Electrical installations and
wiring systems
Ch 14
279
Unit Installation (Buildings and Structures) Outcomes 2–4
Underpinning knowledge: when you have completed this chapter you should able to:
● state the supply system earthing arrangements
● state the different types electrical installation, components and functions
● state the different types wiring enclosure and the factors that determine the choice wiring system
● state the special arrangements required for:
– locations containing bath shower
– construction and demolition sites
– agricultural and horticultural premises
– caravans and camping parks
● state the devices for fixing equipment surfaces
● carry out calculations determine cable size
● state the requirements for testing electrical installations
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w sy
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6 6
2 2
C1
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L1 C1
2
C3
4
5
6
To phase supply
