1900 Electrical Box: What is it (And How Did it Get its Name)

what is a 1900 electrical box

What is a 1900 Electrical Box?

A 1900 Electrical Box is defined as a standard 4 inches (4’’) square electrical switch box which is the combination of a gas and electrical box. It is the most commonly used box when a simple switch box is not big enough.

1900 Electrical Box
1900 Electrical Box
1900 Gas and Electrical Box Cover
1900 Combination Gas and Electrical Box Cover

There are usually two types of 1900 Electrical Box are available.

  1. 1900 Electrical Box 
  2. 1900 Deep Electrical Box

Twelve 10 AWG (American Wire Gauge) can be installed in a 4-inch square box with a depth of 2\frac{1}{8} inches.

One of the advantages of using these boxes with a patented design is that it allows the cable to easily be removed, and allows the connector to be reused.

1900 Electrical Box Dimensions

The dimensions of both types of 1900 Electrical boxes are given below.

  1. 1900 Electrical Box is a square box with dimensions of 4 * 4 inches (4’’ * 4’’) square and 1\frac{1}{2} inches deep.
  2. 1900 Deep Electrical Box is a square box with dimensions of 4 * 4 inches (4’’ * 4’’) square and 2\frac{1}{8} inches deep.
Dimensions of 1900 Electrical Box
Dimensions of 1900 Electrical Box

A 1900 Electrical Box is made up of a welded steel construction with slotted screw heads. The knockout (determined by conduit size) is made on the bottom and each side of the box with a trade size of 1\frac{1}{2} inches. These knockouts are suitable for use without a bonding jumper in circuits above or below 250 volts.

Where Did the Name 1900 Box Come From?

Many people believe that the 1900 Box got its name because it originally was 19 cubic inches.

But in the catalog of 1917 central electric supply, this 1900 electrical box was referred to as the 1900 combination gas and electric boxes (yes I know that sounds a bit awkward, but see the label print out below).

1900 Gas and Electrical Box Cover
1900 Combination Gas and Electrical Box Cover

The name 1900 Electrical Box comes from the part number given by the Bossert Company almost a hundred years ago.

Applications of 1900 Electrical Box

Some of the applications of the 1900 Electrical Boxes are discussed below:

  1. 1900 Electrical Box is used for a wide variety of applications where bulky wiring devices or heavy cables require a higher volume box.
  2. 1900 Deep Electrical Box is designed for the installation of flex, MC, MCI, AC, and HCF cables.
  3. These boxes are suitable to use where the flexible armored cable is being used.
  4. These boxes are installed in walls or ceilings for lighting fixtures, switches, or receptacles.
  5. These boxes are suitable for use without a bonding jumper in circuits up to 600 volts.
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