Wiring

1
Wiring

• Skill Trades 1201

2
Wire Size

• The diameter of the wire determines the amount of
  current that can safely flow through it.
• Wires are sized according to a table known as the
  American Wire Gauge (AWG).

3
Wire Size

• Wire size varies from AWG 40 to 0000 with 40
  being the smallest and 0000 the largest.
• The larger the number the smaller the wire
  diameter.

4
Table
Application Amps Guage
AC 120V 15 14-2
Duplex Circuits 15 14-2
Lights 15 14-2
Clothes Dryer 30 10-3
Range 40 8-3
Hot Water Heater 30 10-2
5
Common Residential Wire Sizes

• 24 AWG Used for Computers
• 22 AWG Used for Telephone
• 18 AWG Used for Doorbell Circuit
• 14 AWG Used for Light, Switches,
  Receptacles,

6
Common Residential Wire Sizes

• 12 AWG Used for Light, Switches,
  Receptacles, Baseboard
• Heaters, , Hot Water Heaters
• 10 AWG Used for Clothes Dryers
• 8 AWG Used for Electric Range
• 2 AWG Used for Ground Wire

7
Common Residential Wire Sizes

• 000 AWG Service Entrance Cable
• 0000 AWG Service Entrance Cable

8
Residential Wire Colour Code

• Hot Wire
• Black or any other colour except White, Green,
  bare copper.
• Neutral Wire
• White
• Ground Wire
• Green or Bare Copper

9
Two Wire Circuits

• Black and White Wires
• Used for lights and receptacles in 120 volts AC
  circuits.
• Black and Red Wires
• Used for electric heaters and hot water tanks in
  220 volt circuits.
• Used between switch and lighting outlets.

10
Three Wire Circuits

• Black, Red, White or Green Wires
• Used for electric Dryers and Ranges.