When to Use a Metal Junction Box

Any wiring from light switches to ceiling fans to industrial control panels, you will most likely find metal junction boxes that protect the wiring. Metal electrical boxes are known for their durability and versatility, which is why they are found in homes, businesses and industrial facilities.

Whether you are for home decoration or starting a DIY project, it is important to know when to use a metal junction box. Zhongfeiya Tech is a supply of customized junction boxes for various applications, from heavy machinery control to household electronic projects, we can provide you with a metal enclosure that suits you.

Engineer from Zhongfeiya Tech will share the following experience on how to make a decision of junction box.So when is a metal junction box a suitable choice? When should I switch to a plastic junction box?

Metal junction box VS plastic junction box

There are two commonly used junction boxes: metal junction boxes and plastic junction boxes. Both have their own advantages, and both are useful for certain application areas.

For many applications, the biggest advantage of metal junction boxes is their durability. Metal junction boxes can withstand a variety of adverse environmental conditions, including crushing shocks, open flames, and extremely hot or cold temperatures. They can also be used as natural grounding points for metal sheathed wires and other components that require electrical grounding.

Plastic junction boxes are generally cheaper and may be easier to use. However, some plastic junction boxes are not as flexible as metal boxes, so if you need the maximum protection and maximum durability of the junction box, they may not be the ideal choice.

In the next part, we will examine some common scenarios of when to use metal electrical boxes and when to use plastic junction boxes.

The situation of using a metal junction box?

If the following situations occur, you should use a metal junction box:

You are using a metal sheathed BX cable. Metal sheathed cables are designed to be used with metal junction boxes to ground the wires.

It is very important that the electrical box is firmly connected to the stud. The rigidity and warpage resistance of metal electrical boxes means they are compatible with the heavy-duty screws you need for extra secure stud connections.

Your project is located in an exposed indoor space. Some internal locations, such as unfinished basements, will have non-embedded electrical boxes directly connected to the surface (usually a masonry wall). Since these applications expose the wires, you should use metal junction boxes to protect them from damage.

You need a more durable electrical box. If some plastic electrical enclosures are put under pressure, they may be damaged. Metal electrical enclosures are generally more flexible.

These are not the only situations where you should choose a metal junction box, but they are some of the most important. If you think that the metal junction box is the right choice, please click on the link below or contact Zhongfeiya Tech.

When not to choose pvc junction boxes?

Conversely, there are some reasons to choose a plastic junction box for your project. In the following situations, plastic junction boxes may be a better choice for your application:

You are using a non-metallic sheathed wire. Romex wires and plastic junction boxes are often used together, but metal enclosures are also acceptable, depending on the project. If you use a metal sheathed wire, you can use a plastic casing, but you always need to take appropriate steps to ground the wire first.

If you want to save money, it is safe to use metal or plastic enclosures. Compared with metal electric boxes, plastic electric boxes are generally cheaper and require fewer additional equipment, such as clips. (But keep in mind that if the application requires a metal case, no amount of savings is worth sacrificing security.)

You want the junction box to be easy to operate and use. Certain types of sheet metal shells have sharp edges that can cause injury, although wearing gloves or choosing a finished sheet metal shell can usually eliminate these risks.

PVC junction box is the right choice, please click the link  or contact Zhongfeiya Tech.