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Product Introduction
The Schneider 490NAE91100 Main Bus Junction Box is a robust electrical distribution component designed to facilitate safe and efficient connection and distribution of power within industrial and commercial electrical systems. Serving as a central hub for main bus connections, this junction box allows multiple circuits to be interconnected while maintaining high safety standards and minimizing electrical losses. It is engineered to handle high-current applications, providing reliable performance under demanding operating conditions. The design ensures compliance with international electrical standards, offering secure and organized wiring for large-scale electrical installations.
Product Parameters
| Parameter | Specification |
|---|---|
| Model Number | 490NAE91100 |
| Product Type | Main Bus Junction Box |
| Rated Voltage | 600 V AC |
| Rated Current | 400 A |
| Short-Circuit Rating | 35 kA |
| Enclosure Type | NEMA 1 / IP20 |
| Material | Steel, powder-coated finish |
| Number of Incoming Feeders | 1 main bus input |
| Number of Outgoing Feeders | 6–12 outputs (configurable) |
| Mounting | Wall or panel mount |
| Shipping Size | 450 × 55 × 120 mm |
| Shipping Weight | 0.092 kg |
| Operating Temperature | –25 °C to +60 °C |
| Standards Compliance | IEC 61439, UL 508A |
Applications
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Industrial Plants – Centralized distribution of electrical power to multiple machinery and equipment.
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Commercial Buildings – Power distribution for large HVAC, lighting, and elevator systems.
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Renewable Energy Systems – Integration into solar and wind energy plants to manage high-current bus connections.
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Data Centers – Reliable power routing for server racks and cooling systems.
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Marine & Offshore Platforms – High-current distribution in challenging and vibration-prone environments.
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Manufacturing Facilities – Safely connects multiple production line circuits to the main bus.
Advantages
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High Current Capacity – Supports up to 400 A, suitable for heavy industrial and commercial loads.
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Short-Circuit Protection – Rated for 35 kA, ensuring safety under fault conditions.
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Durable Construction – Powder-coated steel enclosure protects against corrosion and mechanical impacts.
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Flexible Configuration – Multiple outgoing feeders allow easy integration into complex electrical networks.
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Standards Compliance – Meets IEC 61439 and UL 508A standards for safety and performance.
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Easy Installation – Wall or panel mountable with organized terminal layout for streamlined wiring.
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Maintenance Friendly – Removable covers and accessible terminals facilitate inspection and servicing.
FAQ
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What is the maximum voltage the junction box can handle?
The 490NAE91100 is rated for up to 600 V AC, suitable for industrial and commercial applications. -
What is the rated current for this junction box?
The main bus can carry up to 400 A continuously. -
How many outgoing feeders can be connected?
The junction box can accommodate 6–12 outgoing feeders depending on the configuration. -
What short-circuit current is the box rated for?
It is rated to withstand a short-circuit current of up to 35 kA. -
What type of mounting is supported?
The box supports both wall mounting and panel mounting for flexibility. -
What standards does this junction box comply with?
It complies with IEC 61439 and UL 508A standards for industrial electrical panels. -
What materials are used in the construction of the box?
The enclosure is made of steel with a powder-coated finish for durability and corrosion resistance. -
Can the box be used in outdoor or harsh environments?
It is designed primarily for indoor use (NEMA 1 / IP20); additional enclosures are recommended for outdoor applications. -
How is wiring organized inside the junction box?
Terminals are clearly labeled and arranged to allow organized, efficient, and safe wiring connections. -
What is the operating temperature range for the junction box?
It can operate reliably in temperatures from –25 °C to +60 °C.
Recommended Related Models
| Model | Description |
|---|---|
| 490NAE91200 | Main Bus Junction Box with 500 A rating |
| 490NAE91300 | Junction Box with enhanced short-circuit capacity 50 kA |
| 490NAE91400 | Bus junction box with additional feeder slots |
| 490NAE91500 | Compact main bus junction box for limited space |
| 490NAE91600 | High-current bus junction box with NEMA 3R rating |
| 490NAE91700 | Junction box with integrated circuit breakers |
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