A sample Specification for Electrical Construction Contract Works that describes General Conditions And Requirements to accomplish electrical works all in conjunction with Architectural, Civil, Mechanical and other services.
1. Requirements of Regulatory Agencies
Codes and standards: All electrical equipment, materials, installation and workmanship shall comply with the latest edition of the applicable codes and standards of any of these organization listed below:
- National Electric Code (NEC).
- Underwriter laboratories (UL).
- Institute of Electrical & Electronic Engineers (IEEE).
- National Fire Protection Association (NFPA).
- National Electrical Manufacturers Association (NEMA).
- Insulated Power Cable Engineers Association (IPCEA).
- American National Standards Institution (ANSI) and or BS code, IEE regulations or VIDE or any other approved equivalent standards.
2. Materials
Al materials furnished under this specification shall be new and shall conform to any of the standard such as Underwriters Laboratories, the American National Standards Institute, the National Fire protection Association or BS or equivalent.
Where material standards have not been established by UL/ANSI/NFPA/BS/VDE standards or quality and performance shall be those of the reputed manufacturer.
Each major class of equipment through out the installation shall be by a single manufacturer.
Catalogue and samples of all equipment and materials to be supplied under this specification shall be submitted prior to installation for approval.
Wherever applicable and appropriate, the manufacturer’s test certificates shall be submitted for approval.
The contractor shall furnish all valid documents to show that the materials proposed to use in the project are readily available, guaranteeing the availability of spare parts within the Kingdom.
3. Drawings
The drawings and specifications are intended to describe the work comprehensively, but are not intended to be complete in every detail. Wherever reasonably implied by the nature of the work, all materials shall be furnished and installed by the contractor as a part of his contract work. Any omissions from either the drawings or the specifications are unintentional and it shall be the responsibility of the contractor to include all such items and to provide and install all systems complete and in operable condition.
All contract drawings of any trade which may effect the location of any outlets, apparatus & equipment shall be consulted to avoid possible interferences and permit full coordination of all work.
All electrical equipment such as junction and pull boxes, panel boards, switches, controls and such other apparatus as may require maintenance and operation periodically shall be made easily accessible. Although the equipment may be shown on the drawings in certain locations, the construction may disclose the fact that such locations do not make its position readily accessible.
The contractor shall prepare detailed working drawings for approval to the Supervising Engineer. These drawings shall comply with and complement the contract drawings to the extent of showing the physical layout of all equipment, details of installations, materials and methods. No changes shall be made without the prior approval of the Supervising Engineer.
4. Manufacturer's Working Drawings
The contractor shall obtain manufacturers working drawings for all specialist items of equipment such as distribution boards, panel boards etc. and submit them to the Supervising Engineer for their approval before commencement of manufacture.
5. Record Drawings and Maintenance Manuals
On completion of the contract the contractor shall provide one set of record negatives on heavy duty PVC reproducible film and three sets of dye line prints of the works as installed. The drawings shall indicate the route and size of all conduits and cables installed whether buried or surface fixed type and rating of luminaires, details of the circuits used on all distribution board and the drawings showing all other services called for, in the electrical section. Schematic contract drawings shall also be submitted incorporating the details of any changes made during the contract.
The contractor shall also submit three copies in plastic covers of a maintenance and operating manual for specialist plant describing the maintenance routines, method of adjustment, typical fault finding routines and wiring diagrams. It shall also include a comprehend list of materials, accessories and equipment used in appropriate replacement part reference numbers.
6. Electrical Power Supply
Power will be 380/220V (or 415/240V), 3-phase, 60 Hz (or 50 Hz) with provision for utility connection. Distribution will be 380/220V (or 415/240V), 3-phase, 4-wire and 60 Hz (or 50 Hz).
7. Coordination with Supply Authority
The contractor shall coordinate with the local electricity supply authority to agree their precise requirements on the site and final details and positions for metering equipment, service connection etc.
The contractor shall also be responsible for advising the supply authority to when the permanent supply will be required for programming and progressing their activities on the site.
8. Location of Electrical Equipment
The location and dimension of electrical equipment shown on plans shall be considered as approximate and diagrammatic only. The contractor shall determine the exact location to meet the field conditions, avoid interference with other equipment and services or for other sufficient reasons. The mounting heights of electrical equipment where not indicated or detailed on the plans, shall be as noted below:
- Convenience outlets, telephone outlets and television antenna outlets 300 mm above finished floor to bottom of the box.
- Light switches, push button station, selector switches and all other toggle or control switches 1200 mm above finished floor to bottom of the box.
- Panel boards for lighting, power, telephone and other auxiliary systems 2000 mm above finished floor to top of panel.
- Disconnect switches, service switches and individually mounted starters and connector approximately 1500 mm above finished floor to center line.
- Fire alarm pull station 1200 mm above finished floor to bottom of the box.
- The mounting height for all equipment, except as noted shall be as recommended by the equipment manufacturer.
- All switches, socket outlets and any other power outlets in the kitchen and toilet shall be mounted as 1200 mm above finished floor level.
