Maharashtra BoardEnglish MediumSTD 9ScienceCurrent Electricity3 Marks
Question
explain the statement : In a domestic circuit colour code is followed while setting up electrical wiring.
✓
Answer
The electricity in our homes is brought through the main conducting cable either from the electric pole or from underground cables.
Usually, there are three wires in the cable.
(a) Live wire which brings in the current. It has a red or brown insulation.
(b) Neutral wire through which the current returns. It is blue or black.
(c) Earth wire is of yellow or green colour. This is connected to a metal plate buried deep underground near the house and is for safety purposes.
In India, the voltage difference between the live and neutral wires is about 220 V.
Live and neutral wires are connected to the electric meter through a fuse.
They are connected through a main switch, to all the conducting wires inside the home so as to provide electricity to every room.
In each separate circuit, various electrical appliances are connected between the live and neutral wires.
The different appliances are connected in parallel and the potential difference across every appliance is the same.
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