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16.1 Basic Electrical Materials and Methods (16050)

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16.1 Basic Electrical Materials and Methods (16050) EL QAA RECREATIONAL SPACES UNDP ELECTRICAL SPECIFICATIONS BASIC ELECTRICAL MATERIALS AND METHODS PART 1 - General Requirements General The scheme includes all work of an electrical nature connected with the electrical services . All services must be carefully coordinated to provide a complete working installation. Works, materials, equipment or services not specifically mentioned in these clauses but mentioned or implied in other must check on the exact method of connecting up to the power supply brought to the substation and allow for coordinating with and receiving approval of the Electricity Authority. The L.V. shall be 3 phase and neutral 220/380 volts, 4 wire earthed neutral system. Scope of work The scope covers the supply to site, complete erection and installation, site testing, commissioning, and setting to work of all the necessary materials and equipment required for this installation as detailed in the specification and as shown on the drawings comprising the following : Main clauses of these specifications or indicated on the drawings must be included as part of the contract. Submain distribution boards, secondary distribution panel including all fixing supports, equipment protection, instrumentation, etc... Connections to submain distribution board, main distribution board and necessary connection to equipment. GN ELEC /1 EL QAA RECREATIONAL SPACES UNDP ELECTRICAL SPECIFICATIONS Lighting and power including all light points and fittings, supports, wires, conduits, electrical switches, socket outlets, plugs including supply and devices to all equipment requiring power. Earthing system, including all wires, cables, rods, pits and any expense in providing satisfactory tests for the satisfaction of the Engineer, that satisfactory earth connection has been established. Supply and installation of isolators and electrical outlets to serve equipment. All additional sundry equipment or materials necessary to form a complete and comprehensive installation whether specifically mentioned in the specifications or not, but which normally form part of such an installation. Testing of installation and taking over. Design drawings : The drawings supplied with the specifications are indicative only. The Contractor is required to submit complete shop drawings. GN ELEC /2 EL QAA RECREATIONAL SPACES UNDP ELECTRICAL SPECIFICATIONS Shop drawings : Before commencing with the work, the Contractor shall prepare and submit detailed shop drawings for all equipment and distribution services described herein. The Contractor shall submit all drawings for approval within the time specified. Large scale details shall be 1/10. Signed and approved drawings shall not be departed form, unless a signed variation order or site instruction is issued in writing by the Engineer. Drawings returned to the Contractor for alteration or amendment are to be resubmitted to the Engineer for approval. The contractor shall be responsible for any discrepancies, errors, or omissions in the drawings and other particulars supplied by him whether such drawings and particulars have been approved by the Engineer or not, provided such discrepancies, errors, or omissions are not due to inaccurate information or particulars furnished in writing to the Contractor by the Engineer. Design drawings : The Contractor shall submit drawings showing accurately the general layout of the whole installation and equipment. The exact routing of cables, conduits, cable ducts, cable trays, etc., are to be detailed by the Contractor, together with supports, exact sizes of conduits and trunking to be used in each location, and number and sizes of cables and wires run into conduits. The exact positions of lighting fittings and equipment shall be shown. Detail drawings are required for distribution boards showing exact method of fixing and locating and showing feeder cables. Diagramatic charts showing schematically each electrical system and designation of each panel circuit breaker etc., are also required. As built drawings : As per conditions of contract, the Contractor shall supply the Engineer with "as installed or as built drawings" all in accordance with the requirements for "shop drawings" updated to show the exact way the equipment have been installed. These drawings shall be on reproducible negatives. Circuit and System Layout : Before starting on any work connected with the electrical installation, the Contractor shall secure the approval of the Engineer to the whole of the layouts and the positioning of cable and conduit runs, GN ELEC /3 EL QAA RECREATIONAL SPACES UNDP ELECTRICAL SPECIFICATIONS junction boxes, boards, fittings and accessories etc... It is particularly important that all requirements are complied with and full approval is obtained. Guarantee : The Contractor shall guarantee in writing to the Engineer that all electrical works installed by him shall be free from any and all defects in workmanship and materials, and that all equipment shall withstand variations in temperature, load and atmospheric conditions which arise under working conditions without undue distortion, deterioration or setting up of undue stresses and strains in any part of such magnitude as to offset the strength and suitability for the various parts. It shall also be guaranteed that all equipment have or will perform the capacities and characteristics indicated on the drawings or specified, and that if during a period of ONE YEAR from date of the certificate of completion and acceptance of his work, any such defects in workmanship, materials or performance appear, he will promptly remedy them to the satisfaction of the Engineer. All costs involved in carrying out this work shall be to the Contractor's expense. Accessibility All work shall be so designed and installed as to be easily accessible for operation, maintenance and repair. Rejection All work shall be carried out to the satisfaction of the Engineer. Any work refused by the Engineer shall be removed and rebuilt and replaced by the contractor at no cost to Engineer in a satisfactory manner as governed by this specification. All work disturbed, injured or destroyed in the course of removal of the said work shall be made good at the contractor's own expense. GN ELEC /4 EL QAA RECREATIONAL SPACES UNDP ELECTRICAL SPECIFICATIONS Erection The Contractor shall be responsible for organizing his work as shall be necessary to enable him to execute the works, keep the site reasonably clean, remove all waste material as it accumulates and as directed by the Engineer. The Contractor shall provide all lifting beams and slings for moving and erecting equipment on site, unless otherwise specified. He also shall provide, erect, alter as required and alternatively remove all temporary scaffolding required to facilitate erection of works. Storage of Materials and Equipment All materials and equipment are to be stored in a manner as not to obstruct the work of others. It shall be adequately protected at all times against corrosion, deterioration and the ingress of foreign matter. All equipment must be kept clear of the floor or ground by means of wooden bearers or other approved means. Safeguard to Equipment It shall be the Contractor's responsibility to safeguard by means of temporary or permanent supports or otherwise all cables, pipes and equipment and other materials and equipment which would be liable to suffer damage if such precautionary measures were not taken. Safeguard to Equipment Temporary and permanent safeguards shall be to the approval of the Engineer. Safeguard to personnel All "Live" parts of electrical equipment shall be protected in such a way as to adequately safeguard from injury all personnel working on or in the vicinity of equipment. Wherever possible, all protective guards shall be supplied by the equipment manufacturer. All precautioning means must be taken to safeguard all personnel against site hazards. GN ELEC /5 EL QAA RECREATIONAL SPACES UNDP ELECTRICAL SPECIFICATIONS Standards and Regulations All the electrical installation shall be in accordance with the International Electro-technical Commision (IEC) recommondations and the following codes : UTE manufacturing standards. NFC 13-100 for high voltage power supply. NFC 15-100 for meduim voltage power distribution. NFC 17-100 for low voltage systems. NEC. BS 7671 (The IEE wiring regulations). However, the Contractor may offer materials and equipment to alternative standards provided such items conform to the real intent of the specifications and approval is obtained for these alternatives. All equipment and materials to be incorporated in the works shall be brand new bearing stamped ratings as required and must be approved by the Engineer prior to their use. Omissions If anything necessary to the proper installation or operation of the electrical system is omitted from the drawings and specifications, or if indicated incorrectly, the Contractor shall immediately call the attention of the Engineer to this Omission or inaccuracy, before work drawings are prepared. Should the Contractor fail to do so, he shall be held responsible and shall make good at his own expense such errors or any damages caused by such Omissions. Samples Samples of parts, fittings and fixtures shall be submitted to the Engineer by the Contractor for approval before work commences. The parts used in the work done by the Contractor shall not vary in any manner from the samples submitted and approved. GN ELEC /6 EL QAA RECREATIONAL SPACES UNDP ELECTRICAL SPECIFICATIONS Tests The completed systems
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