Release of joint box with internal wiring (SBJA series)

Hoshi and Electric Co., Ltd. has been supplying lighting fixtures for numerous roads and tunnels since 1957, when it delivered lighting equipment for the Kanmon Tunnel, the world's first underwater tunnel at the time. Road lighting fixtures are mounted on poles, which tend to accumulate moisture and can lead to condensation and water droplets. Our company offers a product that protects electrical wiring from moisture and water droplets, the pole-mounted junction box (SB series), which has a proven track record of over 40 years. We are now launching a new product, the "Junction Box with Internal Wiring for Poles" (SBJA series), which makes the internal wiring of road lighting fixtures safe and easy.
The "Junction Box with Internal Wiring for Poles" (SBJA series) has a protection rating equivalent to IP68 for waterproofing and dustproofing, making it ideal for the humid environment inside poles. It comes with pre-wired connections, ensuring safety and ease of connection, as well as facilitating inspections. The junction box has a sealed compartment for the breaker and terminal blocks in some specifications, protecting the electrical wiring from moisture and water droplets that accumulate inside the pole. Additionally, the top cover can be opened to measure voltage and insulation resistance.


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Overview and Features
A waterproof and dustproof plastic box that houses a breaker and terminal block, shutting out moisture and water droplets inside the pole that can cause insulation failure.
1. Breaker operation can be performed without opening the top cover, making installation and inspection tasks easier.
2. The protection rating against water and dust is equivalent to IP68. It can be submerged in water at a depth of 1 meter for 2 weeks without water ingress into the device.
3. Because a highly airtight box is used, there is no insulation deterioration due to wiring connections.