Presentation on theme: "Islam Al-Jarrah Electrical Installation Drawings."— Presentation transcript:
Islam Al-Jarrah Electrical Installation Drawings
state the purpose of electrical installation drawings. differentiate between installation/wiring diagrams and circuit/schematic diagrams identify the symbols and terminology used in installation and schematic diagrams. implement electrical installation drawings.
The ability to read and understand schematics and drawings is an absolute must. Electrical installation drawings provide an electrician with the technical information needed to install the wiring system in apartments or buildings.
Does not show the functional details of the electrical installation show the functional details of the electrical installation interconnections Installation or wiring Diagrams Schematic or Circuit Diagram
It also identifies the wires by wire numbers or color coding. Installation & Wiring Diagram
Lines SymbolsSafety devices Symbols Connection Line Protective earth line Signal line Distribution device Junction box
Number of wires/cable Lamp Pushbutton Socket outlet, single phase linesSafety and reliable devices
Switches Symbols One gang one way switch Two gang one way switch One gang two way switch Intermediate switch
One gang one way switchOne gang two way switch One light operated by one switch One light operated by two switches Two gang one way switchIntermediate switch Two one way switches in a single module Switch of 4 terminals used to control device from more than two locations.
Intermediate switchLamp One gang two way switch SocketTwo Gang one way switch One gang one way switch Connection line
Lab Activity 1 –Page 11 – Module 3
Schematic diagrams show the electrical systems, and are used for understanding the electrical functions of a wiring system. The schematic is a representation of how the circuit works. the schematic shows the logical order of how they are used together.
Connection Line Protective earth line Signal Line Line to indicate component housing Fixed Connection Movable Connection Terminal Connection Strip
Junction box Earth connection Electric fuse Electric lamp MCB Socket outlet, single phase Pushbutton
One gang one way switch Two gang one way switch One gang two way switch Intermediate switch One gang one way two pole switch
Wiring DiagramSchematic Diagram The Wiring Diagram Shows that one lamp in this room is operated by one switch In the schematic diagram each individual connection line is shown and more detailed graphical symbols are used to indicate the electrical details of a wiring.
Wiring DiagramSchematic Diagram The room has two doors so the lamp is operated by two switches More detailed graphical symbols for the interconnections
Wiring DiagramSchematic Diagram Architectural plan shown. Does not show the functional details of the electrical installation. Architectural plan not shown. Details such as the interconnection of components like switches, Junction boxes, light fittings etc. will be shown.