The Motley Fool Discussion Boards

Previous Page

Personal Finances / Building / Maintaining a Home

URL:  https://boards.fool.com/the-new-switch-has-two-terminals-on-each-side-a-19681751.aspx

Subject:  Re: More electrical problems Date:  10/8/2003  12:04 AM
Author:  agg97 Number:  41716 of 140386

The new switch has two terminals on each side, a screw for the ground (there's no ground in the box) and a screw labelled Common. What the heck is the common for?

Did you buy a 3-way switch instead of a 2-way? If you paid more than 25 cents for it, then you did. That "Common" is to allow two switches to work together e.g. a switch at each end of a long hallway, etc. Nothing wrong with using a 3-way switch in a 2-way application, although you paid triple the price you needed. However, I'm not sure if an extra 60 cents is worth the hassle of returning the 3-way for a 2-way and wiring it in.

-Agg97
Copyright 1996-2019 trademark and the "Fool" logo is a trademark of The Motley Fool, Inc. Contact Us