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SEPCO E35 E3 Series Malleable Iron Rigid Conduit Enlarger
The SEPCO E35 E3 Series Malleable Iron Rigid Conduit Enlarger is a malleable iron fitting engineered to step a rigid conduit run up to a larger trade size mid-run, part of SEPCO's E3 Series available in E35 and E36 model configurations to match different trade-size transitions. The E35 configuration enlarges a 1/2-Inch rigid conduit run up to a 3/4-Inch trade size at a single fitting point, while the E36 model provides an additional trade-size step within the same E3 Series line. Threaded hub connections at each trade size give licensed electricians a straightforward, code-compliant way to increase conductor capacity partway through a raceway run without re-running an entirely larger conduit section back to the source, and without tearing out existing wiring to reach it.
Key Features
- Trade Size Transition: The E35 configuration enlarges rigid conduit runs from 1/2-Inch to 3/4-Inch at a single fitting point, while the E36 model provides an additional trade-size step within the same E3 Series line.
- Durable Malleable Iron Construction: Machined from malleable iron for excellent mechanical strength, impact resistance, and long service life in demanding electrical environments.
- Purpose-Built Enlarger Fitting: Designed specifically to increase rigid conduit trade size mid-run, eliminating the need to re-run an entire section of larger conduit from the source point.
- E3 Series Design: Available in E35 and E36 models, engineered for consistent fit and function alongside other compatible SEPCO conduit fittings and bodies.
- Threaded Hub Connections: Threaded hubs at each trade size accept standard rigid conduit for a secure, code-compliant mechanical and electrical connection.
- Professional-Grade Build: Suited for rigid conduit systems in commercial, industrial, and institutional electrical installations where dependable long-term performance is required.
Technical Specifications
- Refer to manufacturer documentation for complete technical specifications.
Typical Applications
- Rigid Conduit Trade Size Transitions
- Commercial and Industrial Electrical Installations
- Conduit and Raceway Systems
- Panelboard and Enclosure Feeder Runs
- Renovation and New Construction Wiring
Why SEPCO?
SEPCO builds its E3 Series conduit fittings from malleable iron to withstand the rigors of professional electrical installations. Whether the application calls for the E35's 1/2-Inch to 3/4-Inch step-up or the E36's alternate trade-size transition, these enlargers give electrical contractors a dependable, code-friendly way to increase conduit trade size mid-run without compromising the mechanical integrity of the raceway. For contractors who need rugged, reliable conduit fittings for commercial and industrial installations, SEPCO's E3 Series delivers consistent fit, finish, and performance across every trade-size transition in the line.
Manufacturer Resources
SEPCO Product Catalog
Product Specs
- list_batch:
- SEP-20260911
- Product Type:
- Reducer
- Series:
- E3 Series
- Connection Type:
- Threaded
- Department:
- Electrical
- Product Group:
- Conduit & Raceway
- Product Subgroup:
- Conduit Fittings
- Product Material:
- Malleable Iron
SEPCO E35 – Frequently Asked Questions
1) What trade size steps does the SEPCO E3 Series conduit enlarger come in?
Two steps. The E35 takes a 1/2 inch rigid conduit run up to 3/4 inch, and the E36 takes 3/4 inch up to 1 inch. Pick the model by the size you are coming from: the smaller hub is the run you are leaving, the larger hub is the size you continue in.
2) Can I use an E35 enlarger to go from 1/2 inch straight to 1 inch conduit?
No. The E35 only steps 1/2 inch to 3/4 inch. To reach 1 inch you would follow it with an E36, which steps 3/4 inch to 1 inch, or run 3/4 inch between the two fittings. There is no single-fitting 1/2 to 1 inch step in the E3 Series.
3) How does the E3 Series enlarger connect to the conduit, and does it work with EMT?
Both hubs are threaded, so the fitting takes threaded rigid conduit on each end. That means standard rigid (RMC) with cut and threaded ends, not plain-end EMT. If your run is EMT you need a set-screw or compression reducing coupling instead, or an adapter to get to threads.
4) Why use a conduit enlarger instead of re-running larger conduit from the panel?
That is exactly the job it does. The enlarger steps the raceway up to the next trade size at one point mid-run, so you gain conductor capacity from that point forward without pulling out the existing wiring or re-running a larger section all the way back to the source. It is common on renovation work where the existing 1/2 inch run is buried or otherwise fine up to a point.
5) Is a conduit enlarger the same thing as a reducing bushing?
No. An enlarger is a threaded body with a hub at each trade size that joins two different sizes of rigid conduit in line, so the raceway itself changes size. A reducing bushing or reducer adapts a larger threaded opening down to a smaller conduit, usually at a box or enclosure hub. If you are changing size in the middle of a rigid run, the E35 or E36 is the fitting; if you are landing a smaller conduit in an oversized enclosure hub, you want a reducing washer or bushing.
6) Which SEPCO E3 model do I order for a 3/4 inch to 1 inch step-up?
The E36. Order by MPN E36 for the 3/4 inch to 1 inch transition; E35 is the 1/2 inch to 3/4 inch version. Both are the same malleable iron threaded design, only the hub sizes differ.
7) What is the SEPCO E35 enlarger made of, and will it hold up in an industrial plant?
Malleable iron. That gives it mechanical strength and impact resistance for exposed rigid conduit in commercial, industrial, and institutional installations where a die-cast fitting can crack if it takes a hit.
How fast can I get the SEPCO E35 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 E35 come with a warranty?
Absolutely. The SEPCO E35 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 E35?
You can call, text, or email our expert support team for fast answers. We’re here to help with
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selection,
installation tips, and troubleshooting. Contact Us
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