INTRODUCTION
Dear students in last lesson, we learned about wiring tools, their specification and their uses. Whenever we want to start electrical installation work at houses, shops, malls, small scale industries & big industries we need electrical wiring drawing. After discussion with customer, electrical engineer makes drawing while uses ISI symbols. He start work at site, he uses electrical plan which is finally designed by engineer. Symbols are represented by Bureau of Indian Standard (B.I.S.) which are recognized. Actually, there are many electrical symbols. Now, we learn symbols which are recommended in our syllabus.
OBJECTIVES
After going this lesson you will be able to:
- draw the electrical/graphical symbol.
- explain how these symbols are used.
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