In Article " Conduit Fittings and Supports ", I explained the following points:
- Types of Conduit Fittings and Supports,
- Notes for Conduit Supporting.
Today, I will explain The Types of Electrical Boxes as follows.
You can review the following articles in the same course for more information:
1- Functions of the Electrical Boxes
In any installation, the electrical boxes are used to fulfill the following requirements:
2- Electrical Boxes Materials
Most electrical boxes are made from the following materials:
3- Where an electrical box is required in the wiring system?
Section 300.15 of the NEC contains specific requirements for where a box or conduit body is required in the wiring system. As can be seen, there is a general statement with several exceptions.
1- Box or Conduit Body
A box or conduit body complying with Article 314 is required to be installed at each conductor splice connection point, outlet, switch point, junction point, or pull point for the connection of conduit, electrical metallic tubing, surface raceway or other raceways.
2- Box Only
A box is required to be installed at each conductor splice connection point, outlet, switch point, junction point or pull point for the connection of Type MC cable, mineral-insulated, metal-sheathed cable, or other cables. A box shall be installed at the connection point between any such cable system and a raceway system.
4- General Rules for Boxes
5- Mounting of Electrical Boxes
6- Types of Electrical Boxes
There are many types of boxes used in a conduit installation. The application and site conditions determine the type of box used. The electrical boxes can be divided to:
The following is a list of the more common boxes and a brief description of their intended use.
First: Outlet Boxes
The outlet boxes with the correct fittings be installed at the following locations:
6.1 Rectangular outlet boxes
6.2 Octagonal Outlet Boxes
Notes for fixture boxes:
6.3 Round Ceiling Pan Boxes
6.4 Square Outlet Boxes
6.7 The masonry box
6.8 The weatherproof box
In the next Article, I will explain Other Types of Electrical Boxes. Please, keep following.