Electric work 02 -Electrical cables and fittings

Electrical cables  Electrical cables are used to transmit electricity, and they are made up of two or more wires bonded together (through twisting or braiding). These wires are covered by protective and insulating material. There are many different types of electrical cables, and they are typically categorized depending on such factors as electrical conductivity, type of insulation, type of protector (or covering), weight, cost, and specific uses. (adsbygoogle = window.adsbygoogle || []).push({}); Other factors that determine the type of electrical cables include voltage rating, type of protective covering, fiber core size, cable...

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Electric work01 -Hand Tools

(adsbygoogle = window.adsbygoogle || []).push({});                         Hand tools are the tools which are used by human in a workshop for various electrical installation related works and also for various maintenance works. Types of hand tools 1. Screw driver A hand tool used to fix and remove screws. Used in assembling work and maintenance work. Available in three main types: a) Flat type – Point of the screw driver is flat shape used for straight slot screws. b) Pozidriv type (Philips type) - Point of the screw driver is special shape (x shape) to match with...

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Plumbing work02 -Basic Types of Pipe and Fittings

                          Pipes are used in water supply systems to deliver water from one place to another. Water flaws through pipes by: Gravity or Force pumping For efficiency, pipes must deliver water with least friction. For this reason pipes are usually circular and the inner surface is made smooth. Man has used many materials for the manufacture of pipes. In the first instance bamboo trunks were used as pipes by boring through the nodes. Then pipes were made by twisting lead sheet around circular timber. Later hot drawn, cold drawn or seam welded pipes were manufactured...

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