A J-Box, short for Junction Box, is an enclosure used in electrical systems to house and protect wire connections. It serves as a central point where electrical wires are joined together, allowing for safe distribution of power and easy access for maintenance or future modifications.
In residential architecture, particularly in Australia, a J-Box is typically made of metal or plastic and is installed behind walls, ceilings, or under floors. It helps:
- Prevent electrical fires by containing sparks or heat from loose connections.
- Protect wires from physical damage.
- Ensure compliance with Australian electrical standards (such as AS/NZS 3000 – Wiring Rules).
- Facilitate inspections and repairs by providing a clear access point to wiring junctions.
All connections within a J-Box must be properly secured and covered with an approved lid, and the box must remain accessible (not permanently concealed) to comply with building codes.
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