- an enclosure that houses electric wires or cables that are joined together and protects the connections.
Origin of junction box
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for junction box
Say, Tupper, I went over the junction-box in the alley back of the house.
Delaney has a set made by this trouble-hunter when he was at the junction-box.
He disconnected the library telephone wires at the junction-box in the alley.
But, Delaney, how could a man tap in on that junction-box and never leave prints in the snow?
- an earthed enclosure within which wires or cables can be safely connected
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- An enclosure within which electric circuits, such as the electrical wiring for different sections of a building, are connected to other circuits, such as outside power sources. Junction boxes are very common in telecommunications circuitry and are used to protect the connections and provide easy access to them.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.