Amenazas

A4.1 SCOPE OF REQUIREMENT

This Section covers the current contractual practices for Contract/Sub-contract/ Quotation let by the Architectural Services Department for electrical installation and shall be read in conjunction with the documents of the Contract for a particular project.

The word “installation” shall mean not only the major items of plant and apparatus conveyed by this Specification and the Contract, but also all the incidental sundry components necessary for the complete execution of the work and for the proper operation of the installation, with their labour charges, regardless whether these sundry components are mentioned in detail in the tender documents issued in connection with the Contract.

A4.2 STANDARD/GUIDANCE DRAWINGS

These are standard abbreviations and symbols and standard/guidance drawings prepared by BSB to show details of the common standard installations. The Contractor shall refer to these standards and drawings whenever such are mentioned or specified in the Drawings or the Particular Specification. The same standards shall also be used in the Contractor's "as-fitted" drawings, etc., whenever applicable.

A4.3 DRAWINGS PROVIDED BY THE CONTRACTOR

A4.3.1 Size of Drawing

Drawings submitted by the Contractor shall be of a standard size from A0 to A4 in accordance with ISO 5457 (BS 3429). As-fitted or as-built drawings shall be of A0 or A1 size only.

A4.3.2 Working Drawing

Working drawings shall be dimensioned and showing construction, sizes, weights, arrangements, operating clearances, performance characteristics and the necessary builder’s work involved.

Working drawings for conduit layout shall clearly indicate the proposed position and size of conduit runs, together with the number of cables, size and circuiting of the cables therein.

A4.3.3 As-fitted or As-built Drawing

As-fitted or as-built drawings shall show the positions of all conduits, cables, switchgear, distribution boards, luminaires, lightning protection

and earthing and all other items which have been installed. As-fitted or as-built drawings shall be submitted in the media of prints, reproducible copies, microfilms and computer disks all as specified in the contract documents.

A4.3.4 Submission of Drawings during Construction

The Contractor shall submit to the Architect a comprehensive "Submission Schedule" of working drawings within two weeks after the tender is awarded, taking into account of the overall programme of the project. No equipment shall be delivered to site and no work shall be executed until such drawings have been approved. The Contractor shall ensure that working drawings are progressively submitted in accordance with the agreed "Submission Schedule".

Failure of the Contractor to submit the working drawings in good time shall not entitle him to extension of contract period, and no claim for extension of time for completion by reason of such failure will be considered.

The Contractor shall provide at least six (6) copies, unless otherwise specified in the Contract, of the agreed working drawings to the Architect for distribution.

A4.3.5 Submission of Framed Drawings upon Completion

The Contractor shall provide framed drawings to each major switchroom showing the schematic wiring diagrams, tables or charts to indicate the type and composition of circuits, identification and location of item of equipment from that switchroom. The framed drawings shall be fixed to the wall in such a way that it can easily be removed for reference.

A4.4 SUBMISSION OF TECHNICAL INFORMATION DURING TENDER STAGE

When required by the Contract, the Contractor shall submit, together with his tender submission, three copies each of the following, as appropriate :

(a) One set of fully descriptive technical literature of all materials and equipment to be offered

The literature shall show sufficient details for tender evaluation. Such details shall include construction, dimensions, method of installation, weights, circuit diagrams, materials used, etc.

(b) Photometric and other relevant data for lamps and/or luminaires

This shall include lamp output, polar curve, upward and downward light output ratio, luminous area and Zonal Classification of each luminaire, and control gear loss, etc.

Section A4

A4.5 SUBMISSION OF OPERATION AND MAINTENANCE (O&M) MANUALS

Upon completion of the installation, the Contractor shall submit copies of O&M manual to the Architect incorporating all amendments made during the course of the Contract, all as specified in the contract documents.

A4.6 SAMPLES BOARD

A sample board containing samples of electrical cables, conduits, trunking, plugs and sockets, etc., offered by the Contractor shall be submitted to the Architect for approval before the commencement of the installation work. The sample board shall bear the name of the Contractor, the title of the Contract and a list of the samples together with the names of the manufacturers. The approved sample board shall be displayed in the site office throughout the whole of the contract period.

The Contractor shall also supply sufficient samples of materials required for testing purpose.

A4.7 SUBMISSION OF TESTING AND COMMISSIONING PROCEDURE

Upon completion of the installation but prior to acceptance, the Contractor shall submit to the Architect in good time a schedule showing the appropriate testing and commissioning procedures to be carried out. The schedule shall be agreed by the Architect before any testing and commissioning work is carried out.

A4.8 DOMESTIC APPLIANCES SUPPLIED BY THE EMPLOYER

Certain items of domestic appliances will be supplied by the Employer.

The quantities of all domestic appliances supplied by the Employer will be indicated in the Contract for the project. The Contractor shall be responsible for the collection, transportation and safe custody on site of all items so supplied. Domestic appliances supplied by the Employer may be supplied in loose component parts. The Contractor shall assemble, inter-connect the component parts, subsequently install and set the domestic appliances ready for use by the occupants of the building. The Contractor shall also supply and connect plugs to the domestic appliances if required.

The Contractor shall be responsible for returning all items so supplied to the Employer’s designated Stores or Depots when such items are found to be surplus to the requirements.

A4.9 PROVISION OF SPARE FUSES IN MAIN SWITCH ROOM

The Contractor shall supply and install one complete set of spare fuses for each rating of switchfuse or fuseswitch installed. The spare fuses shall be hung on a wooden board fixed at a convenient position inside the main switch room.

The wooden board shall be smoothed on the front face and edges, and shall be painted to the approval of the Architect.

A4.10 REQUIREMENTS DURING MAINTENANCE PERIOD

During the Maintenance Period, the Contractor shall, at no cost to the Employer, attend to all faults and complaints, remedy all defects, replace all malfunctioning items and maintain the complete installation in a clean and tidy condition to the satisfaction of the Architect. In case of emergency calls, the Contractor shall arrive within 3 hours and rectify all defects leading to fault or breakdown within 24 hours at any time during the Maintenance Period.

The Contractor shall also replace all burnt out lamps at no cost to the Employer if the failure of lamps is still within the manufacturer’s guaranteed life period. The Contractor will be permitted to charge for the cost of lamps only if they fail beyond the guaranteed life period.

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SECTION B1