Common Wire Splices And Joints
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This document describes various common electrical wire splices and joints. It explains rat tail or pig tail joints that are used to join conductors inside junction boxes. It also discusses Y-splices that are used on small cables, knotted taps for heavy tensile stress, plain taps and aerial taps for temporary connections, and duplex cross joints, Western Union short-tie splices, and Western Union long tie splices to extend wire lengths. Additionally, it mentions cross joints, wrapped taps, and tee joints for different conductor sizes and stress conditions.
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Common wire splices and joints
The document discusses common wire splices and joints used in electrical installation, including the rat tail or pig tail, Y-splice, knotted tap, plain tap joint, aerial tap, duplex cross joint, Western Union short-tie splice, Western Union long tie, cross joint, and wrapped tap or tee joint. It also discusses extension cords, noting they are flexible electrical cables with plugs and sockets that allow connecting devices to outlets when outlets are insufficient and considers power handling capacity for safety.
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* identify and explain the use of different electrical tools and materials;
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Here are the key points covered in the information sheet:
- Screwdrivers (standard/flat, Philips, stubby, Allen) are used to loosen or tighten screws of different head types.
- Hammers are used for driving or pulling out nails. Types include claw hammer, mallet, ballpeen hammer.
- Pliers (combination, side cutting, long nose) are used for cutting, twisting, bending wires and cables.
- Other tools include wire strippers, electrician's knife, portable electric drill, hacksaw.
- Electrical materials include convenience outlets, male plugs, lamp holders (flush, hanging, surface), switches (hanging, flush, surface)
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The document discusses electrical hand tools and measuring equipment used in electrical installation and maintenance. It defines various tools like screwdrivers, hammers, pliers and their uses. It also explains measuring instruments such as voltmeters, ammeters and multimeters. Learners are expected to identify different tools, understand their functions, and classify them according to their specifications and uses. Various activities and assignments are given to reinforce learning.
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Common wire splices and joints
The document discusses common wire splices and joints used in electrical installation, including the rat tail or pig tail, Y-splice, knotted tap, plain tap joint, aerial tap, duplex cross joint, Western Union short-tie splice, Western Union long tie, cross joint, and wrapped tap or tee joint. It also discusses extension cords, noting they are flexible electrical cables with plugs and sockets that allow connecting devices to outlets when outlets are insufficient and considers power handling capacity for safety.
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* identify and explain the use of different electrical tools and materials;
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* observe safety precautions in handling electrical tools and materials
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* Electrical Tools
* Electrical Materials
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- Pliers (combination, side cutting, long nose) are used for cutting, twisting, bending wires and cables.
- Other tools include wire strippers, electrician's knife, portable electric drill, hacksaw.
- Electrical materials include convenience outlets, male plugs, lamp holders (flush, hanging, surface), switches (hanging, flush, surface)
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Diploma i boee u 5 electrical wiring & safety and protection
This document discusses various types of electrical wiring systems including cleat wiring, CTS wiring, metal sheathed wiring, casing and capping wiring, and conduit wiring. It describes the key factors to consider when selecting a wiring system such as durability, safety, accessibility, cost, and maintenance. Safety devices for appliances like fuses, switches, and earth wires are also explained. The document emphasizes the importance of electrical safety and describes precautions to prevent electric shocks.
Diploma i boee u 5 electrical wiring & safety and protection
This document discusses various types of electrical wiring systems including cleat wiring, CTS wiring, metal sheathed wiring, casing and capping wiring, and conduit wiring. It describes the key factors to consider when selecting a wiring system such as durability, safety, accessibility, cost, and maintenance. Safety devices for appliances like fuses, switches, and earth wires are also explained. The document emphasizes the importance of electrical safety and describes precautions to prevent electric shocks.
insulators matrial
This document discusses the different types of insulators used in overhead power lines. It describes pin insulators, which are used for lower voltages up to 33kV and secure directly to cross arms. Suspension insulators are made of multiple interconnected porcelain discs and are more economical for higher voltages above 33kV. Strain insulators are vertically suspended suspension insulators used at line ends or sharp turns to handle mechanical stresses. Shackle insulators support even lower voltages and can mount horizontally or vertically. Stay insulators provide insulation between grounded stay wires and transmission poles.
INSULATORS AND ITS TYPES
This is the simple ppt explaining about the main components of the power systems. especially we are determining the insulators and its types with real time pictures which are attractive,
DEMO final.pptx
Here are the steps to make a Western Union Short Tie splice:
1. Strip 1/2 inch of insulation from the ends of the two wires to be joined.
2. Twist the stripped ends of the wires tightly together.
3. Wrap the twisted ends tightly with electrical tape so that the joint is insulated.
KL1034 Lect2 Electrical wiring.pdf
This document provides information and safety guidelines for electrical work. It discusses checking for wires before cutting walls, obtaining certificates for work, turning off power when working on circuits. It also summarizes types of electrical equipment, how household electrical systems work with main units and consumer boxes distributing power, basic equations for calculating circuits, types of cables and flex, and guidelines for ring main and radial wiring circuits. Safety is emphasized throughout, including ensuring no accidental power restoration.
ELECTRICAL TOOLS.pptx
The document defines and describes various electrical tools and equipment. It discusses screwdrivers, hammers, pliers, wire strippers, knives and hacksaws used in electrical work. It also covers electrical supplies and materials like outlets, plugs, switches, fuses, boxes, wires, conduits, clamps and common wire splices and joints. Finally, it provides information on extension cords including varieties and important safety considerations when purchasing one.
Insulators
1. There are several types of insulators used in overhead power lines including pin, suspension, strain, and shackle insulators.
2. Suspension insulators are made of multiple interconnected discs and are used for high voltage transmission above 33kV. They are more economical than pin insulators for higher voltages.
3. Strain insulators are horizontally suspended suspension insulators used to handle mechanical stresses at corners, curves, or long river crossings of high voltage transmission lines.
Insulators
1. There are several types of insulators used in overhead power lines including pin, suspension, strain, and shackle insulators.
2. Suspension insulators are made of multiple interconnected discs and are used for high voltage transmission above 33kV. They are more economical than pin insulators for higher voltages.
3. Strain insulators are horizontally suspended suspension insulators used to handle mechanical stresses at corners, curves, and long river crossings of high voltage transmission lines.
Electrical Accessories
The document describes various tools used in electrical work. It provides descriptions of over 50 tools including: voltage testers for testing voltages from 120-600V, continuity testers for testing circuits, multi-testers or volt-ohm meters for measuring AC/DC volts and ohms, wire strippers for stripping insulation from wires, lineman's pliers for working with bare and insulated wires, conduit benders for bending conduit, knockout punches for creating holes in panels, fish tapes for running wires, soldering irons and guns for soldering, wire nuts and connectors for connecting wires, ground rods and clamps for grounding, tapes for insulating splices, boxes and covers for mounting devices,
Tool And Materials with their Uses for ELECTRICITY
Needle-nose pliers are used for bending electrical wire ends before attaching them to terminals. Diagonal cutters feature diagonally aligned jaws for cutting wires or small screws, with leverage increasing with pivot pins closer to the jaws. Kneepads allow electricians to work more comfortably at floor-level installations. A continuity tester checks for uninterrupted current between terminals, useful for finding shorts or grounding issues. A voltage tester identifies live circuits through an illuminated bulb.
INSULATORS & TYPES
Main component parts of the overhead line
The most effective method of providing protection to transmission lines against direct lightning strokes is by use of overhead ground wires as shown in Fig 6. For simplicity, one ground wire and one line conductor are shown. The ground wires are placed above the line conductors at such positions that practically all lightning strokes are intercepted by them (i.
e. ground wires). The ground wires are grounded at each tower or pole through a low resistance as possible. Due to their proper location, the ground wires will take up all the lightning strokes instead of allowing them to line conductors. The degree of protection provided by the ground wires depends upon the footing resistance of the tower.
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Electrical services WITH WIRING FUSES DISTRIBUTION SYSTEMS
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Diploma i boee u 5 electrical wiring & safety and protection
Diploma i boee u 5 electrical wiring & safety and protection
Diploma i boee u 5 electrical wiring & safety and protection
Diploma i boee u 5 electrical wiring & safety and protection
Diploma i boee u 5 electrical wiring & safety and protection
Diploma i boee u 5 electrical wiring & safety and protection
Tool And Materials with their Uses for ELECTRICITY
Tool And Materials with their Uses for ELECTRICITY
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Common Wire Splices And Joints
- 1. COMMON WIRE SPLICES AND JOINTS
- 2. The following are the Common Electrical Wire Splices and Joints.
- 3. Rat Tail or Pig Tail. This kind of joint is commonly used to join two or more conductors inside the junction box. It is suitable for service where there is no mechanical stress when wires are to be connected in an outlet box, switch, or conduit fitting
- 4. Y-splice. This method of wrapping is generally used on small cables because the strands are flexible and all can be wrapped in one operation.
- 5. Knotted tap. This is used where the tap wire is under heavy tensile stress.
- 6. Plain tap joint. This is used where the tap wire is under considerable tensile stress circuit.
- 7. Aerial tap. This is used as a temporary tap usually done in constructions sites. The easy twist will facilitate tap wire movement
- 8. Duplex cross joint. This is a two-tap wire turned simultaneously and is used where the two tap wire is under heavy tensile stress.
- 9. Western Union Short-tie Splice. This is the most widely used splice or joint in interior wiring installation to extend the length of wire from one point to another.
- 10. Western Union Long Tie. This is used extensively for outside wiring to extend the length of wire from one end to another.
- 11. Cross joint. The same application is done as in plain tap and the only difference is that this tap is a combination of two plain taps place side by side with each other.
- 12. Wrapped Tap or Tee Joint. This is used on large solid conductors where it is difficult to wrap the heavy tap wire around the main wire.