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

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

SYSTEM COMPONENTS OF BUILDING

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

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

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

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

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

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

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

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

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 – (61-600 amps); DE/SE

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

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

FIXTURES/LUMINAIRES INCANDESCENT BULB

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

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.)

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

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