Transcript 120 Volt house wiring

Unit 2- Electrical
Components-continued
EET 110 Electronics Survey I
Topic Covered Last Week




Conductors
Wire Sizes
Lamps
Switches
Topics to cover



120 vs. 240 Voltage systems
phasing
Recptacles
120 Volt house wiring

2 wires
– Hot-power
carrying wire
– Neutral-grounded
wire
120 V
240 Volt House wiring

3 wires
– Two hot-power
carrying
– Neutral-grounded
wire

Connecting 2
colored together
results in 240
120 V
240V
120 V
Outlet Receptacles


Duplex outlets
220-240 volt outlets
Outlets


Permanently wired in structure
Provide the Female (receiving)
terminal
GFCI
Nongrounding Type
Receptacle




Older type
receptacle
Only to be used
where there is no
grounding system
NEC allows GFCI in
place of
nongrounding
110 V current
Grounded Receptacle



Provides a
connection for
grounding
conductor (green
hex screw)
Safely bleeds off
current to prevent
shock
110V current
Split Receptacle




Has a break-off
fin to separate
outlets
Can provide two
separate circuits
One circuit with
½ switched
110V current
No-shock safety duplex




Self-closing outlets
Prevents children
from inserting
objects
Rotary cap snaps
shut when plug is
removed
110 V system
Weatherproof receptacles





Outdoor use
Seals moisture out
Self closing or
manual close
New installation
must be GFCI
protected
110 V system
Tandem blades, U-shaped
ground

Terminal
connections
– Silver- ungrounded
(hot)—240
application only
– Brass- ungrounded
(hot)
– Green- grounded

Used for
– Air conditioners

240 V system ONLY
Receptacles for three
wires


2 Brass terminals
Used for
– Electric dryers
– Electric ranges

240 V system
Horizontal and vertical
blades and U shaped ground

Used for
– Large air conditioners
– Heavy power tools
– Garden equipment

240 V system