1.

(a) State the colour of (i) live wire, (ii) neutral wire, (iii) earth wire according to international convention (b) State the position of (i) earth pin, (ii) live pin and (iii) neutral pin in an electric plug. (c) Why is the earth terminal of a plug made (i) thicker, (ii) longer

Answer»

(a) The colour of 

1. Live wire —– Brown 

2. Neutral wire —– Light Blue . 

3. Earth wire —– geen or Yellow 

(b) Position of

1. Earth pin —– is Long and Thicker so that it should not enter live or neutral cylinder of socket. 

2. Live pin —– L is on the right when earth pin goes into E, live pingoes into L. 

3. Neutral-pin —– N is on the left.When earth pin goes into E, live wire in L automatically neutral goes into N. 

(c) Earth-pin is made thicker, so that it should not enter other cylinder of socket and helps in putting right pin in right place. 

Longer —– So that earth connection is done first. This ensure the user will not get a shock.



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