Electrical Installation Design: Proposal on Residential Installation Design

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• Published : May 18, 2013

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SCHOOL OF ENGINEERING ELECTRICAL ENGINEERING DIVISION Electrical Installation Design (EID) Proposal On

Residential Installation Design

Introduction
E-power is a company that specializes in residential installation design at incredibly fair and competitive prices. We complete every electrical installation or design service safely, on time and on budget and with over 20 years’ experience in thus industry, we know exactly how to install systems that will save you money as well as help the environment. We provide a comprehensive range of design, installation, testing and maintenance services. Our diverse range of electrical contracting services includes: • • • • • • Commercial electrical design and installation Domestic electrical repairs and installations Lighting and power systems Alarms, CCTV, emergency and security lighting Portable Appliance Testing Commercial and industrial factory refurbishments

Contents

Chapter 1: Design Concepts
1.1 Design Requirement
• • • • • • • • • • General provision of 13 A switched socket outlets (SSO). Each circuit to serve not more than 50 m2 of floor area. Additional SSO to be provided at specific location for known appliance e.g. kitchen, living and family areas, Not more than 3 nos. of SSO connected to a 20A circuit serving kitchen area, One number of multi-split air-conditioner unit ( assume 3 kW, pf=0.85) provided with isolator point (20A) located at the Yard area, Water heater (instantaneous type) 2 kW located in bathroom, Each lighting circuit should not be connected to more than 10 lighting points, Fluorescent lamps are to be provided in the kitchen and store room, One consumer unit located at the entrance/store room, One meter kiosk located at the entrance, . Use appropriate diversity factors in your calculations and explain why the values are used.

1.2 Design rules for lighting circuit • To indicate the location clearly

4

To indicate the switching arrangement

One way switch control

Two-way switch control

Legends
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L1: same circuit number indicate that they are from the same MCB control by the same switch

: One way switch

: two gang switch

: two way switch

General rules
1. 2. 3. 4. 5. 6. Assume a maximum rating of each lighting point is 100W Not more than 10 lighting/fan points in a circuit No switch should be located inside bathroom Use 6A or 10A SPN MCB Use 1.5 sq mm cable size For discharge lamp without exact information, the loading of circuit be determined by multiplying the rated lamp power (watts) by a factor 1.8 I=p*1.8/V This multiper takes into consideration a circuit power factor of not less than 0.85 lagging, and also control gear losses and harmonic currents.

1.3 Design rules for switched socket outlet
• • • • • Not more than 3 SSO ( 15/20 A MCB, 2.5 sq mm) serving area including kitchen Not more than 6 SSO ( 20A MCB, 2.5 sq mm cable) serving a room which is not a kitchen Not more than 6 SSO (30A MCB, 4 sq mm cable) serving area including kitchen Not more than 10 SSO (30A MCB, 2.5 sq mm cable) in ring circuit. No socket outlet is allowed inside the bathroom

Legends:

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1.4 The difference between radial and ring circuit for switched socket outlet Ring circuit