Construction Measurement III Week 4 Electrical Single Phase

8/2/2019 Construction Measurement III Week 4 Electrical Single Phase

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Construction Measurement III(SBQ 3314)

Electrical Installations Single Phase

Lecture By Dr Sarajul Fikri Mohamed

Department of Quantity Surveying, FAB, UTM Skudai Johor, Malaysia

05th January 2010


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Pre-cast and Pre-stressed ConcreteCIVIL WORKS

Electrical Installations

Fire Fighting Installations

Air Conditioning Installations

Unit/Split Package/Central

Landscape Works

Single Phase Three Phase

Gas Installations

ELECTRICAL WORKS

MECHANICAL WORKS

LANDSCAPE WORKS

Hard Landscape Soft Landscape

MAIN COURSE COMPONENTS


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2009 Sarajul Fikri Mohamed

Read and check drawing

Drawing numbering and scale

used.

Taking off list Heading and Description

Take off

Annotation / Side Cast

Query list

Final checking

BQs FOR ELECTRICAL

INSTALLATIONS SINGLE PHASE

PROJECT DRAWINGS

Output

3

Building services technology

Electrical components

Measurement rules: SMM2

Description Taking Off

Case Study

KNOWLEDGE

Table of contents

ELECTRICAL INSTALLATIONS: SINGLE PHASE


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1. Electrical installations: main components

2. SMM2 measurement rules for electrical installations

3. Taking off list for electrical installations

4. Heading and description.

5. Case study: CADANGAN MEMBINA DEWAN SERBAGUNA TAMAN

KOTA JAYA, KOTA TINGGI, JOHOR

6. Studio work

Table of contents

ELECTRICAL INSTALLATIONS: SINGLE PHASE


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Electrical installation

and components


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Electrical distribution

ELECTRICAL INSTALLATIONS


7/102



Power transmission and distributions


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Types of electrical work


From substationto substation

External

Supply

From DB to powerpoints and fittings

InternalSupply 240V with a less

load and domesticuse

Single

Phase

415V with abigger load andsupply needed for(comercial danindustrial)

Three Phase

Two options


9/102

Voltan yang dikenakan ialah 415 v dan juga boleh mencecah 880 v bagikilang yang menjalankan kerja berat seperti kilang besi dan kilang simen.

Ia mempunyi tiga pengalir hidup dan neutral.

Pengalir-pengalir hidup dikenalkan dengan kod-kod aksara berikut:

LI atau R (red): Fasa pertama

L2 ataU Y (yellow): Fasa kedua

L3 atau B (blue) : Fasa ketiga

Single and three phase


Bagi penggunaan rumah kediaman, voltan tiga fasa adalah terlalu tinggi dan

merbahaya.

Oleh itu voltan rendah daripada satu fasa lebih sesuai digunakan untuk tujuan

domestik.

Voltan piawai satu fasa ialah 240 v. Biasanya satu pengalir hidup digunakanbersama pengalir neutral iaitu:

RN

YN

BN

Three Phase

Single Phase


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VIDEO PRESENTATION I

SINGLE PHASE ANDTHREE PHASE : THE THEORY

Fakulti Alam Bina


11/102


INCOMING SERVICES

MAIN INSTALLATION

POWER INSTALLATION

LIGHTING INSTALLATION

CABLES

Main components


ELECTRICAL APPLIANCES

CONDUIT AND FITTING

LIGHTNING PROTECTION SYSTEM

TESTING


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INCOMING SERVICES

MAIN INSTALLATION

POWER INSTALLATION

LIGHTING INSTALLATION

ELECTRICAL APPLIANCES

FINAL SUB-CIRCUIT

CABLE

CONDUIT

LIGHTNING PROTECTION

TESTING


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VIDEO PRESENTATION 2

BASIC HOMES ELECTRICALSYSTEM

Fakulti Alam Bina


14/102

POWER

INSTALLATION

LIGHTING

INSTALLATION

ELECTRICAL

APPLIANCES

3 pin switch socket Fluorescent light

Wall light

EXIT sign

High bay light

EL light

Exhaust fan

Sweep ceiling fan

CONDUIT &

FITTING

CABLES TESTING

Chased into brickwallCeiling level

2x1c/2.5mm PVC cable2x1c/1.5mm PVC cable

On completion of the electricalinstallation test all switches, switch

socket, wiring etc and make good

all defects an leave everything

perfect working order to the

satisfaction of the S.O and TNB

Main components



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Electrical typical legend in M&E drawings



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DB & FUSES

ELCB

MAIN SWITCH FUSE

TNBMETER

CUT OFF FUSE


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To monitor and record the total amount of electrical

energy that is being consumed for the purpose ofcharging consumers through the issuance of

electricity bills .

Property of TNB

2 types of meter

Analog

Digital

METERING BOARD

TNB CUT OUT FUSE

Consumers back up protection 2 purposes:

As a measure of back up protection to the fuse in theDistribution Board and also ELCB

As mean of cutting of electrical supply to the consumerswhen required

Cutout fuse is connected to live wire and it is use tocontrol current supply. Both belong to TNB.


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Main switch


Locate at the main incoming supply of the consumers Distribution Board

The purpose is to cut all of the power supply to the consumer in the event thatany maintenance work needs to be carried out.

Connect, cut off and control the current if their any excess current.

A two terminal one way switch that contains fuse.

Main switch


19/102

Circuit breaker : ELCB


A mechanical device to connect and cutout circuit It will cut off any faulty circuit immediately Sensitive to lightning 2 types:

Earth Leakage Circuit Breaker: ELCB Miniature Circuit Breaker: MCB

ELCB


20/102

This is where distribution of electrical energy to various connected load takeplace inside the consumer premises.

It also distributes the path for the earthing and neutral wire, and acts asmeans of flowing leakage and return current respectively.

Distribution board



21/102

Miniature circuit breaker : MCB


MC

B& FUSE


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No. Of Ways Outline Dimensions (mm)

M.C.B. SIZE L W H H1

8.0 143 215 71 93

10.0 175 255 71 93

14.0 175 320 71 93

18.0 182 380 71 93

22.0 210 460 71 93

Consumer unit: 1 row : 8-22 modules



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28 434 320 71 93

Consumer unit: 2 row : 28 modules



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42 434 320 71 93

Consumer unit: 3 rows : 42 modules



25/102

RCCB AND RCBO INSIDE A DISTRIBUTION BOARD

WIRING IN DISTRIBUTION BOARD


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WIRING TO DISTRIBUTION BOARD

MAIN SWITCH AND ELCB

MAIN SWITCH

4 POLE ELCB


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28/102

Measurement rules



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29

Clause Description

R4-R5 Equipments and Control Gear

R6-R8 Fittings and Accessories

R9-R13 Conduits, trunking and cable tray

R14-R17 Cabling

R18 Final Sub-circuits

R19 Earthing

R20-R21 Ancillaries

R22 Sundries

R23-R24 Builders Work

Related SMM2 clauses



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Measurement rules



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R.2 CLASIFICATION OF WORK

a. Incoming servicesb. Standby equipmentc. Mains installation-switch gears, sub-main cables.

d. Power installatione. Lighting installationf. Heating installationg. Electrical appliancesh. Electrical work

k. Clock installation

I. Sound distribution

m. Alarm systemn. Earthing system installation

p. Lightning protection installation

q. Special services

r. Any other installation

s. Trunking, ducting and cable trays

Measurement rules



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LOCATION OF ELECTRICAL WORKS

R3 - Location of work

a. Internallyb. Externally

Measurement rules



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ELEMENT: ELECTRICAL SERVICES ubb/N/01

BIL UNIT KUANTITI

A Preamble

B

M 3.05

M 3.05

C

M 1.00

M 1.00

To Collection

All quantities in this bill are provisional quantities

subject to remeasurement upon construction of the

said item. The tenderer must allow for testing the

electrical installation and handling over of test

certificate to S.O.

Incoming Services-Externally (All Provisional)

25mm x 25mm Telekom PVC trunking from lightingarrestors run at high level and drops to computer

server.

100mm UPVC class 'D' pipe complete with long

bend extended beyond drain for entry of TNB,

incoming cable to MSB inclusive of excavation and

backfilling.

4 x 25mm pilestas (AC) cable in UPVC class 'D'

pipe (m/s) buried underground to TNB panel.

75mm x 38mm electrical trunking from meter to

DB/M3B.

Incoming Services-Internally (All Provisional)

Cadangan Membina Dan Menyiapkan Sebuah Makmal KomputerDi Sekolah Kebangsaan Sri

Selangor, Petaling Jaya, Selangor.

KETERANGAN HARGA

(RM)

JUMLAH

(RM)

BILLS OF

QUANTITI

ES FOR:

INCOMINGSERVICES


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ITEM DESCRIPTION UNIT

POWER INSTALLATION

(INTERNALLY)

Cable

A2 x 1C-2.5mm2 PVC insulated colour coded

cable as specified drawn into conduit.

M

Cl R.2.1(d)

Classification of work

Cl R.3.1(a)

Location of Work

Cl R.14.2

Generally

Cl R.15.2(a)

Cables


35/102

Measurement rules



36/102

EQUIPMENT AND CONTROL GEAR (NO)

R4 Equipment (generator, motors)

Control gear (isolator, switch fuses)

Packaged item described with a manufacturers detail.

Limiting dimension on size shall be given.

Connecting cable ends or cable tails shall be deemed to be

included with the item.

Platework and supporting steelwork Section P.

Measurement rules



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METERING BOARD

Equipment and Control Gear

Measurement rules


Manufacturers details and dimension on size


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Usually for houses and small loaded.

Situated inside building.

Including equipment such as circuit breaker and fuse

SMM2 Refer to clause R.4.1(NO.)

Distribution board



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EQUIPMENT SUPPORTS : R5

Equipment supports enumerated and described (NO)

Method of fixing given in the description with clauses R.1.5-6.

Measurement rules



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FITTING AND ACCESSORIES (N0)

R6 Fittings (clock , alarm bells)

Accessories (socket outlets)

R7 Pendant fittings NO length stages 300mm

R8 Accessories - NO (in gang)

a) rated capacity

b) type

c) no. accessories in each gang

Measurement rules



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Measurement rules



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Switch socket outlet & socket

point.

Different Types for different

capacity. SMM2 Refer to clause R.18.2

(No.)

Measurement rules



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SOCKET

Power installation



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TV Co-axial socket outlet 1 gang 15A Switched

Socket Outlet

13A 2 gangswitched socket outlet

13A 2 gang switched

socket outlet with neon

Power installation



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13A 2 gangs/s/o

13A 2 gangs/s/o with neon

Bell push switch

Telephonesocket

Power installation



46/102

Fluorescents Lights and

emergency light.

Specification refer to

manufacturer.

SMM2 Refer to clause

R.4.1(NO.)

Lighting installation



47/102

Fluorescent light

KELUAR emergency sign


48/102

Measurement rules



49/102

Fan, MATV point and

telephone point.

SMM2 Refer to clause R.6,R.22.1 (NO.)

Electrical appliance



50/102

Measurement rules



51/102

CONDUIT, TRUNKING AND CABLE TRAYS

R9.1 Conduit and fittings. (m)

a) type

b) size

c) specificationd) saddles & crampets pattern

e) nature of background

Except for final sub-circuit (measured overall conduit fittings)

e.g tees, elbows, bend, cover plates, bushes, locknuts, nipples,stopping-lugs and reducing bushes), short running lengths and

branches).

Measurement rules



52/102

PVC Conduit

Conduit, trunking and metal tray


Galvanized Iron Conduit


53/102


Classification :

a) conduits fixed to surfaces

b) conduits fixed in chases

c) conduits embedded in floor screeds

d) conduits embedded in concrete

Measurement rules



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Conduit inside the suspended ceiling




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Conduits fixed in chases

brickwall


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Drilling works to chases wiring to the brickwall




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R9.2 Special boxes, adaptable box, floor trap boxes,

purposes made boxes, rectangular junction boxes required fordrawing in cables , flameproof boxes & expansion joint

( N0 EXTRA OVER)

Measurement rules



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Munson ring

Conduit support



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Conduit Adaptor

(Isometric to PG Thread)

Coupling

Flange Coupling

Long Nipple Short Nipple

Solid Male

BendReducer

Conduit assecories



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Stainless

Steel ChainLead

WasherNeoprene

Washer Stopping Plug

Locking Ring Locknut Female BushMale Bush

Conduit assecories



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Terminal Box Angle Box Through Box

Inspection Elbow Branch Two

Way BoxTee Box

Conduit assecories


El i l d i


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Electrical conduit


M t l


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R9.3 Flexible conduits & extensible conduit (NO)

i) size ii) overall length iii) type

iv) size & type termination glands

R9.4 Components & special boxes (N0)

( for making connection of conduit in trunking )

Measurement rules


M t l


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R10.1 Trunking (m)

i) type

ii) size

iii) no & size compartment

iv) method of connecting

R10.2 Fitting (NO) and EXTRA OVER

R10.3 Connection between trunking & item of equipment &control gear use flanges and or the forming of apertures

(N0)

Measurement rules


T ki


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A rectangular metal made system

that either horizontally or vertically

fixed to wall.

A good mechanical protection.

Made from 18 gauge steel sheet. Available size:

50mm x 50mm

70mm x 100mm

150mm x 75mm

150mm x 150mm

Equipped with bend, tee, and

junction.

Trunking


T ki


66/102

Cable and trunking use for connection from main to distribution board or

distribution board to socket. Size and Material.

SMM2 Refer to clause R.15, R.9 (M)

Trunking


T ki fitti


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90r Gusset Bend

Front Lid(Traditional)

90r Gusset Bend

Inside Lid

(Traditional)

45r BendOutside Lid

45r Bend

Front Lid

90r Gusset Bend

Front Lid45r Bend

Inside Lid

Trunking fittings


Measurement rules


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R10.4 Pin racks (NO)

i) type; and ii) size

R11.1 Busbar Trunking (m)

Clauses R.10.1

a) type; b) width; c) rated capacity; and

d) method of capacity

R11.2 Tap-off units, feeder units, fire barries & the like (NO)

Measurement rules


Measurement rules


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R12.1 Trays (m)

i) type; ii) width; and iii) method of jointing

R12.2 Stools (NO)


R12.3 Fitting (NO and EXTRA OVER )

Measurement rules


Cable tray


70/102

Cable tray


Measurement rules


71/102

Measurement rules


Measurement rules


72/102

CABLES

R15.1 Cables (m)

measured as the net length of the conduit, trunking or tray.

other cable measured as fix (without any allowance for sag)between boxes, equipment control gear, fittings, accessories

etc.

except for final sub-circuits.

Measurement rules



73/102

The conductors used in domestic installations are called cables andconsist of a conductor of low resistance such as copper and aluminiumsurrounded by an insulator of high resistance such as rubber andplastic.

Cable sizes are known by the nominal cross sectional area of theconductor and up to 2.5mm2 are usually of one strand.

Flexible PVC insulated cord

Types of wire


74/102

Types of wire


Measurement rules


75/102

Cables

R15.2 Cables (m)

i) type ii) size iii) classification

CLASSIFICATION

a) drawn into conduits or ducts

b) laid or drawn into trunking

c) laid or drawn into trunking and laced into ciucuit

d) fixed to surfaces

e) wrapped around pipework

f) laid in trenches

g) fixed to insulators in overhead lines

h) suspended from catenary cables

R15.4 Cable joints (NO)

R15.5 Line taps (NO)

i) size ii) type of cable iii) shrouds (type)

Measurement rules


Cable classification


76/102

Underground cable Fixed to wall Fixed in ceiling

Cable classification


Measurement rules


77/102

CABLE

R15.6 Cable termination glands (NO)

i) type & size of cable ii) type of gland

R15.7 Conduit: boxes, adaptable boxes & the like used with

cable termination glands (NO - separately)

i) type ii) size of cable iii) joint-boxes, sealing boxes (type)

R16.1 Components for supporting cable given in the descriptionof the cable stating type and spacing.

Alternatively, components of combination system (NO)

Measurement rules


Measurement rules


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CABLE

R17 Connections to public mains, making good public highway and

other work which may only carried out by Public Undertaking

or Local Authority PROVISIONAL SUM

Measurement rules


Measurement rules


79/102

FINAL SUB-CIRCUITS

R18.1 Distribution sheets and drawing showing layout shall be given.

R18.2 Points (NO)

i) cable & conduit installations

ii) ampere rating

iii) classification

CLASSIFICATION

a) Lighting points: one way or two way

b) Socket or switch socket pointsc) Immersion heater points, cooker outlet points etc.

Measurement rules


Measurement rules


80/102

Measurement rules


Measurement rules


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EARTHING

R19.1 Tapes for earthing (m)

i) size; ii) type; andiii) type & spacing of saddles, cleats, clip holdfasts & the like

R19.2 Conductor connections & junctions (NO)


R19.4 Test clamps (NO)

i) type ii) size; and iii) method of connecting

Measurement rules


Earthing installation


82/102

Typical earth-electrode pit

Earthing using cooper stripEarthing & Bonding requirement

Earthing installation



83/102

Earth electrode pit

Cooper strip

Measurement rules


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EARTHING

R19.5 Earth electrodes (NO)

i) type ii) size; and iii) driving electrode into ground

R19.6 Air termination points (NO)

i) type ii) size; and iii) method of connecting


Lightning protection installation


85/102

Air Termination (NO.)

Copper Tape Roof Conductor. (M)

SMM2 Refer to clause R.19.6, R.22.2, R.19.

Lightning protection installation


Measurement rules


86/102

ANCILLARIES

R20 Loose keys, tools, spares and the like (NO separately)

i) type; and ii) quantity

Rack for holding tools (NO)


Measurement rules


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SUNDRIES

R22.1 Marking the position of holes, mortice, chases & the like

(ITEM)

R22.2 General earth bonding & earthing (ITEM)

R22.3 Disconnecting, setting aside & refixing equipment (ITEM)

R22.4 Temporary operating each installation (ITEM)

R22.5 Testing each installation (ITEM)R22.6 Preparing plans or diagrams of the installations (ITEM)



88/102


Summary of

measurement rules


89/102

ITEM METHOD OF MEASUREMENT UNIT CLAUSE

1) Main Installation

sub main cables stating the type and size m R.2.1.c

meter panel shall be described with no R.4.2

manufacture's detail

specification

distribution board ditto no

cables stating the type, size and the m R.15.2

location ( net length )

conduits stating the type, external size m R.9.1

and the location

sundries

mark the holes & etc. stating the nature of works & item R.22.1

relevant particulars

general bonding each installation item R.22.2

testing ditto and stating particulars of item R.22.5

any special insurance cover

required by Employer

SUMMARY OF MEASUREMENT RULES



90/102


2) PowerInstallation

fittings & accessories

socket unless stated all shall be enumerated no R.6.1




and the location

final sub-circuit stating the ampere rating no R.18.2

sundries



general bonding each installation item R.22.2testing ditto and stating particulars of item R.22.5






91/102


3) Lighting Installation


switch unless stated all shall be enumerated no R.6.1




and the location


sundries


relevant particularsgeneral bonding each installation item R.22.2







92/102


4) Electrical Appliances


switch unless stated all shall be enumerated no R.6.1




and the location


sundries



general bonding each installation item R.22.2







93/102


5) Earthing System

Installation

cables given in accordance with clause R.15 m R.19.1

copper tape stating the type & size m R.19.1

conductor connection stating the type & size no R.19.2

test clamps ditto & method of connecting no R.19.4earth electrodes ditto & driving electrodes into no R.19.5

groundshall be given

air termination stating the type & size & method of no R.19.6

connection

sundries



testing each installation and stating item R.22.5

particulars ofany special insurance

cover required by Employer




94/102


6) Builder's Work

excavating trenches for cables and pipe ducts n. exc. m R.24.1

55mm nominal size refer to clause

D.12.9 & exc. 55mm refer to clause

V.2cable covers stating the type & size m R.24.2



95/102


Taking off list

Taking off list


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Preamble

General notes

Main installation

Meter panel (no)

Main Switch Board (no)

Distribution Board (no) Main & sub main cabling (m)

Conduit and trunking (m)

Sundries (no)

Testing (item)

Power installation

Fittings and accessories

Socket (no)

Point (no)

Cables (m)

Conduits (m)

Final sub circuit (no) Sundries

Mark the holes (item)

General earth bonding (item)

Testing (item)


Taking off list


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Lighting installation Fittings & accessories Swicth (no) Point (no)

Final sub-circuit (no)

Sundries Mark the holes (item) General earth bonding (item) Testing (item)

Lightning installation Copper tape (no) Test clamps (no) Air termination (no) Earth chamber(no)

SundriesMark the holes (item) Testing (item)

Builders work Excavation trenches (m)


TAKING OFF LISTS


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TAKING OFF LISTSDOMESTIC HOUSING SINGLEPHASE

1.Main Installation- sub main cables m

- meter panel no

- distribution board no

- cables m- conduits no

- sundries

= mark holes item

= general bonding item

= testing item

TAKING OFF LISTS


99/102

2. Power Installation- fitting & accessories

= socket no

- cables m

-conduits m

- final sub-circuit no

- sundries

= mark holes item


= testing item


TAKING OFF LISTS


100/102

3. Lighting Installation- fittings & accessories

= switch no

- cables m- conduits m

- final sub circuit no

- sundries

= mark holes item


= testing item


TAKING OFF LISTS


101/102

4. Electrical Appliances- fitting & accessories

= switch no

- cables m

- conduits m- final sub circuit no

- sundries

= mark holes item


= testing item


TAKING OFF LISTS


102/102

5. Earthing System Installation- cables m

- copper tape no

- test clamps no- conductor connection no

- earth electrodes no

- air termination no

- sundries

= mark holes item

= testing item

O S SDOMESTIC HOUSING SINGLEPHASE

Documents

Construction Measurement III Week 4 Electrical Single Phase