In the other position connection is made between the common terminal and the other traveler terminal.
Remember that a three-way switch is actually a single-pole, double throw switch. The three-way switch has no ON or OFF position, which is why there are no ON or OFF markings on the handle of the switch.
Caution: To prevent severe shock or electrocution always turn the power OFF at the service panel before working with wiring.
Never Assume the power is off! Always double check, and test the device before you begin work.
Typically a 14/2 or a 12/2 cable is used as a feed, a 14/3 or a 12/3 is ran in between the switches. Than a 14/2 or 12/2 is ran to the lighting fixture. The use of either 14g or 12g cable is determined by the current load of the lighting fixtures you are controlling.
If you are having problems, Play it Safe.
Make sure you check the regulations in the National Electrical Code regarding the device you are wiring. If you are still unsure of how to properly wire the circuit you are working on, you will need to contact
a qualified electrician in your area. You can also ask questions in our forum.
Tips:
1) Make sure all devices and splices are in a UL listed
electrical box of the proper size.
2) Make sure you attach the ground wire to all
metal boxes and all devices, with the proper ground screw.
3) Twist wires together with pliers, before you put the wire nut on. Double check to insure that the connection is tight, and that no copper is showing.
4) Always use the screws for termination of wires. Never use the holes in the back of a device for the connection.
5) Switches have differant ratings, some switches may be rated for 15amps at 125 volts, while others will have higher voltage and ampere rating. Make sure you use the switch that is rated for the voltage and amperes you are using.
Never exceed 80% of the ampere rating of a switch.
6) A switch in a wet location or outside of a building shall be enclosed in a UL listed weatherproof enclosure or cabinet. Switches shall not be installed whithin wet locations in a tub or shower spaces, unless installed as part of a listed tub or shower assembly.
Related Sections:
Single Pole Switches >
Four Way Switches >
Dimmer Switches
Related Resources:
National Electrical Code Handbook 2008
2008 National Electrical Codebook
Stallcup's Illustrated Code Changes, 2008 Edition
The Complete Guide to Home Wiring (Black and Decker Complete Guides Series)
Wiring Simplified
Guide to Using the National Electrical Code
Residential Remodeling and Repair Professional Reference
Electrical Services and Grounding Video.
Electrical Code Inspection Wiring and Devices Video
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