Overview
The Bridgeport 152-DC is a 3/4″ rigid conduit threaded hub engineered to provide a durable, concrete-tight connection between threaded rigid service entrance conduit and electrical enclosures or junction boxes. Manufactured from die-cast zinc with a ball-burnished, mirror-smooth finish, this hub is rated for indoor and outdoor installations in demanding environments. The insulated throat design protects conductor insulation from abrasion while maintaining electrical integrity in corrosive or concrete-aggregate environments.
Key Features
- Concrete-Tight Design: Sealing ring prevents concrete aggregate and contaminants from entering the enclosure or damaging conductor insulation
- Insulated Throat: Rated to 105°C to safely protect cable insulation from mechanical stress and moisture intrusion
- Die-Cast Zinc Construction: Ball-burnished body provides corrosion resistance and long service life in harsh environments
- NPSM Threads: Male/female thread connection creates a pressure-tight, vibration-resistant seal for reliable service entrance applications
- Buna-N Sealing Ring: Elastomeric seal encircles the knockout to prevent contaminants and moisture ingress
- Box of 13 Units: Convenient packaging for job site or inventory stock
Technical Specifications
- Trade Size: 3/4 inch
- Diameter × Length: 1-1/4 inch OD × 1-9/16 inch L (approximately 15/16 inch thread length)
- Material: Die-Cast Zinc, ball-burnished/mirror smooth finish
- Sealing Ring Material: Buna-N rubber
- Temperature Rating: 105°C (221°F)
- Compatible Conduit Types: IMC, Rigid Aluminum, Rigid Steel
- Connection Type: Threaded (NPSM)
- Weight (per unit): Approximately 0.3 lb
- Cable Entry: Through rigid conduit into fitting throat
- Certifications: UL 514B Type 4, UL E9391 (Canada and US), CSA LR39354, NEMA FB-1, Federal A-A-50553
- Packaging: Box of 13 units
Typical Applications
- Service entrance conduit connections to meter bases, panels, and control enclosures
- Outdoor electrical installations subject to moisture, rain, or concrete exposure
- Underground and surface-mounted rigid conduit terminations
- Industrial, commercial, and utility electrical systems requiring concrete-tight seals
- Locations requiring insulated-throat protection per NEC or local electrical codes
Compatibility & Replacements
Compatible With
- Rigid Aluminum Conduit (RAC)
- Rigid Steel Conduit (RSC)
- IMC (Intermediate Metal Conduit)
- Standard electrical enclosures, meter bases, junction boxes, and control panels
- Service entrance conduit systems per NEC Article 225
Replaces / Drop-In Replacement For
- Earlier Bridgeport 152-DC versions
- Generic 3/4″ threaded insulated-throat hubs meeting UL 514B Type 4 specifications
- Verify compatibility with your installer or system designer if replacing hubs from competing manufacturers
Works With
- All industry-standard 3/4″ threaded rigid conduit and IMC systems
- Standard electrical enclosure knockout sizes per NEMA/NEC standards
- Bending or offset nipples (e.g., Bridgeport 1521-DC 3/4″ offset nipple) for angled installations
- Compatible with conduit bushings, locknuts, and other standard rigid conduit fittings
