Basic Electricity

1
Basic Electricity

• Facts and Diagrams

2
Cable Types

• Determine your need to determine the type of
  cable (Romex) needed
• Gage
• Size of the wire (common 12 or 14)
• 2 wire
• 1 black, 1 white, and 1 bare/green ground wires
• 3 wire
• 1 black, 1 red, 1 white, 1 bare/green ground wires

3
Wire Types

• There are 4 basic types of wire
• Black wire hot
• White wire neutral
• Bare/Green wire ground
• Red hot

4
Wire Types
5
Device Types

• Various devices are needing in wiring
• Light fixture
• Single-pole switches
• 3-way switch
• Duplex receptacles

6
Device Types
7
Device Types
8
Device Types
9
Device Screws

• There is 3 basic types of screws
• Brass (gold) hot (black)
• Silver neutral (white)
• Green ground (bare/green)

10
Device Screws
11
Connector Types

• Connecting caps are colored by size and use
• Red
• Yellow
• Green primarily for ground

12
Connector Types
13
Wiring Rules

• Neutral wire goes without interruption to every
  place in the circuit where current may be used
• Neutral wire is connected to the silver-colored
  terminal.
• The neutral wire is white.

14
Wiring Rules

• Black or red wire is always connected to a brass-
  colored terminal.
• Black or red wires carry hot power or current
  from the source to the devices within the circuit

15
Wiring Rules

• The green, or bare, grounding wire is connected
  to the grounding terminal (green screw) of a
  grounding-type electrical fixture.
• All wires must be spliced or connected to a
  terminal screw in each box.
• Only one wire is allowed to be fastened under a
  terminal screw.

16
A single-pole switch to a light fixture
17
Duplex Receptacle with continuous Circuit
18
A single pole switch to two light fixtures
19
A single-pole switch controlling a light fixture
with a line coming in and a line extending beyond
the fixture.
20
Two 3-way switches controlling a light fixture
with the power coming in through the first switch.
21
Draw the Schematics

• Keyless lamp fixture
• Black wire
• Gold screw
• Single pole switch
• Red wire
• Duplex Receptacle
• Ground wire
• Traveler screw
• 3 way switch
• White wire

22
Draw a Schematic

• Single pole switch to a keyless lamp
• Duplex receptacle
• Single pole switch to two keyless lamps
• Two duplex receptacles both GFI, but only one a
  GFI receptacle