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INTRODUCTION

SESSION 1: IDENTIFYING AND SELECTING THE

W

IRING MATERIALS AND COMPONENTS

Wiring materials

their properties: &RQGXFWLQJPDWHULDOV ,QVXODWLQJPDWHULDOV

6HPLFRQGXFWRUPDWHULDOV

Electrical Wiring

Components and

Accessories

3

Fig. 3.1 Wiring components

Unit-3 Electrical Wiring Components and Accessories.indd 4217-Mar-21 3:04:06 PM elECTRICAL WIRING COMPONENTS AND ACCESSORIES 43
(a) Copper ,WLVXVHGLQZLULQJDQGFDEOHPDNLQJ (b) Aluminium (a) Switch

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7KHUHDUHYDULRXVVZLWFKHVVXFKDV

Surface switch:

2QHZD\VZLWFK

7ZRZD\VZLWFK

,QWHUPHGLDWHVZLWFK

Fig. 3.2 Copper wire

Fig. 3.4 Sockets

Fig. 3.3 Aluminium wire

Unit-3 Electrical Wiring Components and Accessories.indd 4311-06-2019 12:56:23 caBle JoInter — ELECTRICAL POWER SYSTEM — CLASS XI 44

One-way switch:

Two-way switch:

Intermediate switch:

(i) Flush switch: (ii) Bed switch: (b) Holders

3HQGDQWKROGHU)LJ

%DWWHQKROGHU)LJ (c) Ceiling rose (d) Socket outlet/plug (e) Main switch

Fig. 3.6 Two-way switch

Fig. 3.8 Flush Switch

Fig. 3.9 Bed switch

Fig. 3.12 Ceiling rose

Fig. 3.10 Pendant holder

Fig. 3.13 Socket

Fig. 3.11 Batten holder

Fig 3.7 Intermediate switch

Fig. 3.5 One-way switch

Fig. 3.14 Main switch/

Main MCB

11-06-2019 12:56:30

elECTRICAL WIRING COMPONENTS AND ACCESSORIES f) pVc casing-capping wiring ZLUH

FDVLQJHQFORVXUHVPDGHXSRISODVWLF

FDSSLQJPDGHXSRISODVWLF

7 -RLQWV 9,5 9XOFDQLVHG ,QGLDQ 5XEEHU RU

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advantages of casing-capping wiring

Easy to install

disadvantages of pVc casing-capping wiring

Costly

Miniature Circuit Breaker (MCB)

home electrical panels

Fig. 3.15 PVC

casing-capping accessories

Fig. 3.16 PVC

casing-capping bend

Fig. 3.17 MCB Distribution

Box

11-06-2019 12:56:32

caBle JoInter — ELECTRICAL POWER SYSTEM — CLASS XI lights

Industrial applications

heaters

Conduit Wiring

&ODVV $ FRQGXLW 7KLQ OD\HUHG VWHHO VKHHW RI &ODVV%FRQGXLW7KLFNVWHHOVKHHWRIKLJKJDXJH

Fig. 3.18 Conduit wiring

11-06-2019 12:56:32

elECTRICAL WIRING COMPONENTS AND ACCESSORIES clip

Advantages of conduit wiring

Better appearance

Disadvantages of conduit wiring

Concealed Wiring

Advantages of concealed wiring

Better appearance

Disadvantages of concealed wiring

Fig. 3.19 Conduit wiring components

11-06-2019 12:56:33

caBle JoInter — ELECTRICAL POWER SYSTEM — CLASS XI a. Fill in the blanks

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2SHQ ZLULQJ LV DOVR NQRZQ DV BBBBBBBBBBBBBBBBBBBBZLULQJ

B. State whether the following statements are True or False

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6ZLWFKHVDUHPDGHRIFRQGXFWLQJPDWHULDO

c. Multiple choice questions &RQFHDOHGZLULQJLVLPPXQHWRBBBBBBBBBBBB DKXPLGLW\ EKHDW FOLJKW GGXVW table 3.1 ac power circuit wiring colour codes

FunctionLabel New colourOld colour

P GGreen

Gray L L1 L2

L3Blue

Check Your Progresscolour code

Unit-3 Electrical Wiring Components and Accessories.indd 4811-06-2019 12:56:33 elECTRICAL WIRING COMPONENTS AND ACCESSORIES

3HQGDQWKROGHULVXVHGIRUBBBBBBBBBBBBBBBB

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