A typical measured item in take off format follows: PVC heavy gauge push fit jts. However, junction boxes and the like are enumerated as extra over the conduit in which they occur (Y60:2.1-6.1.1), RICS (1997). The conduit is deemed © 2012 Cenresin Publications Volume 4, June 2012 Journal of Education and Policy Review to include all the labours and components described in Y60:C3. The conduit is measured over all conduit fittings and branches (Y60:M2). MEASUREMENT PROCEDURES CONDUIT: As stated by the Royal Institute of chartered surveyors (1998) in Seeley et al (2005), conduit (not in final circuits) is measured in metres, distinguishing between straight and curved, giving the radii, and stating the type, external size, method of fixing and background as Y60:1.1-2.1.1-5, and particulars of materials as appropriate (Y60:S1-6). The measurement of electrical services, as with mechanical services, requires the traditionally trained quantity surveyor to develop his knowledge of the underlying technology. Within the constraints of this paper, the relatively simple worked example can only provide an introduction to the subject. Once the route has been plotted and the specification fully understood, the measurement of the work is relatively straightforward, comprising enumerated items of equipment and final circuits and linear items of conduit, cable trunking, cable tray and cable on more complex systems, all measured in accordance with the rules prescribed in the standard method of measurement of builders work seventh edition (SMM7) by the Royal Institute of Chartered Surveyors (RICS, 1998). However, conduits and cables can sometimes be laid diagonally where running in floor screeds or in pitched roof voids. This is usually necessary because of the nature of the structure through which the conduits and cables are passing, as for example following joists or beams. (1997), when plotting conduit and cables it is usual to draw runs at right angles to each other rather than running diagonally. This sketch will then form a record of what is measured.Īn isometric sketch is often useful (as with pipework) to illustrate complex runs, Seeley I.H and Roger. Keywords: Buildings, Electrical, Conduit, Trunking, switchgear, miniature circuit breaker, installations INTRODUCTION Where electrical circuits are to be measured in detail, such as circuits other than lighting and small power, the route of the conduit and/or cable should be plotted on the plan or a tracing overlay and the number of cables indicated. The relatively simple worked example provided an insight to the subject and showed the method of measuring the electrical services to a small building in accordance with the details on drawing and the distribution sheet as shown. The paper revealed certain vital information which must be made available to the Quantity Surveyor either directly by the consulting Services Engineers or through the Architects. It identified the basic items that make up electrical installation including the procedure for their measurement in line with the relevant sections of the standards method of measurement of building works and services. As these standards are technical documnts which, by their very nature, require periodic updating, revised editions will be issued by the Ministry from time to time as.appropriate. The major benefits to be gained in applying these standards are the harmonization of professional practice and the ensuring of appropriate levels of safety, health and economy with due consideration of the objective conditions and needs of the country. The purpose of these standards is to serve as nationally recognized documents, the application of which is deemed to ensure compliance of buildings with the minimum requirements for design, construction and quality of materials set down by the National Building Code. In exercise of these powers and in discharge of its responsibility, the Ministry is issuing a series of Building Code Standards of general application. 41/1993 empowers the Ministry of Works and Urban Development to prepare the Country's Building Code, issue Standards for design and construction works, and follow up and supervise the implementation of same. EBCS-10 Ethiopian Building Code Standard ELECTRICAL INSTALLATION OF BUILDINGS FOREWORD The Proclamation to define the powers and duties of the Central and Regional Executive Organs of the Transitional Government of Ethiopia No.
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