The diagram in Fig. 9.27 shows a three-pin socket marked as 1, 2 and 3.

(a) Identify and write live (L), neutral (N) and earth (E) against the correct number.

(b) To which part of the appliance is the terminal 1 connected?

(c) To which wire joined to 2 or 3, is the fuse connected and why?

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Solution

(a) 1 – Earth, 2 – Neutral, 3 – Live

(b) Terminal 1 is connected to the outer metallic case of the appliance.

(c) The fuse is connected to live wire joined to 3 so that in case of the excessive flow of current fuse melts first and breaks down the circuit to protect appliances.

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Q. The diagram in figure shows a
three pin socket marked as 1,2 and 3

(a) Identify and write live (L),
neutral (N) and earth (E)
against the correct number.
(b) To which part of the appliance
is terminal 1 connected?
(c) To which wire joined to 2 or 3,
is the fuse connected?

Q. The diagram in Fig. shows a three-pin socket marked as 1, 2 and 3. To which wire is the fuse connected ?

Q. The diagram shows a three-pin socket marked as 1, 2 and 3. Identify live (L), neutral (N) and earth (E) against the correct number.

Fig. 9.29 below shows two bulbs with switches and fuse connected to the mains through a three pin socket by means of a three wires cable.

Fig. 9.29

(a) Label each component - bulb, switch, fuse and socket.

(b) Name and state the colour of insulation of each wire 1, 2 and 3.

Why is the earth pin thicker and longer than the live and the neutral pins? What is the advantage of earth wire connection in domestic appliances? [3 MARKS]

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The diagram in Fig. 9.27 shows a three-pin socket marked as 1, 2 and 3. (a) Identify and write live (L), neutral (N) and earth (E) against the correct number. (b) To which part of the appliance is the terminal 1 connected? (c) To which wire joined to 2 or 3, is the fuse connected and why?

(a) 1 – Earth, 2 – Neutral, 3 – Live (b) Terminal 1 is connected to the outer metallic case of the appliance. (c) The fuse is connected to live wire joined to 3 so that in case of the excessive flow of current fuse melts first and breaks down the circuit to protect appliances.

The diagram in Fig. 9.27 shows a three-pin socket marked as 1, 2 and 3.

(a) Identify and write live (L), neutral (N) and earth (E) against the correct number.

(b) To which part of the appliance is the terminal 1 connected?

(c) To which wire joined to 2 or 3, is the fuse connected and why?

(a) 1 – Earth, 2 – Neutral, 3 – Live

(b) Terminal 1 is connected to the outer metallic case of the appliance.

(c) The fuse is connected to live wire joined to 3 so that in case of the excessive flow of current fuse melts first and breaks down the circuit to protect appliances.