1. The electrical installations in general shall be as shown in our electrical drawings and/or in the specifications.

2. The electrical installation is to be in accordance with latest edition of EDD rules and regulations together with BS7671 wiring standard and latest IEE regulations.

3. All electrical work shall be executed in a neat and workmanlike manner. All exposed conduits shall be routed parallel or perpendicular to wall and structural members. Junction box shall be securely fastened, set true and plump, and flush with furnished surface when wiring method is concealed.

4. All materials shall be new and shall be listed and bear the appropriate label of Underwriters Laboratories, Inc., or another recognized testing laboratory for the specific purpose. The material shall be the size and type specified on drawings and/or in the specifications.

5. The electrical contractor shall verify exact location, heights, outlet and switch arrangements, and equipment prior to rough-in. No additions to the contract sum will be permitted for outlets in wrong locations, in conflict with other work, and so on. The owner reserves the right to relocate any device up to 3m prior to rough-in, without any charge by the electrical contractor.

6. General lighting branch circuits shall be minimum 2.5Sq.mm copper protected single core PVC cable by 10/15A over current devices. Small appliances circuit shall be minimum 4 Sq.mm copper protected single core PVC cable by 20A over current devices, All other circuits are as per load requirements

7. The electrical contractor shall furnish all wiring materials and make all final electrical connections for all permanently installed appliances such as, but not limited to, furnace, water heater, water pump, built-in ovens and ranges, food waste disposer, dishwasher, washing machine and clothes dryer. (These appliances are to be furnished by the owner)

8. Furnish and install dimmer switches where indicated9. All panel board shall be furnished with typed card directories with proper designation of the

branch-circuit loads, feeder loads, and equipments served. The directories shall be located in the panel in a holder for clear viewing.

10. Upon completion of installation, the electrical contractor shall review and check the entire installation, clean equipment and devices, and remove surplus materials and rubbish from the owner’s property, leaving the work in neat and clean order and in complete working condition. The electrical contractor shall be responsible for removal of any cartons, debris, and rubbish for equipment installed by the electrical contractor, including equipment furnished by the owner or others and removed from the carton by the electrical contractor

11. The entire electrical installation shall be tested to tests prescribed in BS7671-1992 and that prescribed in the particular specification.

12. Testing of electrical installation shall be done in the presence of engineer.13. Electrical contractor should submit two copies of test results. Electrical contractor should check

and test the polarity of all sockets installed.14. Electrical contractor should check and test all ELCB’s at rated current and tripping time shall be

recorded.15. Electrical contractor should measure the insulation resistance of the main cable and submain

cables.

16. Electrical contractor should measure the earth loop impedance for the following equipment (a) Sockets (b) Light fittings (c) Main incomers (d) Air conditioners (e) conducting pipes. All db’s shall be with identification of circuit “ Fed from which switch gear and module number” Distribution boards name and rating of main incomer, not more than 10HM is accepted for measuring the earthing test for the complete system installation

17.18. The electrical contractor shall furnish and install a complete electrical system as shown on our

electrical drawings and/or in the specifications, where there is no mention of the responsible party to furnish, install, or wire for a specific item on the electrical drawings, the electrical contractor will be responsible completely for all purchases and labor for a complete operating system for this item.

1. GENERAL1.1 The electrical installations in general shall be as shown in our electrical drawings

and/or in the specifications.1.2 The electrical drawings shall be read in conjunction with all relevant architectural

and other associated detailed drawings issued along with tender.2. REGULATIONS

2.1 The electrical installation is to be in accordance with latest edition of EDD rules and regulations together with BS7671 wiring standard and latest IEE regulations

3. SCOPE3.1 The electrical contractor shall supply and install a complete electrical system as

shown on our electrical drawings and/or in the specifications, where there is no mention of the responsible party to supply, install, or wire for a specific item on the electrical drawings, the electrical contractor will be responsible completely for all purchases and labor for a complete operating system for this item.

3.2 The electrical contractor shall be responsible to co-ordinate with batelco or telephone service provider for internal and external requirements of telephone ducts, manholes, junction boxes, riser trays/trunking. etc., and shall obtain approval from batelco or telephone service provider prior to commencement of the work.

4. MATERIALS4.1 All materials shall be new and shall be listed and bear the appropriate label of

Underwriters Laboratories, Inc., or another recognized testing laboratory for the specific purpose. The material shall be the size and type specified on drawings and/or in the specifications.

4.2 Material submittal along with samples to be submitted for the approval of engineer prior to release the order. Unapproved materials must not be used in the site.

5. DRAWINGS5.1 Drawings to be co-ordinate by the contractor with other services and properly

dimensioned working drawings to be submitted for the approval of architect/engineer prior to start the work at any section.

6. LOCATION OF OUTLETS6.1 The electrical contractor shall verify exact location, heights, outlet and switch

arrangements, and equipment prior to rough-in. No additions to the contract sum will be permitted for outlets in wrong locations, in conflict with other work, and so on. The owner reserves the right to relocate any device up to 3m prior to rough-in, without any charge by the electrical contractor.

6.2 Exact location of all the lighting fixtures, detectors, fans, etc., shall be in line with the reflected and coordinated ceiling layouts of various floors, rooms and other relevant furniture layouts.

6.3 All lighting switches shall be minimum 10A grid mounting type and shall be suitable for flush installation in concealed system. Switches shall be ganged as per approved shop drawings.

6.4 All switches and wall lights shall be provided at a distance of 150mm from door frame and/or window frame in general, exact location shall be as per approved shop drawings.

7. WIRING AND INSTALLATION METHOD7.1 All wiring for lights, sockets and switches should be PVC single core cables drawn

through heavy guage (BS6099), Wiring in plant areas and in surface installation should be PVC single core cables drawn through G.I conduit only

7.2 Minimum conduit size for branch circuit wiring shall be diameter 20mm, The number of wires in one conduit shall not be greater than those specified in the prevailing EDD regulations

7.3 Diameter 25mm PVC conduits shall be used for extra low voltage services like Data, Voice and Television

7.4 Wherever long length of conduits, pull boxes shall be provided at every 10 meters.7.5 The PVC conduit shall be of a continuous and effective means of protection for

wiring and a separate earth wire shall be drawn into all conduits 7.6 All the PVC conduits shall be laid concealed in the block works or above the ceiling,

no conduits to be laid in screed or plaster7.7 20% spare conduits shall be provided for future usage for necessary applications.7.8 All external electrical items shall be weather proof and water tight to comply with

min. IP657.9 Space factor in conduits and trunking should be as per EDD recommended.7.10 All adaptable boxes shall have minimum depth of 1.5 times the conduit sizes7.11 All spare/empty conduits shall be provided with pull wires with 200mm extra

length7.12 All damaged / unused conduits should be properly sealed7.13 Conduits with draw wires, trunking etc., to be provided for thermostats and

associated control wiring as per approved A/C drawings and mechanical drawings.7.14 Where suspended ceiling exists, the conduit may run on the structural soffit7.15 All necessary supports shall be provided to install all electrical items in an

approved manner7.16 All recessed fittings shall suit to approved type of false ceiling7.17 Metal clad type accessories shall be installed in all plant areas. Other areas

wiring accessories shall be molded ivory finish unless otherwise mentioned7.18 All circuit switches and sockets are to be identified properly by labels7.19 All general socket outlets shall be rated 13A and rectangular pin type to BS1363,

unless otherwise specified.7.20 Bending radius of all cables shall not be less than specified in the IEE regulations,

Chapter 52, Section 529.3, Table 52C during installation7.21 All openings made for cable trays, trunkings, conduits, ducts in riser shaft, slabs,

walls and such other places in building shall be sealed with fire resistant material in an approved manner

8. MOUNTING HEIGHTS8.1 Lighting switches/push buttons 1300mm 8.2 Socket outlets 400mm / above bench/ 1300mm in plant rooms8.3 Telephone outlets 400mm8.4 Weather proof socket outlets 1300mm8.5 Spur and DP switches 1300mm /@H/L ceiling void (for A/C units)8.6 Bells 2000mm8.7 Wall mounted light fittings 1800mm/to arch requirements8.8 Distribution boards 1800mm (Top)8.9 Break glass unit 1300mm

All distance are measured from the centerline of each item from finished floor level

9. CONDUCTOR SIZE9.1 General lighting branch circuits shall be minimum 2.5Sq.mm copper protected single

core PVC cable by 10/15A over current devices. Small appliances circuit shall be minimum 4 Sq.mm copper protected single core PVC cable by 20/32A over current devices, All other circuits are as per load requirements

10. LOAD BALANCING10.1 The electrical contractor shall connect all loads, branch circuits and feeders as

per the approved panel schedule, but shall verify and modify these connections as required to balance connected calculated loads to within 10 percent variation

11. APPLIANCE CONNECTIONS11.1 The electrical contractor shall furnish all wiring materials and make all final

electrical connections for all permanently installed appliances such as, but not limited to, furnace, water heater, water pump, built-in ovens and ranges, food waste disposer, dishwasher, washing machine and clothes dryer. (These appliances are to be furnished by the owner)

11.2 Electric supply for A/C system is part of contract

12. DIMMERS12.1 Supply and install dimmer switches where indicated.

13. EXHAUST FANS13.1 Supply, install and connections for all exhaust fan indicated on the plans.13.2 All roof mounted extract fans shall have heavy gauge housing, stiffened against

drumming, complete with sound attenuating curbs and shall be mushroom type. 14. LIGHTING

14.1 In general, not more than 10 lights shall be connected to any one lighting branch circuit. Exceptions can be made in the case of low-current-consuming lights.

14.2 Wiring for lighting sub circuits shall be carried out by using minimum 2.5 Sq.mm PVC cable for a circuit wattage not to exceed 1000 watts.

14.3 The fluorescent fittings shall be HPF of 0.9 PF minimum and switch start type with capacitor to avoid radio interference

14.4 All external lights shall be controlled automatically by 24hrs adjustable electromechanical/ electronics programmable timer switches

15. PANEL /DISTRIBUTION BOARDS15.1 The main Panel Board shall be of wall or floor mounted type, metal enclosed,

dust and vermin protected front operated and of clean and modern appearance15.2 The panel board shall be protected to minimum IP53 in accordance with BS

542015.3 All panel board shall be furnished with typed card directories with proper

designation of the branch circuit loads, feeder loads and equipments served. The directories shall be located in the panel in a holder for clear vision

15.4 Electrical safety labels such as ‘ DANGER’ shall be fixed in front of all distribution boards, incomers and other electrical hazardous

15.5 All MCCB’s shall have minimum braking capacity of 14kA for ratings 15-100A, 30kA for 125-400A, 50kA for 400-800A and adjustable overload

15.6 All MCB’s shall have minimum breaking capacity of 6kA15.7 All distribution boards shall be equipped with MCB’s and shall incorporate a set

of fixed busbars and a main isolator as shown on drawings15.8 All MCB’s shall be rail mounted in type and they can be readily removed or

canted for wiring and inspection16. BONDING AND EARTHING

16.1 Earth bonding to be provided for cold and hot water pipes16.2 All metallic back boxes, Individual Db’s, Incomers shall be earthed properly

17. TESTING AND COMMISSIONING17.1 The entire electrical installation shall be tested to tests prescribed in BS7671-

1992 and that prescribed in the particular specification.17.2 Testing of electrical installation shall be done in the presence of engineer.17.3 Electrical contractor should submit two copies of test results. Electrical

contractor should check and test the polarity of all sockets installed.17.4 Electrical contractor should check and test all ELCB’s at rated current and

tripping time shall be recorded.17.5 Electrical contractor should measure the insulation resistance of the main cable

and sub main cables.17.6 Electrical contractor should measure the earth loop impedance for the following

equipment (a) Sockets (b) Light fittings (c) Main incomers (d) Air conditioners (e) conducting pipes. All db’s shall be with identification of circuit “ Fed from which switch gear and module number” Distribution boards name and rating of main incomer, not more than 10HM is accepted for measuring the earthing test for the complete system installation

18. TELEPHONE18.1 The electrical contractor shall be responsible for the supply and installation of

all the conduit work for the telephone installation as shown drawings and in accordance with the requirements of BATELCO. The supply and installation of all wiring and equipment will be carried out by others.

18.2 Conduits for telephone outlets shall terminate in a flush plastic box with an ivory blanking plate. All conduits shall be complete with suitable draw wires installed to enable the system wiring.

18.3 The Contractor shall also seek the approval of the BATELCO of the system installed for all conduit runs before commencement of the installation.

19. FIRE ALARM DETECTORS19.1 Supply and install all detectors and associated wiring as per manufacturer’s

instructions and comply with codes of NFPA and CDFSA20. DOORCUM/VIDEO INTERCOM SYSTEM

20.1 Provide conduit and wiring as shown on the drawings in concealed conduits of not less than diameter 25mm and draw wires to be drawn

21. SECURITY SYSTEM21.1 Provide conduit/boxes/pull wires to be drawn for security system

camera/screen etc., as approval22. SATELLITE MAIN ANTENNA TELEVISION (SMATV)

22.1 Provide conduits/power supply for boxes/pull wire to be provided from roof to down

23. HOME AUTOMATION SYSTEM 23.1 Home automation system shall be provided to meet the requirements of

Architects/client if required24. FINAL SITE CLEAN UP

24.1 Upon completion of installation, the electrical contractor shall review and check the entire installation, clean equipment and devices, and remove surplus materials and rubbish from the owner’s property, leaving the work in neat and clean order and in complete working condition. The electrical contractor shall be responsible for removal of any cartons, debris, and rubbish for equipment installed by the electrical contractor, including equipment furnished by the owner or others and removed from the carton by the electrical contractor

25. GUARANTEE OF INSTALLATION25.1 The electrical contractor shall guarantee all work and materials for a period of

one full year (DLP – Defect liability period) after final acceptance by the architect/engineer, electrical inspector and owner