You want to have enough wire to extend about 8 inches inside the box. If there is not enough wire, you will have to add pigtails to lengthen them. ... Project: Junction box. Cost: Under $10.

A junction box (called a J-box) with a cover will hide unprotected wires. VIEW E-EDITION. 25¢ for 3 mos. ... You want to have enough wire to extend about 8 inches inside the box.

If a circuit’s fuse or breaker failed, the wires inside an approved junction box with an approved cover would almost instantly burn in two and act as a fuse to stop the flow of current.