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How to wire combination switch outlet 
How to wire combination switch receptacle
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Combination switch outlet
30 amp switch
Cooper 30 Amp switch
Single-pole/ 2-pole on-off switches
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30 amp 2-pole switch
30 amp industrial grade
30 amp double-pole

Heavy duty double-pole switches to turn off both hot wires in 240 volt circuit.
4 screws/ Always rated 240 volt.
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30 amp motor switch
40 amp motor switch
30 amp DPDT
Double pole double throw 30 amp switch
DPDT switch can be used to toggle between 2 different voltages.
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30 amp DPDT switch

Resource:
Use this switch to toggle water heater between 120-240 volt
Ordinary 15-20 amp
single-pole switch
Ordinary 15-20 amp toggle switch.
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15 amp switch
20 amp switch
pilot light switch

Indicator light shows when Load is ON.
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Pilot light switch
Resource:
How to wire pilot light switch
GFCI Switch
Combination GFCI
Requires neutral wire. Add GFCI outlet to same box as switch.
Buy:
Leviton Combination GFCI
Combination GFCI  Amazon

Resources:
How to wire GFCI combo
Combination Switch
Combination switch outlet
Requires neutral wire. Add outlet to same box as switch.
Buy:
Combination switch outlet

Resources:
How to wire GFCI combo
3 & 4-way switch
4-way switch

4-way switch is used with two 3-way switches to add more switches to control one light.
4 screws/ Always rated 120-277 volt.
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4-way switch
Double & triple switch

Multiple switches in one box.

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Double switches
Triple switches
Center off Switch
Center off Switch
Momentary contact
Use to activate delay timer or sound bell.
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Center off Switch

Resources:
How to wire delay timer
Wall switches are rated by voltage and amperage,
.... and roughly rated by manufacturer for application such as builder grade, architectural grade, 'heavy duty,' etc.
Look for volt and amp rating embossed on the electrical device.
Switch ratings include 120 (for 120 volt only), 120-277 (for 120-208-240-277 volt),  240 (always double pole and used for 120-208-240 volt) , and 600 volt double and triple pole motor control switches for any residential or commercial voltage.
Amperages range from 15 to 40 amp.
It is acceptable to use 15 or 20 Amp switch on a 20 Amp circuit, but never on 30 amp. 30 amp circuit requires 30 amp switch.
The switch cannot be rated for fewer (less) amps than amp rating of load.

A Neutral wire is never switched. Neutral must be continuous throughout structure and cannot be switched on-off.
Switch must be grounded, with ground wire connected to green ground screw. High voltage commercial switches without ground screw must be attached to metal box and conduit that are grounded.
Never use Neutral as ground or ground as Neutral.

Switches must be installed inside electrically rated switch box (metal or plastic).
Cannot use homemade box, round box, octagon box, square junction box, pull box etc for switches. Box must be attached to structure, wires must be attached to box, box must have electrically-rated cover made to fit that box, cover must be attached tight and flush against box, and cover must stabilize switch from movement.
Resource: Safe electric wiring
Combination switch outlet
Electrical wiring device with switch and plug.

1) Polarized outlet has a wide blade and narrow blade.
Black Hot wire from breaker box connects to screws that are on same side as narrow blade.
Notice also that screws on Hot side of device have a break-away fin. If fin is removed, then add a wire that connects both screws.
Each 120volt electric box has only 1 Hot wire that tests 120V to ground wire.

Load wire going to light connects to brass screw opposite the switch.
White neutral wire connects to silver screw opposite the outlet. Neutral wires are the white wires that are twisted together and covered with wire nut and pushed to back of electric box. If box does not have neutral wires, the outlet will not work.

Buy:
Combination switch outlet
Resources
Read about 120Volt circuit
How to wire combo device How to wire switch outlet combo so switch controls outlet
If your switch does not have break-away fin and 2 screws on Hot side, then this wiring is not possible
Hot side has the narrow outlet blade.

Review instructions above for basic wiring
1) Use screwdriver or pliers to remove break-away fin between Hot side screws.
If Hot side does not have break-away fin, then wiring is not possible.
2) Add a jumper wire between brass load screw and outlet screw as shown in diagram

Leviton 7299 can not be wired this way
Other Leviton models and brands can be wired this way.

Jumper wire
remove break-away finRemove break-away fin/ for wiring diagram shown above
combo switch replaces outlet
Full size image

How to replace outlet with combination device: start with ordinary outlet

Project objective: replace outlet with combo device.
Have switch on combo device control outlet on device
Ground connection shown.
The break-away find bond the dark and brass screws together so they are electrically connected when wire is attached to either screw. If the fin is removed, then the two screws become electrically separated.
The silver screws are always bonded together for the Neutral connection, and a break-away fin may or may not be present.

Buy:
Combination switch outlet
Resources
Read about 120Volt circuit
1) New combo device controls new light
combo switch replaces outlet
Full size image

2) Switch on combo device controls outlet on combo device



Must remove break-away fin, and add jumper wire from Load brass screw to outlet screw as shown
If your switch does not have break-away fin or 2 screws on Hot side, then this wiring is not possible
Buy:
Combination switch outlet
Resources
Read about 120Volt circuit

Jumper wire
Break-away fin on electric device Jumper wire
Break-away fin
Located between brass or dark-colored screws on duplex outlets
Add jumper wire if break-away fin is removed on Hot side of device.
Do not add jumper wire on other side of device.
Add outlet How to replace switch with combination device
Box must have white Neutral wire
Resource
How to add a switch
How to find Neutral wire
Read pdf
How to drop wire into wall
Old work box
Neutral wire must connect to combo switch.
Neutral is normally two or more white wires covered with wire connector and pushed to back of box.
If box does not have Neutral wire, the Neutral must be brought from any nearby outlet or ceiling box.

Box must have neutral.
Hot wire connects to both switch and outlet on left side of switch.
Neutral wire connects to Outlet on right side of switch.
Load Hot going to light connects to switch on right side of switch.
Cooper 277 pilot light switch
See testing photographs 1 2
Read about 120Volt circuit

Leviton pilot light switch Larger image
How to wire pilot light switch

Buy:
Pilot light switches at Amazon

Resources:
Leviton pilot switch manual
Also see how to wire Cooper pilot light switch
Pilot light switches, or indicator light switch, is designed to activate the pilot light when switch is turned ON.
When switch is OFF, the pilot is OFF.

Black Hot wire from breaker box connects to screws that are on same side as break-away fin. If fin is removed, it is not necessary to add a wire that connects both screws.
Each 120volt electric box has only 1 Hot wire that tests 120V to ground wire.

Load wire going to light connects to brass screw opposite the switch.
White neutral wire connects to silver screw opposite the pilot light. Neutral wires are the white wires that are twisted together and covered with wire nut and pushed to back of electric box. If box does not have neutral wires, the pilot will not work.
Test wires electric tester
How to test for Hot and Neutral wire:
Turn power off
Separate all wires for testing except ground wires.
Turn power on.
Tape tester leads to wood sticks for safety.
Keep hands away from power.
Test each wire to bare ground wire.
Tester lights up on Hot wire.
Hot wire should be black (except 3-way switches)
Test Hot wire to all other wires except ground
Tester lights up on Neutral wire.
Buy:

Voltage neon testers at Amazon
Electric testers at Amazon
Read circuit analyzer Outlet polarity

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Circuit analyzer
Electric tester
Electricity leaves power plant What is 3-phase electric: power plant to end user
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