Sometimes referred to as an “Electrical Box” or “Terminal Box” a Junction Box is essentially a protective box that shelters interconnected wires. There are several variations and material components that might be used in a junction box, depending on where it’s being used.
This includes
A Metal Junction Box
A PVC or Plastic Junction Box
ABS Plastic Junction Box
Fiberglass Junction Box (fiber-reinforced plastic)
The type of junction box an electrician recommends or chooses might vary depending on whether the box will be protected in the interior of a structure or exterior. Commercial and residential junction boxes may also have their own requirements.
Beyond protecting wires and components from the elements it also prevents problems with wire chewing animals, and possible complications caused by ambient dust. At the same time, a junction box also helps organize wiring per the building’s floor plan. Most include some form of labeling which further helps keep things organized for future contractors and service personnel.
A properly covered and secured junction box will also help prevent a short-circuit failure fire from spreading to the surrounding environment.
