Eaton TWB30355 Thru-Wall Barrier - 3 Openings
Part Number: TWB30355
Quick Summary
Engineers rely on the Eaton TWB30355 Thru-Wall Barrier to seal conduits in wall assemblies for safe, compliant electrical installations. A poorly chosen sealing block can cause project delays, moisture ingress, and unreliable firestop performance. This TWB model targets Ordinary/Non-Hazardous Locations, with UL-listed Canadian certifications and installation guidance to support robust safety and code compliance. By leveraging elastomeric sealing with standardized opening configurations, it delivers measurable business value through faster commissioning, reduced maintenance, and consistent enclosure integrity in industrial automation and control-panel environments.
Product Information
Extended Description
TWB30355 Eaton: Eaton Crouse-Hinds series Thru-Wall Barrier TWB sealing block assembly, Elastomeric, 3 frame spaces required, 3 openings in block, Opening size range: 1.500-1.750"
Product Name
Eaton Crouse-Hinds series Thru-Wall Barrier TWB sealing block assembly
Catalog Number
TWB30355
UPC
782274192321
Product Length/Depth
7.3 in
Product Height
3.6 in
Product Width
11.5 in
Product Weight
9.65 lb
Area classification
Ordinary/Non-Hazardous Locations
Opening size range
1.500-1.750"
Number of openings in block
3
Number of frame spaces required
3
Material
Elastomeric
Crouse-Hinds series Thru-Wall Barrier Cable and Conduit Sealing Device catalog page
Thru-Wall Barrier Cable and Conduit Sealing Device Canadian certification
Thru-Wall Barrier Cable and Conduit Sealing Device Canadian certification
Thru-Wall Barrier Cable and Conduit Sealing Device Canadian certification
IF 840B - TWB Sealing Block for TW series Thru-Wall Barrier
IF 840B - TWB Sealing Block for TW series Thru-Wall Barrier
Eaton Specification Sheet - TWB30355
Feature: Elastomeric material provides resilient sealing and long-term resistance to moisture and dust ingress. Benefit: Improves enclosure integrity and reduces maintenance costs over the life of the installation. Application: Ideal for control panels and conduit entrances in warehouses and manufacturing floors, where reliable sealing matters for uptime. Feature: Three frame spaces and three openings standardize conduit routing. Benefit: Simplifies panel design, minimizes field modifications, and accelerates installation. Application: Multi-conduit feedthroughs in automation cabinets and MCCs, enabling clean, compliant wiring layouts. Feature: Opening size range of 1.500-1.750 inches ensures compatibility with common conduits and fittings. Benefit: Enhances flexibility for retrofit projects and new builds without custom components. Application: Electrical junctions and barrier walls in retrofit upgrades for existing facilities. Feature: Elastomeric TWB design with precise block dimensions (7.3 in x 11.5 in x 3.6 in) and manageable weight. Benefit: Easy handling, predictable fit, and stable mounting on standard wall structures. Application: Field install in plant environments where space is constrained. Feature: Certifications and installation documentation including area classification (Ordinary/Non-Hazardous Locations) and IF 840B guidance. Benefit: Strengthens regulatory compliance and speeds audit readiness. Application: Projects requiring documented firestop and non-hazardous location approvals in industrial settings. Feature: Catalog Page and Specification Sheet accessibility. Benefit: Quick reference for engineers during procurement and design reviews. Application: Design validation, procurement, and commissioning workflows across electrical OEMs and system integrators.
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FAQs
TWB30355 is designed to fit Eaton Crouse-Hinds TW series through-wall barriers as a complete sealing block. Installation follows Eaton's IF 840B guidance, starting with ensuring the barrier opening is clean, then aligning the block with three frame spaces and three openings. Tighten per published torque guidelines and verify the elastomeric gasket seats evenly for complete seal and proper conduit fit.
Key factors include the elastomeric sealing material, which resists moisture and dust ingress, the 1.500-1.750 inch opening range, and the three openings with three frame spaces that ensure consistent enclosure integrity. The block’s dimensions support stable mounting, reducing movement that could compromise the seal and firestop performance in routine plant environments.
TWB30355 is specified for Ordinary/Non-Hazardous Locations. For hazardous areas, consult the TW series catalog and UL/CSA listings to identify firestop and enclosure solutions rated for hazardous locations. When in doubt, use the non-hazardous version for standard automation cabinets and upgrade to a certified hazardous-location solution if required.
TWB30355 is documented for Ordinary/Non-Hazardous Locations and is supported by Canadian UL certification references for firestop devices. Eaton also provides installation sheets and catalog data to validate compliance during audits and design reviews, ensuring the product aligns with code requirements for typical industrial environments.
By reducing field modifications and improving seal integrity, TWB30355 lowers downtime due to leaks and rework in conduit terminations. The standardized three-opening configuration accelerates installation, lowers labor costs, and provides predictable performance for ongoing maintenance cycles in control panels and industrial enclosures.