2021-11-09
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Exercise 2. Answer the questions
1. How many types of plugs are there nowadays?
2. Which plug type is used in Russia?
3. Why are type A and B plugs potentially dangerous?
4. Why is type F plug called Schuko?
5. Why are type C sockets not commonly used in new buildings?
6. Which plug type is safer: C or F? Why?
Unit 2. Types and characteristics of electrical wires Vocabulary
bare wire голый провод
circuit breaker panel панель прерывателей цепи
conduit труба для электропроводки
cord шнур
flame-resistant огнестойкий
gauge калибр, сортамент
ground wire заземляющий провод
hardwired соединенный проводами
heat resistance теплостойкость
hot wire провод под напряжением
main feed магистральная линия (питания)
junction box распределительная коробка
service drop ответвление к потребителю
sheathing оболочка
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single strand wire одножильный провод
smoke detector датчик дыма
solid wire одножильный провод
stranded wire многожильный провод
wiring прокладка электрических проводов; электропроводка
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The terms wire and cable are often
used to describe the same thing, but they are actually quite different. Wire is a single electrical conductor, whereas a cable is a group of wires swathed in sheathing.
Size of wires
Each application requires a certain wire size for installation, and the right size for a specific application is determined by the wire gauge. Com- mon wire sizes are 10, 12 and 14 – a higher number means a smaller wire size, and affects the amount of power it can carry. For example, a low- voltage lamp cord with 10 Amps will require 18-gauge wire, while service panels or subpanels with 100 Amps will require 2-gauge wire.
