Page 18 - Electrician - TT (Volume 1)

ELECTRICIAN - CITS ELECTRICIAN - CITS

Mandatory signs

Warning signs

Fig 6 Fig 7

Fire - Types - Extinguishers

Objectives: At the end of this lesson you shall be able to:
• state the effects of a fire break out and causes of fire in a workshop
• distinguish the different types of fire extinguishers
• state the classification of fires and basic ways for extingushing the fire
• determine the correct type of fire extinguisher to be used based on the class of fire
• describe the general procedure to be adopted in the event of fire
• state the method of operation of fire extinguisher and extinguishing of fire.

Fire : Is it possible to prevent fire? Yes, fire can be prevented by eliminating anyone of the three factors that
cauAses fire.

The following are the three factors that must be present in combination for a fire to continue to burn. (Fig 1)
Fig 1

Fuel: Any substance, liquid, solid or gas will burn, if there is oxygen and high enough temperatures.
Heat: Every fuel will begin to burn at a certain temperature. It varies and depends on the fuel. Solids and liquids
give off vapour when heated, and it is this vapour which ignites.

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CITS : Power - Electrician & Wireman - Lesson 1- 4 CITS : Power - Electrician & Wireman - Lesson 1- 4