Introduction to Artificial Intelligence and History of AI
building utilities-electrical introduction
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
4. SYSTEM COMPONENTS OF BUILDING
• 3 CATEGORIES
1. Wirings and Raceways
2. Power Handling Equipment
3. Utilization Equipment – actual use
5. WIRES AND CABLES
1. FMC/MC/AC – BX; flexible
2. NMC/NM – ROMEX; sheat
3. GENERAL WIRING: THERMOPLASTIC (PEC)
4. MI – jacketed
5. SNM – telecommunication/submarine cable
6. SE/USE – aerial/underground
7. UF – direct burial to ground
8. TC – open wireway/support/tray
9. FC – system furniture application/cable management
10. FCC – general purpose
BUSBAR: Busway, Busduct
CABLEBUS; rounded
1. FMC/MC/AC – BX; flexible
2. NMC/NM – ROMEX; sheat
3. GENERAL WIRING: THERMOPLASTIC (PEC)
4. MI – jacketed
5. SNM – telecommunication/submarine cable
6. SE/USE – aerial/underground
7. UF – direct burial to ground
8. TC – open wireway/support/tray
9. FC – system furniture application/cable management
10. FCC – general purpose
BUSBAR: Busway, Busduct
CABLEBUS; rounded
6. WIRES AND CABLES
1. TC – open wireway/support/tray
2. FC – system furniture application/cable management
3. FCC – general purpose
BUSBAR: Busway, Busduct
CABLEBUS; rounded
1. TC – open wireway/support/tray
2. FC – system furniture application/cable management
3. FCC – general purpose
BUSBAR: Busway, Busduct
CABLEBUS; rounded
7. RACEWAYS
1. 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
2. Ceiling Raceway
• Power and Control Tray Cable (TC)
• Busbar
• Cablebus
8. POWER HANDLING EQUIPMENTS
1. TRANSFORMER – voltage to voltage
• Outdoor Transformers
H-frame – 1000 kva
Cluster mounted – 225 kva
Pad mounted – 120V to 240V
9. POWER HANDLING EQUIPMENTS
1. SWITCHBOARD/SWITCHGEAR – free standing
assemblies of switches, fuses/circuit breakers
• Unit Substations (Transformer Load Center) – large
facility
11. POWER HANDLING EQUIPMENTS
3. SERVICE SWITCH – large switch
• disconnecting apparatus
• service disconnecting means
• applied on apartments: meter banks
