Electrical Junction Boxes

An electrical junction box is a small box that protects and holds wire connections. It keeps wires safe, tidy, and away from things that could damage them. It also helps prevent problems like short circuits or fires by making sure all wire splices are covered.

You'll need a junction box when you're adding new wiring, splitting a circuit, or extending existing wires. It's also required by electrical codes to keep everything safe and easy to access. Whether you're working on a light, outlet, or switch, a junction box helps get the job done right.

Picking the right junction box is important for a safe and long-lasting electrical setup：

Plastic vs. Metal Boxes

Plastic boxes are a go-to option for most indoor DIY projects. They're lightweight, don't conduct electricity, and are generally easier to install. However, they can crack under stress or in extreme temperatures.

Metal boxes are tougher and more heat-resistant, making them a better fit for heavy-duty or industrial wiring. If you're using metal-sheathed cable (BX cable), a metal box is required for grounding. Just remember, metal boxes must be grounded properly to be safe.

Interior vs. Exterior Use

For indoor wiring in dry spaces like living rooms or bedrooms, a standard box will do the job. But in damp or outdoor areas-like garages, basements, or exterior walls-you'll need a weatherproof junction box. These come with gaskets and sealed covers to protect the wiring from moisture and dirt.

Match the Box to the Cable Type

Choosing a box that fits your cable type is key.

A metal box is the safer and code-compliant choice.

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