Bldg-Electrical, proper knowledge's. .ppt
- 1. 1 BUILDING ELECTRICAL WORKS CONSTRUCTION MANPOWER DEVELOPMENT FOUNDATION 5/F Executive Center Building 369 Sen. Gil Puyat Ave. Makati City
- 2. 2 Introduction • Codes and Standards •Temporary C.O. (Construction)(Art. 3.5.1.6) •Mounting Height •Service Entrance •3,100 mm – at the electric service entrance bldg., also at the lowest pt. of the drip loop, & above areas or sidewalks accessible only to pedestrians, measured from final grade or other accessible surface only for service drop cables supported on and cabled together w/a grounded bare messenger where V not exceed 300Vg. •3,700 mm – over residential property and driveways, and those commercial areas not subject to truck traffic where the voltage does not exceed 300V to ground •4,600 mm – for those areas listed in the 3700 classification where the voltage exceeds 600V to ground. •5,500 mm – over public streets, alleys, roads, parking areas subject to truck traffic
- 3. 3 3,100 mm – at the electric service entrance bldg., also at the lowest pt. of the drip loop, & above areas or sidewalks accessible only to pedestrians, measured fr. final grade or other accessible surface only for service drop cables supported on and cabled together w/a grounded bare messenger where V not exceed 300Vg.
- 4. 4 3,700 mm (12ft.) – over residential property and driveways, and those commercial areas not subject to truck traffic where the voltage does not exceed 300V to ground.
- 5. 5 4,600 mm – for those areas listed in the 3700 classification where the voltage exceeds 600V to ground.
- 6. 6 5,500 mm – over public streets, alleys, roads, parking areas subject to truck traffic
- 8. 8 • Codes and Standards •Mounting Height •Convenience Outlet •Lighting Switches •Minimum size of service drop conductor (Art. 2.30.2) •Minimum size of service entrance conductor (Art. 2.30.4.3) •Grounding Electrode conductor (T2.50.3.17)
- 9. Electrical Plan 9 •COMMON ELECTRICAL SYMBOLS •LIGHTING LAY-OUT •POWER LAY-OUT •SINGLE LINE DIAGRAM •LOAD SCHEDULE
- 10. 10 COMMON ELECTRICAL SYMBOLS Panelboard Duplex Convenience Outlet Convenience Outlet , Counter Height Water Heater Outlet , Grounding Type Refrigerator Outlet , Grounding Type ACU Special Purpose Outlet , Aircon LP-1 Circuit Homerun, indicating circuit number Power Service Entrance
- 11. 11 COMMON ELECTRICAL SYMBOLS M Kilo Watt Hr Meter Lighting Outlet Sa Single Pole Device Light Switch Sab Two Pole Device Light Switch T Telephone Outlet Telephone Service Entrance Circuit Breaker
- 12. 12
- 13. 13
- 15. 15 LOAD SCHEDULE
- 17. 17 ROUGH – IN - WORKS COLUMN BEAM SLAB DRY WALL PARTITION CEILING CONCRETE WALL
- 18. 18 ROUGH – IN - WORKS a. Rigid Steel Conduit (RSC) a. Cutting b. Threading c. Reaming d. Bending b. uPVC a. Cutting b. Bending
- 19. 19 ROUGH – IN - WORKS RSC PIPE BENDING Conduit Bending Terms Running End
- 20. 20 ROUGH – IN - WORKS RSC PIPE BENDING 1. 90° Bending Since r=6D then; 4 C S r 2 C 4 ) D 6 ( 2 4 C S D 3 S 2. 60° Bending Since r=6D then; 6 C S r 2 C 6 ) 6 ( 2 6 D C S D S 2
- 21. 21 ROUGH – IN - WORKS RSC PIPE BENDING Amount of Take-Up for 90° Bends Size and Type of Conduit Take-Up ½ inch RSC 5 inches (12.7cm) ¾ inch RSC 7 inches(18 cm) 1 inch RSC 9.5 inches (24 cm)
- 22. 22 ROUGH – IN - WORKS
- 23. 23 ROUGH – IN - WORKS
- 24. 24 ROUGH – IN - WORKS
- 25. 25 ROUGH – IN - WORKS
- 26. 26 ROUGH – IN - WORKS
- 27. 27 WIRING WORKS MAIN FEEDER LINE SUB FEEDER LINE BRANCH CIRCUITS
- 28. 28 WIRING WORKS a. Determining the number of conductors in a conduit run b. Tagging of Wires c. Wire fishing d. Length of free conductors at outlets, junctions, and switch point e. Splices
- 29. 29 ELECTRICAL DEVICES INSTALLATION SWITCHES RECEPTACLES SPECIAL PURPOSE OUTLET SPECIAL PURPOSE SWITCH
- 30. 30 Receptacles
- 33. 33 SWITCH CONNECTION a. Single Pole switch b. Three-way switch c. Four-way switch Types of Switches
- 34. 34 SWITCH CONNECTION a. Single Pole Return Wire ( RA ) L2 ( ) L1 ( + ) A SA
- 35. 35 b. 2-Single Pole/Duplex SAB A B RA RB L2 ( ) L1 ( ) SWITCH CONNECTION
- 36. 36 c. Triplex/ 3 lamps controlled by individual switches in one location RA RB A B C SABC RC L1 ( + ) L2 ( ) SWITCH CONNECTION
- 37. 37 d. Three Way Return Wire ( RW ) L2 ( ) L1 ( + ) Common Traveler Traveler SWITCH CONNECTION A S3WA S3WA S3w S3w Source L.O. A.
- 38. 38 d. Three Way SWITCH CONNECTION S3w S3w Source L.O. B. S3w S3w Source L.O. C. D. S3w S3w Source L.O.
- 39. 39 e. Four Way Return Wire ( RW ) L2 ( ) L1 ( + ) Traveler Traveler C C 3-WAY SWITCH 3-WAY SWITCH 4-WAY SWITCH SWITCH CONNECTION
- 40. 40 PROCEDURE: 1.0 Designate Positive Bar ( + ) from the line/panel and all the lines going to lighting outlets , convenience outlets and pilot lamps. R – Return Wire T – Traveler 2.0 Designate Negative Bar ( - ) from the line/panel and all the lines going to switches and convenience outlets except for Three way and Four Way switches. For Three Way Switch – One line ( - ) for the nearest Three Way Sw. and one line for RETURN wire going to farthest Three way sw. For Four Way Switch – All terminals are connected to traveler. DETERMINING NUMBER OF CONDUCTORS IN CONDUIT RUN
- 41. 41 A B C D SAB S3WC S3WD S3WC S3WD Ra Ra Rb Rb Rb Rc Rc Rc Rd Rd Tc Tc Tc Tc Td Td Td Td Determine the number of conductors inside conduit run by putting bars perpendicular to conduit. 3 3 2 2 2 2 2 5 6 5 6
- 42. 42 A B C D SAB S3WC S3WD S3WC S3WD Ra Ra Rb Rb Rb Rc Rc Rc Rd Rd TcL TcL TcR TcR TDL TDL TDR TDR S4WC TcL TDL S4WD TCR TDR Determine the number of conductors inside conduit run by putting bars perpendicular to conduit. 3 3 2 2 2 2 2 5 6 5 6 8
- 43. 43 PANEL BOARDS METER CENTERS MOTORS ELECTRICAL EQUIPMENT INSTALLATION
- 44. 44 TESTING and COMMISIONING CONTINUITY TESTING LINE VOLTAGE TESTING LINE CURRENT TESTING INSULATION RESISTANCE TESTING EARTH RESISTANCE TESTING
- 45. 45
Editor's Notes
- #28: 150 mm of free conductor at junctions, outlets to make connection rapidly and efficiently. Splices should be as strong mechanically and as good a conductor as a continuous piece of wire. After the wire is spliced insulation must be equivalent to the original insulation.
- #29: - Check the standard height, sw=1.2m, c.o.-0.3m minimum, counter top receptacle outlet shall be located above but not more than 0.45m above.