1. OHM’s LAW – relationship of EMF, Current, Resistance
Formula: I = V/R V=IR R=V/I
I = Current (Amperes)
V = EMF (Volts)
R = Resistance (Ohms)
Voltage (Volts) – pressure or force; Voltmeter
Amperes (Amps) – inherent in wires (conductor); Ammeter
Ohms – friction; inherent in insulator/Ohmmeter

2. Other Terminologies DEVICE – does not consume electricity
WATT – rate of power; power consumption;
heat volts + ampere
Watt Meter – any one time
Watt-Hour Meter – periodic; KWH Meter/
Electricity Meter
ALTERNATOR – AC generator
GENERATOR – M.E to E.E.
MOTOR – E.E. to M.E.
BATTERY – electrochemical; electrolysis
Primary – nonrenewable
Secondary - rechargeable

3. SYSTEM COMPONENTS OF BUILDING

4. SYSTEM COMPONENTS OF BUILDING
3 CATEGORIES
1. Wirings and Raceways
2. Power Handling Equipment
3. Utilization Equipment – actual use

5. WIRES AND CABLES
FMC/MC/AC – BX; flexible
NMC/NM – ROMEX; sheat
GENERAL WIRING: THERMOPLASTIC (PEC)
MI – jacketed
SNM – telecommunication/submarine cable
SE/USE – aerial/underground
UF – direct burial to ground
TC – open wireway/support/tray
FC – system furniture application/cable management
FCC – general purpose
BUSBAR: Busway, Busduct
CABLEBUS; rounded
FMC/MC/AC – BX; flexible
NMC/NM – ROMEX; sheat
GENERAL WIRING: THERMOPLASTIC (PEC)
MI – jacketed
SNM – telecommunication/submarine cable
SE/USE – aerial/underground
UF – direct burial to ground
TC – open wireway/support/tray
FC – system furniture application/cable management
FCC – general purpose
BUSBAR: Busway, Busduct
CABLEBUS; rounded

6. WIRES AND CABLES
TC – open wireway/support/tray
FC – system furniture application/cable management
FCC – general purpose
BUSBAR: Busway, Busduct
CABLEBUS; rounded
TC – open wireway/support/tray
FC – system furniture application/cable management
FCC – general purpose
BUSBAR: Busway, Busduct
CABLEBUS; rounded

7. RACEWAYS Floor Raceway underfloor raceway – conventional installation
cellular metal floor raceway – rib decking/raised floor system
cellular concrete floor raceways – T-joist/ precast concrete slab with built in pipes
Ceiling Raceway
Power and Control Tray Cable (TC)
Busbar
Cablebus

8. POWER HANDLING EQUIPMENTS
TRANSFORMER – voltage to voltage
Outdoor Transformers
H-frame – 1000 kva
Cluster mounted – 225 kva
Pad mounted – 120V to 240V

9. POWER HANDLING EQUIPMENTS
SWITCHBOARD/SWITCHGEAR – free standing assemblies of switches, fuses/circuit breakers
Unit Substations (Transformer Load Center) – large facility

10. POWER HANDLING EQUIPMENTS
PANELBOARD – final distribution point; PP/LP
Main Panelboard
Distribution Panelboard

11. POWER HANDLING EQUIPMENTS
SERVICE SWITCH – large switch
disconnecting apparatus
service disconnecting means
applied on apartments: meter banks

12. POWER HANDLING EQUIPMENTS
4. CIRCUIT PROTECTIVE DEVICES – overload/short circuit
FUSE – alloy link or wire; fusible link; nonrenewable
Plug Fuse – dwelling (5-30 amps)
Cartridge Fuse – (5-60 amps)
Knife Blade Fuse – ( amps); DE/SE

13. POWER HANDLING EQUIPMENTS
CIRCUIT BREAKERS – electromechanical device
Thermal Pigtail (Copper) – senses heat
Magnetic Pigtail (Copper) – senses load

14. FIXTURES/LUMINAIRES INCANDESCENT BULB
Filament
Gas
Lead-in-wires
Stem Press
Exhaust Tube
Base
Fuse
8. Mica Disc
9. Button Rod
10. Button
11. Support Wires
12. Soft Glass
Hard Glass
Inside frosted – white silica

15. FIXTURES/LUMINAIRES INCANDESCENT BULB

16. FIXTURES/LUMINAIRES FLUORESCENT LAMP
Cylindrical Glass Tube – phosphor
Cathode – argon and low pressure
mercury vapor
Ballast – limits current
Starter - switch
TYPES:
Pre-Heat Starting - CFL
Instant Start (Slimline) – w/o a starter
Rapid Start – bi-pins

17. CONDUITS pipes, tubings (electrical raceway)
Materials (Metallic or Nonmetallic)
Make
Rigid Metal (RSC, EMT)
Flexible Metal (BX)
Rigid Nonmetal (Plastic, etc.)
Flexible Nonmetal (Plastic, etc.)

18. Condulets CONDULETS/UNILETS (Conduit Fittings)
Straight and angle couplings
Elbow Fittings
Tee and Cross connections

19. ELECTRICAL BOXES
Outlet Box – cable ends
Utility Box – outlets, switches
Pull Box – facilitates pulling
Junction Box – joining, splicing
Cut-out Box – metal box