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Question
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.
(c) How are the two bulbs joined : in series or in parallel ?
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.
(c) How are the two bulbs joined : in series or in parallel ?
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Solution
(a)
(b)
Wire no. Wire name Colour (Old convention) Colour (New convention) 1 Neutral wire Black Light blue 2 Earth wire Green Green or yellow 3 Live wire Red Brown
(c) The bulbs are joined in parallel.
(a)
(b)
| Wire no. | Wire name | Colour (Old convention) | Colour (New convention) |
| 1 | Neutral wire | Black | Light blue |
| 2 | Earth wire | Green | Green or yellow |
| 3 | Live wire | Red | Brown |
(c) The bulbs are joined in parallel.
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