Electrical Power Distribution

Forms of Energy All forms of energy fall under two categories POTENTIAL Stored energy or energy of position (gravitational) KINETIC Energy of motion (motion of waves, electrons, atoms, molecules, and substances)

Work Power Electrical Power is measured in Watts (W) or kWatts (kW) W = joule per second Work is done when a force that is applied to an object moves that object. The work is calculated by multiplying the force by the amount of movement of an object (W = F * d).

Power Generation

Power Transmission Lines

Power Generation and Transmission

Electrical Systems  Incoming Service - Power  Switchgear / Distribution Equipment  Feeders  Grounding  Motor Br. Branch/Equip. Connect  Emergency Generators / ATS / UPS  Lighting Fixtures / Lighting Control  Devices - Lighting  Devices - Power  Lighting Branch  Power Branch  Fire Alarm System  Site Lighting  Telephone / Data Conduit  Incoming Service - Telephone

Electrical Terms  Utility Power XFMR  Switchboard  Panelboard  Motor Control Center  Disconnect Switch  Transformer  Circuit Breaker  Feeder  One-Line Diagram  Equipment Connection  Branch Circuit  Homerun  Receptacle  Switch  Automatic Transfer Switch  Generator  UPS

Electrical Symbols

10  Service equipment is the electrical equipment that constitutes the main control and means of power cutoff to the electric service (normally Power Company supply) brought into the building. Service Equipment

11  All buildings have an electrical service.  Primary service (utility company) is shown on the one-line diagram.one-line diagram  A utility transformer is installed outside the building on a pad (site drawing) or pole. Incoming Service - Power

12 Incoming Service - Power

13 Incoming Service - Power

14 Common Electrical Distribution Systems

1φ2W, 240 Vac 1φ3W, 120/240 Vac 3φ3W, 240 Vac 3φ3W, 240 Vac corner ground delta 3φ4W, 208Y/120 Vac120 x 3 = 208 V 3φ4W, 480Y/277 Vac277 x 3 = 480 V 3φ3W, 480 Vac 3φ4W, 600Y/347 Vac 3φ3W, 600 Vac 2W, 250 Vdc 3W, 125/250 Vdc

Residential Power Distribution

Commercial and Industrial Power Distribution

Utility Primary Transformer

23 In-Coming Service - Power

Carpenters International Training Fund Program 3 – 8 Feeders 24 Incoming Service – power feeders

One-Line Diagram

Power Distribution System Equipment

30 Switchboard

Main Distribution Board (MDB)

32 Main Distribution Board (MDB)

Main Switchboard (MSB)

Incoming Section Meter Main Section Distribution Section Circuit Breakers Fusible Switches Grounding Bonding Switchboard

Incoming Section Meter Main Section Distribution Section Circuit Breakers Fusible Switches Grounding Bonding Switchboard

Incoming Section Meter Main Section Distribution Section Circuit Breakers Fusible Switches Grounding Bonding In-Coming Service - Power

Incoming Section Meter Main Section Distribution Section Circuit Breakers Fusible Switches Grounding Bonding Switchboard

Incoming Section Meter Main Section Distribution Section Circuit Breakers Fusible Switches Grounding Bonding Switchboard

Incoming Section Meter Main Section Distribution Section Circuit Breakers Fusible Switches Grounding Bonding Switchboard

Incoming Section Meter Main Section Distribution Section Circuit Breakers Fusible Switches Grounding Bonding Switchboard

Incoming Section Meter Main Section Distribution Section Circuit Breakers Fusible Switches Grounding Bonding Switchboard

42 Panelboard

43 Panelboard

44 Panelboard Primary Transformer [480/277V 3 ϕ 4W] Power Panelboard Panelboards Lighting, appliances, motor/equip Step-Down Transformer [120/208V 3 ϕ 4W] Main Breaker Enclosed Disconnect

45 Panelboard

Motor Control Center (MCC)

Safety Switch - Disconnect Switch Fusible or Non Fusible 250V or 600V 2 Pole or 3 Pole 30A 60A 100A 200A 400A 600A 800A 1200A

Disconnect Switch 4 & 6-Pole Heavy Duty Safety Switches Two-speed, two-winding motors 4-pole switches are also used in 3-phase, 4-wire circuits when a switching neutral is required.

49

Disconnect Switch

Five Guys Burgers and Fries

Atlantic Food Company Example

E-6 One-Line Diagram/Switchboard Detail

E-7 Electrical Riser Diagram

E-5 Electrical Schedules

North State ElectricCompany Information

North State ElectricEstimating Procedures Take Off Color Code Estimate Setup Package Forms: Pricing Take Off Sheet Feeder Take Off Sheet Motor / Equip Branch Take Off Sheet RFQ