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Step 6

Fuses usually have four different ratings: ЗА, 5A, 10A, I3A.
Make statements about the electrical devices in Step 5 like this
example. Use a I3A fuse with an electrical kettle because it draws
a current of 10A.

Step 7

1. Calculate the resistance of the electrical devices in Step 5.
2. Find out the power rating of other electrical devices, for
example, an electric cooker, washing machine, radio, etc.

Language Point
240V - two hundred and forty volts
50A - fifty amps.

LESSON 4

FUSES

Starter: Any electrical circuit usually has one or more fuses in it.
Why? What would happen if there were no fuses?
Input: Safety with Fuses.

If an appliance such as a light or a heater stops working, it is
probably because the fuse has blown. There are 3 main types of
fuse in use today - cartridge, rewirable and the most modern type,
miniature circuit breakers. Some appliances have their own fuses
(usually in the plug), so this should be checked first. Otherwise,
check whether the main fuse has gone. The main fuses are
normally in a switch box or fuse box at the point where the main
electricity supply cable enters the building usually near the front
door. Before checking these fuses, turn off the main switch.
Remove and examine the fuses one by one. Which the cartridge

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