Page 114 - Electrician - TT (Volume 1)

ELECTRICIAN - CITS

B.I.S. Symbols used for electrical accessories

Objectives: At the end of this lesson you shall be able to:
• interpret the various BIS symbols used in electrical wiring diagrams.

In electrotechnical engineering the symbols are used in layouts and wiring circuits to represent the electrical parts
or the function of the circuit.
Since the drawing of the actual device is very laborious and would be drawn by each person differently, standardised
symbols are used. With the help of the symbols, an electric circuit can be represented easily and can be described
precisely as well.
A few examples of standard symbols recommended by B.I.S. 2032 (different parts) used for wiring are given here.

B.I.S. SYMBOLS FOR WIRING SCHEMES

Symbols used in the circuit Symbols used in
Sl. No. Description
diagram layout

1 One-way switch, single pole

2 One-way switch, two poles

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CITS : Power - Electrician & Wireman - Lesson 20-25 CITS : Power - Electrician & Wireman - Lesson 20-25