Eaton TWB40366 Thru-Wall Barrier - UL Certified
Part Number: TWB40366
Quick Summary
TWB40366 Thru-Wall Barrier seals through-wall cable openings in industrial enclosures. Maintenance teams often struggle with ineffective seals that degrade under vibration and temperature, causing downtime. This UL-listed block supports reliable performance in Ordinary/Non-Hazardous Locations, with Canadian and hazardous-location component certifications as applicable. By consolidating cable and conduit sealing in four frame spaces, it streamlines installation, reduces lifecycle costs, and improve overall enclosure integrity. For engineers integrating Eaton Crouse-Hinds TWB components, this sealing block delivers a robust, maintenance-friendly solution for clean, compliant wiring installations.
Product Information
Extended Description
TWB40366 Eaton: Eaton Crouse-Hinds series Thru-Wall Barrier TWB sealing block assembly, Elastomeric, 4 frame spaces required, 3 openings in block, Opening size range: 2.000-2.250"
Product Name
Eaton Crouse-Hinds series Thru-Wall Barrier TWB sealing block assembly
Catalog Number
TWB40366
UPC
782274192345
Product Length/Depth
13.5 in
Product Height
4.5 in
Product Width
7.88 in
Product Weight
15.05 lb
Area classification
Ordinary/Non-Hazardous Locations
Opening size range
2.000-2.250"
Number of openings in block
3
Number of frame spaces required
4
Material
Elastomeric
Crouse-Hinds series Thru-Wall Barrier Cable and Conduit Sealing Device catalog page
Thru-Wall Barrier Cable and Conduit Sealing Device UL certification
Thru-Wall Barrier Cable and Conduit Sealing Device UL certification
Thru-Wall Barrier Cable and Conduit Sealing Device UL certification
IF 904 - TWB Closure Kit for TW series Thru-Wall Barrier
IF 904 - TWB Closure Kit for TW series Thru-Wall Barrier
Eaton Specification Sheet - TWB40366
Feature: 3 openings in the block within 4 frame spaces. Business Impact: Enables sealing of multiple cables in a single barrier, reducing parts and labor while improving enclosure integrity. Application: Ideal for through-wall barrier installations in control panels and junction enclosures. Feature: Elastomeric material. Business Impact: Delivers resilient sealing that maintains performance under vibration and temperature fluctuations, lowering leakage risk. Application: Non-hazardous, ordinary location environments requiring durable seals. Feature: Dimensions and weight (13.5 in L × 4.5 in H × 7.88 in W; 15.05 lb). Business Impact: Provides a stable, easy-to-handle barrier block that fits standard frame configurations and reduces mounting challenges. Application: Quick retrofit and reliable field installation with TWB series. Feature: Opening size range of 2.000–2.250 inches. Business Impact: Accommodates common cable and conduit sizes, minimizing reworks. Application: Flexible integration with standard wiring feeds. Feature: Certifications and compliance (Ordinary/Non-Hazardous Locations; UL-listed). Business Impact: Supports regulatory compliance and safer installations, reducing risk and audit findings. Application: Suitable for non-hazardous areas in industrial facilities. Feature: Compatibility with TWB closure solutions (IF 904) and Eaton TWB catalog resources. Business Impact: Streamlines installation planning, reduces downtime, and ensures alignment with installation sheets. Application: End-to-end TWB system deployment for field teams and procurement planning.
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FAQs
TWB40366 is designed as a through-wall barrier for the TWB family and complements TW series installations. It aligns with the IF 904 closure kit to simplify assembly and seal integrity, enabling a compact, four-frame-space configuration with three openings. This compatibility minimizes field fitting bets and reduces installation time across standard non-hazardous enclosures.
Key specs include three openings in the block, four frame spaces required, elastomeric material, opening size range of 2.000–2.250 inches, overall dimensions of 13.5 inches long by 4.5 inches high by 7.88 inches wide, and a weight of 15.05 pounds. Catalog number is TWB40366, and the unit carries UL certification for ordinary locations.
No. The TWB40366 is specified for Ordinary/Non-Hazardous Locations. If your installation requires protection in hazardous environments, consider consulting the applicable UL listings and alternative TWB components designed for hazardous locations, and verify compatibility with your system’s safety classifications.
Maximize seal performance by selecting the correct 2.000–2.250 inch openings for each feed, ensuring four frame spaces are available, and using the TWB closure kit IF 904 where recommended. Verify enclosure ratings and follow Eaton’s installation sheets to maintain compliance, reduce vibration-induced wear, and minimize maintenance cycles.
TWB40366 consolidates multiple seals into a single barrier, reducing parts, labor, and installation time. Its elastomeric material maintains seal integrity under typical industrial conditions, which lowers maintenance costs and downtime. UL listing adds compliance confidence, helping audit readiness and avoiding non-compliance penalties while speeding time-to-value for enclosure wiring projects.