Outdoor electrical enclosures require weather-resistant entry points. The Schneider B350 provides a reliable rainproof hub for conduit connections. This component functions as an enclosure accessory for R series devices. Schneider Electric designed this unit for NEMA 3R rated installations.
Technical Specifications & Dimensions
This hub creates a watertight seal between conduit and enclosure walls. The table below outlines its core technical parameters.
| Parameter | Specification |
|---|---|
| Hub Size | 3.50 inches nominal |
| Compatible Conduit | 3.5 inch rigid or IMC |
| Material | Die-cast aluminum |
| Finish | Corrosion-resistant coating |
| Protection Rating | Rainproof (NEMA 3R compliant) |
| Mounting Type | Threaded hub with locknut |
| Gasket Type | Neoprene compression seal |
| Unit Weight | 0.45 kg (0.99 lbs) |
| External Diameter | 120 mm (4.72 inches) |
| Height | 55 mm (2.16 inches) |
| Number of Components | 1 hub body + 1 locknut + 1 gasket |
Construction and Interface Layout
This hub features a die-cast aluminum body with a protective coating. Such a design resists corrosion from rain and humidity exposure. Furthermore, the Schneider B350 includes a neoprene gasket for sealing against the enclosure. You will find standard NPT threads on both ends of this hub. The interior bore allows smooth conduit passage without sharp edges. A supplied locknut secures the hub firmly to the enclosure wall.
Weather Protection and Sealing
Unlike standard conduit hubs, this rainproof model includes a compression seal. The neoprene gasket compresses tightly against the enclosure surface. Consequently, the Schneider B350 prevents water ingress from any direction. The hub design directs falling rain away from the entry point. This feature meets NEMA 3R requirements for outdoor equipment. The hub does not require any batteries or electrical connections.
Installation and Mounting Requirements
Installing the Schneider B350 takes only a few minutes of work. The hub passes through a 3.5 inch knockout in the enclosure wall. You then tighten the locknut from inside the cabinet. Always ensure the gasket sits flat against the exterior surface. The unit requires no special tools beyond standard wrenches. Hand-tighten the locknut with an additional quarter turn. The hub fits R series enclosures and similar NEMA boxes.
Integration with Enclosure Systems
This hub works perfectly with Schneider R series enclosures. It also fits any NEMA-rated cabinet with a 3.5 inch opening. Electricians can connect rigid or IMC conduit directly to this hub. The Schneider B350 accepts both steel and aluminum conduit types. Consequently, this component remains a standard choice for outdoor installations. The unit delivers consistent weather protection across a -40°C to 85°C temperature range.
Details
| Weight | 0.91 kg |
|---|---|
| Dimensions | 110 × 55 × 90 mm |
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