDATIONS ON PROCEDURE ORDER FOR COMPOSITE TENDER WORK FOR BUILDING WIRING Maharajpur, GWALIOR - 474 005 dsoy dk;Zky;hu

Hkkjr ljdkj GOVERNMENT OF INDIA

jsy ea=ky; MINISTRY OF RAILWAYS

CAMTECH RECOMMENDATIONS

ON

PROCEDURE ORDER FOR COMPOSITE TENDER

WORK FOR BUILDING WIRING

Maharajpur, GWALIOR - 474 005

dsoy dk;Zky;hu mi;ksx gsrq

(For Official Use Only)

CAMTECH/ E/ 2017-18/EP-2/Wiring/ 1.0

MAY, 2017

END USER: ELECTRICAL GENERAL SERVICE AND CONSTRUCTION OFFICIALS

CAMTECH RECOMMENDATIONS

ON

PROCEDURE ORDER FOR COMPOSITE

TENDER WORK FOR BUILDING WIRING

QUALITY POLICY

“To develop safe, modern and cost

effective Railway Technology

complying with Statutory and

Regulatory requirements, through

excellence in Research, Designs and

Standards and Continual

improvements in Quality

Management System to cater to

growing demand of passenger and

freight traffic on the railways”.

FOREWORD

The nature of work is of composite type for the construction of buildings

and provision of other facilities including electrical. Many problems are being

faced by executing agencies due to lack of co-ordination between the various

department.

To ensure proper co-ordination, CAMTECH has prepared this report on

"Recommendation on procedure order for composite tender work for building

wiring".

This handbook also comprises general instructions and guidelines for

inspection and testing apart from recommendations for composite tenders. This

handbook will be useful for streamlining the joint procedure orders among

civil, electrical and other departments as well as will be useful for site officials.

CAMTECH Gwalior A.R. Tupe

Date: 25.05.2017 Executive Director

PREFACE

This handbook on “Recommendation on procedure order for composite

tender work for building wiring" is prepared with the objective to unify and

standardize the joint procedure orders being used by various Railways.

In course of preparation of this report, some important guidelines for

work execution and inspection testing are also included which are referred

from Indian Standards related to subject matter.

CAMTECH has also recommended a layout for standardizing the

sequence of switches for light, fan and sockets. By adopting this standard

layout, it will be convenient for user to approach the light switch first while

entering in the room/premises.

It is clarified that this report/ handbook does not supersede any existing

provisions laid down by Indian Standards, RDSO or Railway Board/Zonal

Railways. This handbook is for guidance only and it is not a statutory

document.

I am sincerely thankful to ECM directorate of RDSO & all field

personnel who helped us in preparing this handbook. Technological up-

gradation & learning is a continuous process. Please feel free to write us for

any addition/ modification in this handbook.

CAMTECH, Gwalior Peeyoosh Gupta

Date: 24.05.2017 Director Electrical

CONTENTS

Sr.No. Description Page No. Foreword iii

Preface iv

Contents v

Correction Slip vi 1. GUIDELINES FOR INVITING COMPOSITE TENDERS 01

2. GUIDELINES FOR WORK PROCEDURE FOR COMPOSITE TENDERS 03

2.1 Time Schedule 03

3. GENERAL REQUIREMENT 05

3.1 General 05

3.2 Installation 05

3.3 Energy meters, main switches and cut-outs 05

3.4 Isolation and Protection 06

3.5 Earthing 06

3.6 Lighting 06

3.7 Socket-outlets 07

3.8 Ceiling Fans 08

4. INSPECTION AND TESTING 08

4.1 General 08

4.2 Visual Inspection 08

4.3 Insulation Resistance 08

APPENDIX-A 09

List of Indian Standards

Reference 10

ISSUE OF CORRECTION SLIPS

The correction slips to be issued in future for this handbook will be numbered as follows :

CAMTECH/E/2017-18/EP-2-Wiring/C.S. # XX date---------

Where “XX” is the serial number of the concerned correction slip (starting from 01

onwards).

CORRECTION SLIPS ISSUED

Sr. No. Date of issue Page no. and Item no. modified

Remarks

CAMECH/E/2017-18/EP-2-Wiring/1.0 1

CAMTECH Recommendation on Procedure Order for Composite Tender Work for Building Wiring May, 2017

INTRODUCTION

Due to difficulties being experienced in work of composite nature where Civil

Engineering and Electrical works both are involved, such as service building/staff quarter

works, only composite tenders shall be invited to ensure better co-ordination of civil &

electrical works during construction of buildings/quarters.

1. GUIDELINES FOR INVITING COMPOSITE TENDERS

The following guidelines should be followed on inviting composite tenders:

1.1 Executing agencies fixed by both PHODs of civil and electrical department for

carrying out sanctioned composite works.

1.2 For construction of all buildings/quarters, composite tenders shall be invited by the

civil engineering department including civil and electrical works where civil

engineering cost forms the major percentage.

1.3 The main executing agencies calling the tenders for composite work, shall ask also

other departments like telecom department etc. for their work details in advance if

applicable.

1.4 The civil engineering department shall provide a plan for the building works to the

electrical department in advance for them to submit necessary electrical details.

1.5 The duties of the electrical department in respect to such building works where civil

engineering cost forms the major percentage are given below:

Following documents/details shall be provided by electrical department –

i. Technical specifications, drawing and wiring plan.

ii. Special conditions.

iii. Schedule of items with technical specification alongwith quantities.

iv. LAR of the items with supporting documents for the electrical portion in the

composite tender.

v. List of approved makes to be specified in the tender. The list of approved

makes for different items shall be reviewed periodically by competent

authority.

vi. Electrical department shall nominate electrical SSE/JE & officer responsible

for the work.

vii. Such composite tender shall have the tender schedule in two parts.

Part-I will be civil engineering portion and

part-II will be the electrical engineering portion.



1.6 The schedules should include all necessary items like air conditioning, fan hooks,

duct/ conduit for cables, wiring, road/floor crossing, telephone/ projector/ cable/ tv

connection etc. to facilitate expeditious commissioning of the building.

1.7 The tenderer shall be evaluated on total offer i.e. combined offer of part I & II. For

evaluation of the tender, technical and financial criteria shall be applied based on the

total cost of work i.e. including part I & II.

1.8 The contractor himself shall have valid electrical license or shall have a prior joint

venture (JV) with the sub-contractor having valid license for carrying out electrical

works. The details of which shall be furnished in tender by the main tenderer.

1.9 The tender committee shall have invariably an officer of electrical department as its

tender committee member. In case where the tender committee consists of only two

members, the 3rd member from electrical department should be co-opted.

1.10 The execution of electrical works shall be under the supervision of electrical

department and the measurement for the same shall be made separately through their

own measurement book.

1.11 The final payment shall be released by engineering department only after receiving

NOC from the electrical department for satisfactory completion of part-II works. The

final authority for any issue related to electrical work shall be controlling officer of

Electrical department.

1.12 For electrical works, which have a small element of civil engineering works, the

same procedure shall be followed and the composite tender for the work shall be

invited by the electrical department.

1.13 If an architect consultant is appointed, the scope consultancy should also include lay-

out of conduit, electrical points and fixtures.

1.14 The officer calling the tender from civil/electrical who controls the major portion of

contract shall be fully responsible for the progress of the civil as well as electrical

works. He shall extend all helps to other portion of contract.

1.15 After awarding of work, civil Engineering department shall provide a copy of LOA

to the electrical department.

1.16 Civil engineering department will inform to electrical department for the date of

starting of casting of roof work, plastering of walls etc. where ever electrical work

like conduit, duct, etc. is involved.

1.17 Before starting wiring and installation of electrical fitting and accessories,

information shall be given in writing by the controlling department / contractor to

other department.

The above procedure order (duly modifying to include local conditions if any)

may be jointly signed by PCE and CEE of Zonal Railways.



2. GUIDELINES FOR WORK PROCEDURE FOR COMPOSITE TENDERS

2.1 Time Schedule

i. Electrical installation in a new building should normally begin immediately on the

completion of the main structural building work.

ii. For concealed conduit wiring (except roof/ceiling), the work should start before

finishing work like plastering etc. has begun.

iii. Electrical wiring is to be concealed within the structures, the necessary fan hooks,

conduits should be positioned during the shuttering is in place and before the

concrete is poured, provision being made to protect conduits from damage.

iv. Electrical department will ensure for laying of PVC conduit of nominal size 25 mm

(outside dia 25 mm /inside 21.4 mm) or higher, medium grade confirming to IS:

9537-1983 Pt-3 or latest) with earth wire at the time of casting roof for provision of

electrical fittings such as fans/lights as per drawing.

Fig.1: Conduit layout at the time of casting roof for provision of electrical fittings

Fig.2: Ceiling view from inside room showing fan hook and junction boxes



v. Electrical department will ensure for proper provision of PVC conduits with earth

wire and switch boards etc. on wall before plastering.

vi. Provision for opening for air conditioners, geyser fixing rods etc. at proper place

shall be ensured before plastering.

vii. Conduit fittings and accessories shall be as per IS: 3419-1988.

Fig.3: Cutting of grooves should be done

before plastering for conduits

and boxes

Fig.4: Fitting of conduits and boxes to

be completed before plastering

rore

Fig.5: Earth wire running with

conduit and connect to box

Earth wire

Fig.6: Conduit covered with mesh

and cemented



3.0 GENERAL REQUIREMENT

3.1 General

All fittings, accessories and appliances shall conform to the relevant Indian Standards

wherever available. A list of Indian Standards applicable for the purpose is given in

Appendix A.

3.2 Installation

i. The system should provide ease of access to fittings for maintenance and repair and

for any possible modification to the system.

ii. Switch boards for light & fan should be on the adjacent wall on which door open.

iii. After completion of plaster work wiring shall be done.

iv. Wiring work along with box/board for cable connection to TV, net connection etc.

should be in separate conduit and connection point shall be at 1.5 to 2 feet of height.

v. Switch boards should be flushed in the wall and should not protrude out.

vi. Window AC to be fitted 2 to 3 feet above the floor level where ever applicable.

vii. Provision of door closer, sun protection film on glass window & sealing of all the

opening in case AC room.

3.3 Energy meters, main switches and cut-outs

i. It is recommended to have two distinct circuits, one for light and fans and the other for

high wattage (power) appliances.

ii. Energy meters shall be installed at such a place which is readily accessible to both the

occupant of the building and the authorized representative of the supply authority.

iii. Energy meters should be installed at a height where it is convenient to note the meter

reading, it should preferably not be installed below 1 meter from the ground.

Fig.7: Conduit and box for telephone and TV cable



3.4 Isolation and Protection

A. PROTECTION

1) Means for isolating the supply to the building shall be provided immediately after

the energy meter and near to the point of commencement of supply.

2) Main Incoming circuit should be provided with 300 mA sensitive ELCB, if

individual earth is not available for the building or there is possibility of earth value

to go beyond 80 Ω during summer, ELCB of 30 mA (instead at 300mA) should be

used. Additional 30 mA sensitive ELCB should be provided for circuit feeding to

bathroom & kitchen.

3) Each circuit must include protective conductor that should connect for earthing pin

in each socket outlet & earthing terminal other equipment to the main earthing

4) The main switch controlling the supply to the building should be readily accessible

to the occupant.

5) All switches shall be installed on the live lines only and never on the neutral.

B. SUBDIVISION

Subdivision of circuits will be based on number of utilization categories :-

1) One independent circuit should be provided for appliance such as air conditioner,

water heater, washing machine etc.

2) No individual light & fan circuit should supply more than 10 points of lights, fans

and 5A socket outlets. (IS 4648-1968 item no. 7.2 page no. 9)

3) At least one circuit for socket outlet of 5/15 Amp (power point socket) each should

be provided.

3.5 Earthing

i. Means shall be provided for proper earthing of all apparatus and appliances in

accordance with IS: 3043-1987 (Code of practice for earthing).

ii. An earthing conductor shall be installed alongwith circuit conductors.

iii. The earthing conductor may be un-insulated but where it is provided with an

insulated covering, the covering shall be finished to show a green colour. (IS 4648-

1968 item no. 6.2 page no. 9)

3.6 Lighting

i. A switch shall be provided adjacent to normal entrance to any area for controlling the

general lighting in that area.

ii. A switch shall be provided for control of every lighting fitting or a group of lighting

fittings.

iii. The switches should be fixed on a usable wall space and should not be obstructed by

a door or window in its fully open position.

iv. Switches may be installed at any height up to 1.3 meter above the floor level.

v. Normally the light switches shall be first then fan switches followed by switch &

sockets. (Refer figure no. 8).



vi. In bed rooms it is recommended that some lighting, laptop/ mobile charging point to

be controlled from the bed location.LAP TOP /MOBILE charging point should also

be provided near the bed.

vii. Waterproof lighting fittings should be used for outdoor lighting.

3.7 Socket-outlets

i. All plugs and socket-outlets shall be of 5pin type, the appropriate pin of the socket

being connected permanently to the earthing system.

ii. All socket-outlets shall be controlled by individual switches which shall be located

immediately adjacent to it.

iii. The switch controlling the socket outlet shall be on the live side of the line.

iv. For 5A socket-outlets, if desired, be installed at a height of 130 cm above the floor

level.

v. In situations where a socket-outlet is accessible to children, it is recommended to use

shuttered or interlocked socket-outlets.

vi. Socket-outlets shall be installed either 25 cm or 130 cm above the floor as desired.

vii. No socket-outlets shall be provided in the bathroom at a height less than 130 cm.

Wall End

towards gate s

R

L L L F F F

R R

SWITCH BOARD



3.8 Ceiling Fans

i. All ceiling fans shall be installed in accordance with Appendix 'C' item no. C.8.1 of

IS:732-1989.

ii. Ceiling fans including their suspension shall conform to IS : 374-1979.

i. Control of ceiling fan shall be through its own regulator as well as a switch in series.

ii. Ceiling fans shall be suspended from hooks or shackles with insulators between hooks

and suspension rods.

iii. Unless otherwise specified, all ceiling fans shall be hung not less than 2.75 meter

above the floor.

iv. Unless otherwise specified, the clearance between the bottom most point of the ceiling

fan and the floor shall be not less than 2.4 meter.

v. The minimum clearance between the ceiling and the plane of the blades shall be not

less than 300 mm.

4.0 INSPECTION AND TESTING

4.1 General

Every installation shall, on completion and before being energized, be inspected and

tested as far as practicable. (IS 732-1989 item no. 12.1.1)The methods of test shall be such

that no danger to persons or property or damage to equipment can occur even if the circuit

tested is defective.

4.2 Visual Inspection

A visual inspection shall be made to verify that the installed electrical equipment are

in compliance with the schedule of work, correctly erected, and not visibly damaged so as to

impair safety.

4.3 Insulation Resistance

Insulation resistance tests shall be made before the installation is permanently

connected to the supply.

For this test large installations may be divided into groups of outlets, each containing

not less than 50 outlets. For the purposes of this test the term „outlet‟ includes every point

and every switch except that a socket outlet, appliance or luminaire incorporating a switch is

regarded as one outlet.

The test voltage for insulation resistance measurement shall be:

for extra low voltage circuits up to 250 - 500 V

for 250-500 V circuits - 1 000 v

for circuits above 500 V - 2.5 kV



APPENDIX-A

LIST OF INDIAN STANDARDS

S.No. IS No. Title

1. 732-1989 (Third revision)

(Reaffirmed 2005) Code of practice for electrical wiring installations

2. IS: 4648- 1968

(Reaffirmed 1997) Guide for Electrical layout in residential buildings

3. IS : 3043 - 1987 (First Revision)

(Reaffirmed 2006) Code of practice for earthing

4. IS : 3419 - 1989 (second revision) Specification for fittings for rigid non-metallic

conduits

5. IS:9537 Pt-3- 1983 Conduits for electrical installations

Part 3- Rigid plain conduits of insulating materials

6. IS:374-1979 (third revision) Electric ceiling type fans and regulators

7. IS:1293-2005

Plugs and socket-outlets of rated voltage up to and

including 250 volts and rated current up to and

including 16 amperes.

8. IS:2082-1993 (fourth revision)

(Reaffirmed 2004) Stationary Storage type electric water heaters

9. IS:3646 -1992 (First Revision )

(Reaffirmed 2004)

Code of practice for interior illumination

Part 1 - General requirements and recommendations

for working interiors

10. IS:3854-1997 (Second Revision)

(Reaffirmed 2002) Switches for domestic and similar purposes



REFERENCES

1. Joint Procedure Order no. W-HQ/JBP/PL/Civil-Elect.-JPO dated 23.05.2013 issued by CEE/

WCR/ Jabalpur for invitation of Composite Tenders for Civil and Electrical works for

buildings and staff quarters.

2. Joint Procedure Order no. CAO/CON/WT/Circular dated 19.03.2012 issued by Chief

Admn. Officer (Con) Eastern Railway, Kolkata for invitation of Composite Tenders

including Civil and Electrical works for buildings and tube well.

3. Comments and suggestions received during the seminar held on 05.04.2017 at CAMTECH,

Gwalior on the subject.

4. IS: 4648- 1968 (Reaffirmed 1997) for Guide for Electrical layout in residential buildings.

5. IS: 732-1989 (Third revision) (Reaffirmed 2006) for Code of practice for electrical wiring

installations.

6. IS: 9537 Pt-3- 1983 for Conduits for electrical installations Part 3- Rigid plain conduits of

insulating materials.

*****



CAMTECH is continuing its efforts in the documentation and up-gradation of information

on maintenance practices of electrical assets. Over the years a large number of publications

on electrical assets have been prepared in the form of handbooks, pockets books, pamphlets

& video films etc. These publications have been uploaded on the internet as well as rail net.

For downloading these publications please do following:

1. On internet visit : www.rdso.indianrailways.gov.in

Go to Directorates CAMTECH Publications for download Electrical

Engineering

2. On Railnet visit RDSO website at 10.100.2.19

Go to Directorates CAMTECH Publications for download Electrical

Engineering

For any further information regarding publications please contact:

Director (Elect.) – 0751- 2470740 (O) BSNL, 9752447030 (CUG)

SSE/Electrical - 9755549297 (CUG)

E-mail at [email protected]

Fax to 0751- 2470841

Write at : Director (Electrical)

Indian Railways

Centre for Advanced Maintenance technology,

In front of Hotel Adityaz,

Airport Road, Maharajpur,

Gwalior, Pin code – 474 005

To upgrade maintenance technologies and

methodologies and achieve improvement in

productivity, performance of all Railway assets

and manpower which inter-alia would cover

reliability, availability, utilisation and efficiency.

OUR OBJECTIVE

http://www.rdso.indianrailways.gov.in/

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CAMTECH RECOMMENDATIONS ON PROCEDURE ORDER FOR … · CAMTECH RECOMMENDATIONS ON PROCEDURE ORDER FOR COMPOSITE TENDER WORK FOR BUILDING WIRING Maharajpur, GWALIOR - 474 005 dsoy dk;Zky;hu