ch - 6.3 additional devicesxxx
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Additional devices
Lamp HolderCeiling Rose
Soket Alur KeluarSuis
Penyambung dan PenggandingKotak sambungan
PenyesuaiKabel
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Definition – devices that is use in electrical wiring but not using current such as ;ros ceiling rose,lamp holder,box connection,outlet socket,penyesuai,connector,pengganding,cct breaker,palam
except lamp, motor, fan etc.
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1. Ceiling Rose
•. Definition – The place forending
point
•. i.e. flexible cable connected tothe load; lamp & fan.
•. 3 types – 2 plat, 3 plat & 4plat
Made of plastic @ bakelit.
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IEE Regulation :-1.553-19 Ros siling tidak dibenarkan utk kegunaan di
pemasangan yg lebih drpd 250V.2. 553-20 Bersama2 dgn ros siling tak boleh dipsngkan
lebih drpd satu keluaran kord mudah lentur kecuali
kalau ros siling itu dibuat khas utk berbilang keluaran.
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Lamp Holder
Definition – Hold the lamp whichmade easy installation of lampto the power supply.
4 types of lamp holder :-
a. Pangkal kilas, skru Edison,skru Goliath & pin.
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IEE Regulation :-1. 553-15 Lamp holder berfilamen hanya digunakan utklitar yg dibekalkan oleh voltan tidak lebih 250V.
2. 553-14 Lamp holder tidak boleh disambung kemana2litar yg mempunyai nilai kadaran pelindung arus lebih ygmelebihi nilai yg terdapat dlm Jadual.
3. 533.18 Pd sentuhan tengah samada lamp holder Skru
Edison type @ pangkal kilas yg disambung ke bekalan ygmempunyai litar sistem TN @ TT, sentuhan luar @sentuhan berskru itu hendaklah disambungkan kepengalir neutral.
4. 471-38 Di bilik yg mempunyai kolah tetap @ airpancut, bhgn pemegang lampu hendaklah berada pd
jarak 2.5m dr kolah @ air pancut itu iaitu diselebungkandgn bhn penebat. Jenis pangkal kilas (B22) hendaklahdipasangbersama pelindung pengadang mengikut BS5042. Sbg pilihan lampu yg berpenutup sepenuhnya boleh
juga digunakan.
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Pemeganglampu
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Outlet Socket (Soket Alur Keluar)
Female connection point that is assemble tothe fix intallation.Outlet socket able to receive AC Cordconnect to equipment.
Outlet rate based on British Standard (BS) –2A, 5A,13A, 15A & 30A (common use) & 16A,32A, 63A ( industry).
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Structure
Outlet socket base are made off tembikar,
kaca bakelit, plastik @ strong insulatedmaterial.Socket gives 2, 3 & 4 connection point.
Types of O/S (BS) Nominal CurrentBS 1363 13ABS 546 2A, 5A, 15A, 30ABS196 5A, 15A, 30ABS 1778 15ABS 4343 16A, 32A, 63A,
125A
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SwitchMechanical control (Open & close) for electrical
circuit in mechanical method either direct contact@ via intermediate rope @ tombol pemetik @tangkai at the nominal current cct.
Should be able to operate in abnormal conSuisjuga hendaklah mampu menahan keadaantertentu misalnya arus lebih akibat beban ygberlebihan @ litar pintas.
Terdpt berbagai2 bentuk & ragam suis antaranyatermasuklah suis satu hala, perantaraan, 2kutub, suis 2 kutub 2 hala & suis 3 kutub. Suis2ini dibuat dlm pelbagai rupa & kadaran arusmengikut kehendak penggunaannya.
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Switch Types
Based on :-
i. Pemetik @ tangkai
ii. Internal operation
iii. Function
iv. Installation @ construction
a. Tangkai @ Pemetik
i. Tangkai togol – D.C. current
ii. Bertali – For lamp control @ equipment that aredanger to operate in direct way @ too far for user toreach.
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iii. Button switch – For immediateoperation. i.e. motor control, bus bell ring
iv. Tombol – operate in rotating way i.e.
fan speed controller.
vi. Key – security; car @ to avoidinterruption in electrical installation work.
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b. Function – basic; open & close cct.
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To control 1 @ more lamp in lamp final cct @
regulator ceiling fan. Switch connected to Life.To control lamp @ load that in 2 separated location.Optional switch for 2 cct path.
To control lamp @ load from 3 @ more location.
To open 2 pole supply cct. i.e main switch for user control.
To give cct track selection ability.
Same as no. 4. The different – have 2 switch.
To open 3 pole supply cct. i.e. open supply cct for 3 phase motor.
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c. Internal Operation
- The switch connection method; fast, slow, direct etc.
- Operating different determine the supply type & load that can be
use by the switch.1. A.C. Switch
- For lamp control cct, it use fast connection & slow breaker type.
- The switch gap - small.
- Slow breaker…small gap…??? Avoid spark.
- Cth : Suis celah mikro (6 mm – gap)
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2. D.C. Switch
- A.C. switch & D.C. switch – different – why??
- Switch operate in mechanical way between fix & movingconnector (using spring)
- D.C. – constant – receive max.current.
- A.C. – not constant; current increase follow the freq.
- Need to use fast connection & fast breaker
switch type.
- Example : Suis Bilah Pisau
- Nowadays, it’s use only in lab for battery @ low AC voltage.
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3. Load Inductance Switch
- Same requirement with A.C. - fast
connection & slow breaker type.- If use fast breaker – high self inductance
voltage occur because of decrease of flux &
pemotongan flux when the switch is break infast way.
- To avoid tindak balas aruhan diri that willfeed back in user load cct.
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Installation @ construction
- Made in variety structure depend to the
location of installation location.i.e surface switch for surface wiring.
half surface switch for surface wiring.
water resistance switch
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Selection Switch
Arus ketahanan suis hendaklah sekurang2nya sama
dgn arus litar.Jika suis biasa hendak digunakan sbg suis pengawallampu nyahcas, suis itu mesti mempunyai kadar 2kali ganda arus biasa yg diguna bagi litar itu.
Suis hendaklah sesuai dgn tempat, pendawaian & keadaan suhu sekeliling ia hendak dipasang.
Suis hendaklah sesuai utk menjalankan sesuatu
fungsi & bentuk kawalan yg dikehendaki.
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Connector & coupling for cable
Connection box – cable connection box.
Use when cct to be divided into branch.i.e. Electrical power base from one house to theothers.
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Adjuster
Power output to lamp @ outlet socket.
It’s consist of 2,3,4 @ 5 outlet depand to the type & structure.
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