Information about Terminal and Junction Boxes

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About Terminal and Junction Boxes

Terminal and junction boxes are used to house electrical components and facilitate wiring. They are T-shaped or rectangular, made from a variety of materials, and available in many different sizes, sealing configurations and mounting styles. Length, width, and height are important dimensions. Inside length, inside width, and inside height are also important considerations. Because some terminal and junction boxes can be mounted in several different ways, suppliers recommend viewing product pictures or diagrams to determine which dimensions refers to length and which dimensions refer to width. For standard enclosures, the length or height is measured parallel to the hinge axis. For products with a screw-on or non-hinged cover, the length is the longer of the two dimensions. For enclosures that are rated by the National Electrical Manufacturers Association (NEMA), the width is perpendicular to the hinge axis and the depth is the distance from the opening to the back.

Products & Services Related to Terminal and Junction Boxes

Electronic and Instrument Enclosures

Electronic enclosures and instrument enclosures house electronic components and instruments. They are usually designed for handheld or desktop applications.

Industrial Enclosures

Industrial enclosures are used to house electronic components, equipment and devices. They are designed to protect personnel from accidental injury and to prevent the ingress of environmental contaminants.

Modular Enclosures

Modular enclosures consist of smaller components that can be assembled to create custom enclosures, often for temporary or mobile systems. These modular components are available in standard sizes and allow modular enclosures to be used for a variety of purposes.

NEMA and IP Enclosures

NEMA and IP enclosures are used to house and protect electrical devices and electronic components. NEMA enclosures are rated by the National Electrical Manufacturers Association (NEMA) and designed for hazardous or non-hazardous locations and indoor or outdoor use. Ingress protection (IP) enclosures provide protection against foreign objects and moisture.

Operator Interface Enclosures

Operator interface enclosures are used to house industrial controls such as display screens, pushbuttons, keyboards, lights, and other operator control devices. They are usually mounted on suspension/pendant systems or pedestals.

Pushbutton Enclosures

Pushbutton enclosures are either rectangular or wedge shaped (sloped front or top surface) and have cutouts for mounting pushbuttons. They are usually mounted on walls or pedestals.

Rack Enclosures

Rack enclosures (rack cabinets, laboratory enclosures) are used to house standard 19 in. rack-mounted components or other standard-sized devices.

Engineering Web: Terminal and Junction Boxes - Machine Design

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Terminal Blocks Accept Three And Four-Wire Sensors \| Machine... Series-270 terminal blocks accommodate three and four-wire sensors in control panels or junction boxes with limited space.
Articles By Author \| Machine Design Junction Boxed For Sensors, Actuators IP 67/68-rated sensor/actuator junction boxes, designated the 757 Series, are said to safely extend control

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