Eaton TWBS30355 Thru-Wall Barrier - UL Certification
Part Number: TWBS30355
Quick Summary
Eaton TWBS30355 Thru-Wall Barrier sealing block assembly provides reliable cable and conduit sealing for marine applications. In marine and industrial settings, installers struggle to achieve watertight integrity and straightforward maintenance under harsh conditions. UL certification for firestop devices and hazardous locations, plus Canada listings and ordinary/non-hazardous area suitability, helps you meet regulatory expectations. Compact elastomeric sealing, combined with three openings and three frame spaces, reduces field rework while accelerating procurement and installation in shipyards and offshore facilities. This TWB block integrates with the TW series and is supported by Eaton installation sheets for dependable field performance. By standardizing penetrations with TWBS30355, you improve lifecycle integrity and reduce commissioning risk in demanding environments.
Product Information
Extended Description
TWBS30355 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", For marine applications
Product Name
Eaton Crouse-Hinds series Thru-Wall Barrier TWB sealing block assembly
Catalog Number
TWBS30355
UPC
782274277240
Product Length/Depth
11.38 in
Product Height
3.25 in
Product Width
7.25 in
Product Weight
12.05 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
Type
For marine applications
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 1020 - TWBS Sealing Block for TW series Thru-Wall Barrier
Eaton Specification Sheet - TWBS30355
Feature Elastomeric sealing material. Business Impact Delivers durable, flexible sealing that resists seawater intrusion and vibration, reducing maintenance cycles. Application Marine panels and bulkheads where movement and moisture are factors. Feature Three openings in the block and three frame spaces. Business Impact Enables multiple penetrations with a single sealing assembly, cutting part counts and simplifying maintenance. Application Shipboard controls, warehouse panels, offshore platform enclosures. Feature Opening size range 1.500-1.750 inches. Business Impact Accommodates common cables and conduits without oversized gaps, improving seal integrity. Application Conduit entries and cable penetrations in restricted spaces. Feature Elastomeric material with marine suitability. Business Impact Provides corrosion resistance and resilience in saltwater environments, lowering replacement costs. Application Exterior and interior interfaces on vessels. Feature Compliance support with UL certification and Canada listings. Business Impact Eases procurement and design approvals, reducing qualification time for project bids. Application North American marine and industrial installations. Feature Dimensions and weight (11.38 in L x 3.25 in H x 7.25 in W; 12.05 lb). Business Impact Facilitates accurate space planning and mounting hardware selection, minimizing installation delays. Application Panel cutouts and knockout sizing in control rooms and engine rooms. Feature Installation resources IF 1020 instruction sheet and Eaton specification sheet. Business Impact Streamlines on-site assembly and reduces misconfiguration risk. Application Field technicians follow a proven workflow for reliable sealing. Industry context Insight The TWB family aligns with TW series components, enabling standardized penetrations across multiple projects and stock-keeping for maintenance teams. This compatibility lowers total cost of ownership by reducing spare part variety and improving reorder accuracy.
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FAQs
TWBS30355 installation starts with confirming the panel cutouts match the 1.500-1.750 in opening range and that three frame spaces are available. Mount the sealing block into the panel, align with the Through-Wall Barrier system, and secure per the IF 1020 instructions. Verify elastomeric sealing is continuous and conduct a final leak/pressure test to confirm watertight integrity.
The 1.500-1.750 inch range accommodates typical marine cables and conduits, enabling three simultaneous penetrations without oversized gaps. This minimizes sealing gaps, reduces leakage risk, and simplifies procurement by limiting the need for adapters. For best results, match penetrations to the range and seal each opening with the elastomeric TWB block as designed.
Yes. TWBS30355 is specified for Ordinary/Non-Hazardous Locations and carries UL certifications indicating suitability for non-hazardous environments. While it supports compliant marine installations, it is not intended for hazardous location use. Always verify site classification and follow applicable local and international standards when planning penetrations in marine projects.
TWBS30355 leverages UL certifications for firestop devices and hazardous-location components, with Canada listings referenced in the provided documentation. These certifications, paired with the Ordinary/Non-Hazardous area classification, streamline procurement and approval processes for North American marine and industrial applications.
Consult the Crouse-Hinds TWB catalog page and the Eaton TWBS30355 specification sheet for general guidance, plus the IF 1020 instruction sheet for sealing block installation. The UL certification pages provide compliance details, while the product page and datasheets explain dimensional data, material, and the three openings with 3 frame spaces.