You may also like
SEPCO TWH Series Insulated Watertight Conduit Hub, Die-Cast Zinc
The SEPCO TWH Series covers a full line of insulated, watertight conduit hubs machined from durable die-cast zinc, available across trade sizes from 1/2" through 4" (1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", and 4"). Every hub in the family shares the same rugged zinc die-cast body, an insulated throat that shields conductor insulation from abrasion during pulls, and a watertight design that keeps moisture out of enclosures and conduit runs. Each TWH hub provides a threaded connection point for joining conduit to panels, enclosures, and equipment housings, making the series a dependable choice for new construction and retrofit electrical work.
Key Features
- Trade Size Range: Offered in 1/2" through 4" sizes to match conduit runs across a wide range of enclosure and panel connections.
- Threaded Conduit Hub Design: Each TWH hub provides a threaded connection point for joining conduit runs to enclosures, panels, and equipment housings.
- Die-Cast Zinc Construction: A durable die-cast zinc body delivers strength and corrosion resistance for long-term outdoor and industrial use.
- Insulated Throat: The insulated interior helps protect conductor insulation from abrasion and cutting as wires pass through the hub during installation.
- Watertight Sealing: Engineered to create a watertight connection point, helping keep moisture out of enclosures, panels, and conduit runs.
- TWH Series: Part of the SEPCO TWH family of insulated, watertight conduit hubs designed for dependable field performance across every stocked trade size.
- Corrosion-Resistant Body: The zinc die-cast construction stands up to the elements, making it a solid choice for exposed or harsh-environment installations.
Technical Specifications
- Trade Size: 1/2" - 4"
- Series: TWH
Typical Applications
- Outdoor and Wet-Location Conduit Connections
- Commercial and Industrial Electrical Enclosures
- Conduit-to-Enclosure Connections Requiring Insulation
- New Construction and Retrofit Electrical Installations
- Panel and Equipment Housing Conduit Entries
Why SEPCO?
SEPCO builds every hub in the TWH Series from rugged die-cast zinc for lasting durability in demanding electrical environments, across the full 1/2" through 4" size range. The insulated, watertight design reflects a focus on protecting conductors and maintaining a reliable seal at each conduit entry point. For electrical professionals who need a dependable, corrosion-resistant hub for wet or exposed locations, the SEPCO TWH Series offers straightforward, code-conscious performance backed by solid die-cast zinc construction.
Manufacturer Resources
SEPCO Product Catalog
Product Specs
- list_batch:
- SEP-20260911
- Product Type:
- Conduit Hub
- Connection Type:
- Threaded
- Series:
- TWH
- Department:
- Electrical
- Product Group:
- Conduit & Raceway
- Product Subgroup:
- Conduit Fittings
- Product Material:
- Zinc Die-Cast
SEPCO TWH10 – Frequently Asked Questions
1) What trade sizes does the SEPCO TWH conduit hub come in?
Nine trade sizes cover the run from 1/2 inch up to 4 inch: 1/2 (TWH10), 3/4 (TWH20), 1 (TWH30), 1-1/4 (TWH40), 1-1/2 (TWH50), 2 (TWH60), 2-1/2 (TWH70), 3 (TWH80) and 4 inch (TWH100). Order by the trade size of the conduit entering the enclosure, not by the knockout diameter.
2) Can I use a TWH hub on an outdoor enclosure in a wet location?
That is what the TWH Series is built for. The hub forms a watertight connection at the enclosure entry to keep moisture out of the panel and the conduit run, and the die-cast zinc body is corrosion resistant for exposed and outdoor service. SEPCO lists outdoor and wet-location conduit connections among its intended applications.
3) How does the TWH hub attach to a panel or junction box?
It is a threaded connection. The hub threads into the enclosure opening and gives you a threaded conduit entry for joining rigid or IMC conduit to panels, enclosures and equipment housings. There is no clamp or compression body here, so the conduit end and the enclosure opening both need to suit threaded hardware.
4) Can I use a SEPCO TWH hub in place of a PVC-coated Ocal hub on a corrosive outdoor run?
Not as a like-for-like swap in a PVC-coated system. The Ocal HUB112-G is a PVC-coated zinc hub, intended so the coated jacket carries through the fitting on a PVC-coated raceway. The SEPCO TWH hubs are bare die-cast zinc with an insulated throat and a watertight threaded connection, which suits exposed and wet-location enclosure entries on standard threaded conduit. If the specification on the drawing calls for a coated system end to end, match it with the coated hub; if it calls for a watertight zinc hub, the TWH size that matches the conduit is the direct choice.
5) Do I still need a bushing for conductor protection with the SEPCO TWH hub?
No separate insulating bushing is needed at that entry. The TWH throat is insulated, so the conductor insulation is shielded from abrasion and cutting as wires are pulled through the hub. That is the main difference between this and a plain uninsulated hub.
6) Zinc die-cast or PVC-coated hub for a corrosive environment?
The SEPCO TWH body is bare die-cast zinc, corrosion resistant enough for exposed outdoor and industrial work. For wash-down, chemical or coastal service where a jacketed fitting is specified, a PVC-coated hub is the different animal: the Ocal HUB112-G is a PVC-coated zinc hub in 1-1/2 inch. If the drawing calls out PVC-coated conduit and fittings, match it rather than substituting bare zinc.
7) I need conduit hubs in sizes other than 1-1/2 inch. What covers a full size range?
The SEPCO TWH Series runs the full trade size range from 1/2 inch to 4 inch: TWH10 (1/2 inch), TWH20 (3/4 inch), TWH30 (1 inch), TWH40 (1-1/4 inch), TWH50 (1-1/2 inch), TWH60 (2 inch), TWH70 (2-1/2 inch), TWH80 (3 inch) and TWH100 (4 inch). That lets a contractor standardize one insulated watertight hub family across every enclosure entry on a job. The Ocal HUB112-G is a 1-1/2 inch PVC-coated hub, so it answers a single size in a coated system rather than a full-range standardization.
8) Can I standardize on one hub series across a whole building's panels and equipment entries?
Yes, and that is a practical reason to spec the TWH family. Every size from 1/2 through 4 inch shares the same zinc die-cast body, insulated throat and watertight threaded design, so a facility or MRO buyer can stock one series across panel entries, equipment housings and outdoor enclosures and only vary the trade size.
9) Is the TWH hub suitable for retrofitting an existing enclosure entry?
It is used in both new construction and retrofit electrical work. On a retrofit, the deciding factor is the existing opening: the hub threads in, so the enclosure hole has to be the correct knockout size for the trade size you order, and the conduit end has to be threaded.
How fast can I get the SEPCO TWH10 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
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 SEPCO TWH10 come with a warranty?
Absolutely. The SEPCO TWH10 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the SEPCO TWH10?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the SEPCO TWH10 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.