Electrical Installation Competences

Part 1 Introductory mathematics: algebraic equations; factorizing; removing brackets; substitution; index notation; numbers in stardard form; simultaneous equations; transposition of formulae; square root and cube root signs; scientific calculator; trigonometrical ratios; useful hints; ratios of common angles; complementary angles; relations between ratios; solution of triangles; sine and cosine rules. Part 2 Alternating current circuits: the sine wave; circuit components; resistance; inductance; capacitance in series; resistance and inductance in parallel; resistance and capacitance in parallel; power factor; three-phase supplies; balanced loads, power calculations; instrument connections using current and voltage transformers, cathode ray oscilloscope; digital and analogue instruments. Part 3 Electric motors and starters: basic principles; output power, efficiency; cage induction motor; rotor operation; wound rotor induction motor; application; single-phase induction motor; universal motor; motor starters; direct-on-line; star delta; auto-transformer starter; rotor resistance starter; motor protection; power factor improvement equipment; speed control. Part 4 Elements of lighting design: light; terminology; lumen method calculation; lighting systems; types of lamp; control gear; lamp faults.