Thomas & Betts H300A 3 Inch NPT Aluminum Hub Connector with Screw Connection
Professional electrical connection solution for protective metallic hose applications
The Thomas & Betts H300A Hub Connector delivers reliable electrical connections with its 3 inch NPT threaded design and aluminum construction. This straight hub connector features screw connection to housing with thread type, providing secure attachment for protective metallic hose systems. UL E23018 and CSA listed for professional installations with 105 degrees C temperature rating.
Professional Features & Benefits
- 3 Inch NPT Threading: Standard sizing ensures compatibility with common protective metallic hose systems and electrical enclosures.
- Aluminum Construction: Lightweight yet durable material provides corrosion resistance and long-term reliability in electrical applications.
- Screw Connection Design: Secure threaded attachment method ensures reliable connection to housing and prevents loosening over time.
- UL E23018 & CSA Listed: Third-party safety certifications verify compliance with electrical safety standards for professional installations.
- 105�C Temperature Rating: High temperature tolerance accommodates demanding electrical environments and heat-generating equipment.
- Straight Configuration: Direct connection path minimizes installation complexity and maintains optimal conductor routing.
Technical Specifications
- Connection Type Screw Connection To Housing: Thread
- Department: Electrical
- Etim: EC001180 Screw connection for protective metallic hose
- Material: Aluminum
- Material Housing: Other
- Nominal Size In Inch: 3 inch
- Outer Dimensions Inches: 8.2x4.3x7
- Outer Quantity: 2
- Product Details: Hub Connector
- Product Group: Connectors
- Product Model: Straight
- Product Subgroup: Electrical Connectors
- Product Type: Hub Connector
- Revolving Thread: N
- Standard: UL E23018, CSA
- Temperature Rating: 105 Degrees C
- Thread Type: NPT
- Unspsc: 39121311 Electrical fittings
- Weight Uom: 0.98 lbs. Each
Professional Applications
- Industrial electrical installations requiring protective metallic hose connections
- Commercial facility electrical systems with conduit protection needs
- Manufacturing environments with temperature-sensitive electrical connections
- Electrical panel and enclosure connections in demanding environments
- Professional electrical contractor installations requiring UL listed components
- Maintenance and repair applications for existing electrical connector systems
Why Choose Thomas & Betts Quality?
Thomas & Betts delivers professional-grade electrical connectors with UL E23018 and CSA certifications, ensuring reliable performance in demanding applications. The aluminum construction and 105�C temperature rating provide durability and safety for long-term electrical installations.
Manufacturer Resources
Spec Sheet
Product Specs
- Connection Type Screw Connection To Housing:
- Thread
- Etim:
- EC001180 Screw connection for protective metallic hose
- Material Housing:
- Other
- Nominal Size In Inch:
- 3 inch
- Outer Dimensions Inches:
- 8.2x4.3x7
- Outer Quantity:
- 2
- Product Group:
- Conduit & Raceway
- Revolving Thread:
- N
- Standards:
- UL E23018, CSA
- Temperature Rating:
- 105 Degrees C
- Thread Type:
- NPT
- Unspsc:
- 39121311 Electrical fittings
- Weight Uom:
- 0.98 lbs. Each
- Department:
- Electrical
- Product Subgroup:
- Conduit Fittings
- Product Type:
- Conduit Hub
- Product Model:
- Straight
- Product Details:
- Hub Connector
- Product Material:
- Aluminum
Thomas & Betts H300A – Frequently Asked Questions
1) Will the Thomas & Betts H300A hub thread into a 3 inch NPT enclosure opening?
Yes. The H300A is a 3 inch nominal hub with NPT threading, so it mates with 3 inch NPT conduit or enclosure threads. It is a straight (not angled) hub, so the conduit run leaves the box in line with the opening.
2) Is the H300A hub UL listed for a permitted commercial installation?
Yes, it is listed under UL E23018 and also CSA listed, which covers most commercial and industrial inspection requirements for a threaded hub connector.
3) What looks like a substitute for the H300A hub but will not install the same way?
The Square D B125 Series hub is a bolt-on hub, so it fastens to the enclosure with bolts rather than threading into the opening. The H300A connects by thread as a screw connection to the housing, so the two are not interchangeable in the same prep. If the existing hole was prepped for a screw-on hub, stay with the threaded H300A.
4) What is the closest equivalent to the Thomas & Betts H300A threaded conduit hub from another manufacturer?
The Crouse-Hinds Myers Scru-Tite basic hub is the closest counterpart in concept: both are screw-on threaded conduit hubs rather than bolt-on types. The H300A is a 3 inch NPT straight hub in aluminum rated 105 degrees C, while the Scru-Tite hub is zinc die-cast. If you are matching an existing aluminum fitting run or need the aluminum material called out on the drawing, the H300A is the one that holds that spec.
5) If the enclosure opening is a knockout that needs a raintight seal outdoors, is the H300A the right hub or should I use something else?
The H300A is a straight NPT threaded hub with a screw connection to the housing, and its published standards are UL E23018 and CSA. For an opening where the specification calls out a raintight hub by name, the ABB TC Series universal raintight conduit hub is the interchangeable-style option, and the Square D B125 Series bolt-on hub is specified as rainproof. Choose the H300A when you want a threaded screw-on hub in aluminum at 3 inch NPT.
6) Is the H300A hub aluminum or steel, and will it hold up outdoors?
The housing is aluminum, which gives you corrosion resistance and less weight than a steel or zinc hub. Each piece runs 0.98 lbs. If you specifically need a steel-bodied hub, American Fittings' AH alloy steel insulated throat hub is the spec-grade alternative we carry.
7) What temperature can a 3 inch aluminum conduit hub like the H300A take?
It carries a 105 degrees C rating, so it is suited to heat-generating equipment and hot enclosure locations. That rating, plus the UL E23018 and CSA listings, is what inspectors typically want to see on an industrial panel connection.
8) What are the alternatives to the T&B H300A for hubbing a 3 inch opening?
Three others we carry take different approaches. Crouse-Hinds Myers Scru-Tite is a zinc die-cast screw hub. ABB's TC Series is a universal raintight interchangeable hub. Square D B125 Series bolts on rather than threading in. The H300A itself is the aluminum, 105 C rated, UL and CSA listed screw hub.
9) I need an insulated throat on the hub for conductor protection - does the H300A offer that or is there another option?
The American Fittings AH is an alloy steel insulated throat hub supplied with a locknut and listed as spec-grade, so that is the one to specify when an insulated throat is required at the opening. The Thomas & Betts H300A is an aluminum straight NPT hub rated to 105 degrees C, suited where the aluminum body and the temperature rating are the driving requirements.
10) How many H300A hubs come in a pack?
They ship two to the outer carton, with the carton measuring 8.2 x 4.3 x 7 inches. If you are hubbing several enclosures on one job, order in multiples of two to avoid a split pack.
11) What is the Thomas & Betts part number for the 3 inch aluminum hub connector?
H300A is the manufacturer part number, and it is sold as a single model with no finish or size options to specify.
How fast can I get the Thomas & Betts H300A delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Thomas & Betts H300A come with a warranty?
Absolutely. The Thomas & Betts H300A is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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