INTRODUCTION

Electrical component is the component that is needed to generate, transmit,

distribute and consume the electric power. These elements consist of a few devices

such as inductor, resistor, capacitor, conductor, circuit breakers and timer. Such fittings

are also collectively known as accessories since they are seen as the accessory to the

wiring which is the main substance of the wiring installation.

Familiarity with electrical wiring accessories is an important provision beside an

awareness of and strict adherence to the provisions of the National Electrical Code

(NEC). Beside that, there also a regulation which are embedded for safeguard and

guarantee which is known as the IEE Wiring Regulations (BS 7671) that is basically a

set of recommendation dealing with the safe design, construction, inspection and testing

of low voltage installation of the wiring accessories.

OBJECTIVE

1. To determine the specific purpose and function of each electrical accessories

such as copper bush, inspection tee, trunking jointer, copper bridging, terminal

box and etc.

2. To review and discuss all the functions of electrical wiring accessories and

identify the types of electrical devices in building.

3. To find out schematic diagram of fluorescent lamp circuit and its function.

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LITERATURE REVIEW

A. WIRE COVER OR INSULATOR

Electricity is convey through metal conductor, thus to prevent it from leaking safety

precaution should be taken. The wire must be covered from any contact with other

material or thing especially us, human being as it can be kick in the bucket if

protection is not done so.

WIRING ACCESSORIES FUNCTION

1.

TRUNKING JOINTER

To put a large number of cables to run

together (Barrie Rigby, 2001)

2.

BAR SADDLE

To secure multiple runs of wire.

To fix tough rubber- sheath and PVC0 sheath

(Henry A. Miller, 1985)

3.

CONDUIT

To protect PVC insulated cable

( F. Porges, 1989)

4.

COPPER BUSH

To provide a smooth entry into the box and

avoid sharp corners which cause damage in

cable insulation.

(F. Porges, 1989)

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5.

RUNNING COUPLER

Grip the conduit and bite it into the metal

(F. Porges, 1985)

6.

GI LONG BEND

Fittings that are created for conduit do so that

the conduit can bend into the required

directions.

7.

GI FLEXIBLE ADAPTER

Device that is inserted into a socket outlet to

receive one or more plugs but it may have a

different corners (K.L Raina,1995)

8.

ELBOW

A short radius length of tubing for connecting

two length of conduits at right angle or 90º

(K.L Raina, 1995)

9.

COPPER BRIDGING

To measure electric capacity by null method

and the material that is made out of copper,

(K.G Jackson, 1981)

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INSPECTION TEE

To change conduit direction

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B. PVC

PVC or polyvinyl chloride is a common material that is used for cable conductor.

It is used for some of larger power and sub- main cables which may tending to

supersede paper insulated cables (F.Porges, 1989)

PVC also can be mix with other material; common material which often mixed

with PVC is paper insulated cables (which will be described as PVC Insulated Steel

Armoured). For example, Single Core Paper insulated lead sheathed PVC is

abbreviated as PILSPVC and PVC that is insulated with Steel Wire Armoured PVC

Sheathed is abbreviated as PILSSWAPVC cable.

PVC also has different sizes according to their cross- sectional area which have

different current carrying capacity. The classifications of PVC are:

a) 1.5 mm e) 10mm

b) 2.5mm f) 25mm

c) 4mm g) 35mm

d) 6mm h) 60mm

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C. BOX

WIRING ACCESSORIES FUNCTION

1.

TERMINAL BOX

2 WAY BOX

4 WAY BOX

It is an enclosure which includes, mounts,

and protects one or more terminal boards; it

may include a cover such accessories as

mounting hardware, brackets, locks and

conduit fittings.

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2

3 x 3 CONCEAL BOX

3 x 6 CONCEAL BOX

M/C CONCEAL BOX (3 x 6)

It is a place to install the wire from the

distribution board.

It is the part of the plate that used to

plug in the electrical equipment.

D. SWITCH AND SOCKET OUTLET

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WIRING ACCESSORIES NAME AND DESCRIPTION FUNCTION

3.

1 GANG M/C SWITCH

Suitable for large building.

It can break an

electrical circuit,

interrupting the

current or diverting it

from on.

Sockets are

equipment that we

used to plug in the

electrical equipment

to another conductor.

4.

DOUBLE 13 A SOCKET

OUTLET

1 GANG M/C SOCKET

It contains 13A fuse and it is

used for domestic used

such as housing wiring.

Type of socket:

- 1 gang m/c socket

GANG METAL CLAD

Made from metal and

usually used for

industrial purposed.

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SOCKET

E. FLUORESCENT LAMP CIRCUIT

Fluorescent Lamp is consists of a long glass of tube that contain the mixture of mercury

vapour and argon gas at pressure if 2 to 5 mm mercury.

This circuit is including:

CIRCUIT COMPONENT FUNCTION

1. Starter Switch

2. Electrode

3. Argon gas When the electricity is supplied to the circuit, it will

discharge the argon gas in the tube that will increase

the temperature which enable it to exite the mercury

vapour in the tube

4. Mercury It will produce the short wave-ultraviolet light when it

is get excited

4. Phosphor Coating The material which will fluoresce or shine due to short

wave- ultraviolet and produce visible light.

5. Ballast To heat the filament (electrode) when power is

applied.

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PROBLEM RELATED

1. Improper Wiring Method

The electrical wiring method in this picture is clearly

one example of improper wiring method that can bring

hazardous and harmful to the people living nearby. There is

absolutely no insulator or any wiring cover to cover the wire.

This situation can be worst if there is lightning struck at the

wire or even huge flood occur at the place. Furthermore, I

doubt there are no lightning arrestor installed their. In

addition, I think that the authority at that area should look into

this matter and provide good safety for the people there. (Delhi, India)

2. No periodic maintenance

No periodic maintenance is one of the

causes that may bring problem to the wiring

component in the building. Beside that, it also

can bring damage to the building or to human

being due to electrical fire or injury to persons

by an electric shock. Therefore, it is crucial for

us to conduct periodic maintenance constantly

to ensure that the wiring system stays

according to the code compliant. (Poor Maintenance)

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CONCLUSION AND RECOMMENDATION

In brief, it is crucial to learn the electrical accessories in electrical components

and their functions. By that, we will enable to know more how the particular system

operates and in case of any malfunction we will know the source of the problem.

Nevertheless, perhaps the problem is too complicated or complex, we might have to ask

for the expert help. But, in cases where the problems are minimal we as civil engineer

can solve it as we have sufficient knowledge of it.

For some electrical wiring and component, not all of the same types of electrical

accessories can be used. For instance if the place requires the conduit that can be

bend, long bend should be used since it can be bend into the required condition.

Another example is that for the component which uses a lot of cables, trunk joint should

be used instead of conduit because it can cater more wires as compare to the normal

metal conduit.

In short, it is also important for us to understand more about the function of

electrical wiring accessories in the building.

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REFERENCES

1) Barrie Rigby, “Design of Electrical Services for Building”, Fourth Edition, Spon

Press,(2001), 270 Madison Ave, New York.

2) Henry A Miller, “Practical Wiring Volume 1 in SI Units”, Pergamon Press,

(1985),Oxfod, New York.

3) F.Porges,”The Design of Electrical Services for Building”, Third Edition, Spun

Press, (1989), Great Britain.

4) K.L Raina, “Dictionary of Electrical Engineering” Cresent News,Kuala Lumpur.

5) http://www.ibuonhe.com/productdetail/channel-inspection-tee .

6) http://en.wikipedia.org/wiki/Fluorescent_lamp .

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