Common Wire Splices and Joints in Residential Wiring Installation

Types of Wire Splices and Joints

1. COMMON WIRE SPLICES AND JOINTS

2. OBJECTIVES Apply necessary skills and knowledge in identifying the common wire and/or cable splices and joints. Appreciate the importance of proper selection of electrical extension cords and associated devices.

3. As a student in Electrical Installation and Maintenance you should acquire the important knowledge and skills in wire splices and joints and should be familiar with the actual application of every splice and joint. This will serve as your tool in performing actual wiring installation. Of course, another factor is the knowledge in interpreting and analyzing the wiring diagram especially if the circuit is complicated.

4. 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

5. 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.

6. PLAIN TAP JOINT This is used where the tap wire is under considerable tensile stress.

7. L1 L2

8. KNOTTED TAP JOINT This is used where the tap wire is under heavy tensile stress.

9. AERIAL TAP JOINT This is used as a temporary tap usually done in construction sites. The easy twist will facilitate tap wire movement.

10. DUPLEX CROSS JOINT This is a two-tap wire turned simultaneously and is used where the two tap wire is under heavy tensile stress.

11. ORDINARY 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. 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.

13. WESTERN UNION LONG-TIE SPLICE This is used extensively for outside wiring to extend the length of wire from one end to another.

14. STAGGERED SPLICE This is used to joint two flat cords to extend its length. The strands are twisted together to form a strong splice. After splicing, electrical tape is wrapped around the individual splices. (Staggered western union splice)

15. 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.

16. Other Types of Splices and Joints

17. THROUGH-END FIXTURE JOINT

18. FIXTURE WIRE SPLICE

19. OCTOPUS JOINT

20. BRITANNIA SPLICE

21. "THROUGH" TWISTED SLEEVE JOINTS

22. EXTENSION CORD An extension cord is a span of flexible electrical power cable with a plug on one end and multiple sockets on the other end. It comes in several varieties to suit the needs of the user.

23. EXTENSION CORD One of the most important considerations is the power handling capacity to make it safe and functional.

24. EXTENSION CORD Electrical gadgets are product of modern technology to make our life better. The number of electrical gadgets available at home and in offices may exceed the existing convenience outlet installed in every room.

25. EXTENSION CORD The best remedy to address the insufficiency of available outlet is to use an extension cord especially if the electrical gadgets need to operate at the same time.

26. EXTENSION CORD

27. REMINDER Be careful in buying an extension cord. You have to look for the Department of Trade and Industry (DTI) markings. The Product Standard (PS) or Import Commodity Clearance (ICC) markings on it signify that the product passed the DTI standard for safety and quality.

28. THANK YOU!!!

29. QUIZ Choose the letter of the correct answer

30. 1. What kind of wire splice or joint is commonly found inside junction boxes? Western Union Long-Tie Splice Rat Tail or Pig Tail Joint Octopus Joint Duplex Cross Joint

31. 2. This is used as a temporary tap usually done in constructions sites. The easy twist will facilitate tap wire movement. Aerial Tap Joint Duplex Cross Joint Wrap Tap or Tee Joint Y-Splice

32. 3. This is used extensively for outside wiring to extend the length of wire from one end to another. Western Union Long-Tie Splice Rat Tail or Pig Tail Joint Octopus Joint Duplex Cross Joint

33. 4. A staggered splice is very useful in joining or extending the length of ________. Stranded wire Solid Wire Flat Cord Fixture Wire

34. 5. What kint of splice or joint is this? Western Union Long-Tie Splice Rat Tail or Pig Tail Joint Octopus Joint Duplex Cross Joint

35. 6. How many wires can be joined using a rat tail or pig tail joint? 1 2 or more 1 to 10 30

36. 7. What kint of splice or joint is this? Cross Joint Duplex Cross Joint Knotted Tap Joint Wrap Tap or Tee Joint

37. 8. This method of wrapping is generally used on small cables because the strands are flexible and all can be wrapped in one operation. Cross Joint Duplex Cross Joint Wrap Tap or Tee Joint Y-Splice

38. 9. is a span of flexible electrical power cable with a plug on one end and multiple sockets on the other end. Cable Extension Cord Flat Cord Solid Conductor

39. 10. Which one of the following markings should be present when buying an extension cord? Department of Trade and Industry or DTI markings Product Standards or PS marking Import Commodity Clearance or ICC marking Any one of the above

40. K

41. E

42. Y

43. KEY B A A C D B C D B D