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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.
CAMECH/E/2017-18/EP-2-Wiring/1.0 2
CAMTECH Recommendation on Procedure Order for Composite Tender Work for Building Wiring May, 2017
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.
CAMECH/E/2017-18/EP-2-Wiring/1.0 3
CAMTECH Recommendation on Procedure Order for Composite Tender Work for Building Wiring May, 2017
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
CAMECH/E/2017-18/EP-2-Wiring/1.0 4
CAMTECH Recommendation on Procedure Order for Composite Tender Work for Building Wiring May, 2017
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
CAMECH/E/2017-18/EP-2-Wiring/1.0 5
CAMTECH Recommendation on Procedure Order for Composite Tender Work for Building Wiring May, 2017
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
CAMECH/E/2017-18/EP-2-Wiring/1.0 6
CAMTECH Recommendation on Procedure Order for Composite Tender Work for Building Wiring May, 2017
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).
CAMECH/E/2017-18/EP-2-Wiring/1.0 7
CAMTECH Recommendation on Procedure Order for Composite Tender Work for Building Wiring May, 2017
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
CAMECH/E/2017-18/EP-2-Wiring/1.0 8
CAMTECH Recommendation on Procedure Order for Composite Tender Work for Building Wiring May, 2017
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
CAMECH/E/2017-18/EP-2-Wiring/1.0 9
CAMTECH Recommendation on Procedure Order for Composite Tender Work for Building Wiring May, 2017
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
CAMECH/E/2017-18/EP-2-Wiring/1.0 10
CAMTECH Recommendation on Procedure Order for Composite Tender Work for Building Wiring May, 2017
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.
*****
CAMECH/E/2017-18/EP-2-Wiring/1.0 11
CAMTECH Recommendation on Procedure Order for Composite Tender Work for Building Wiring May, 2017
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 direlcamtech@gmail.com
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
Recommended