SEPCO 20BI4L Malleable Iron In...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4.16
SEPCO 20BI4L Malleable Iron Insulated Grounding Bushing for Conduit Grounding

SEPCO 20BI4L Malleable Iron Insulated Grounding Bushing for Conduit Grounding

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Model: 20BI4L

In Stock (leaves warehouse same day if ordered before 3pm ET)

$4.16
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SEPCO 20BI4L Malleable Iron Insulated Grounding Bushing for Conduit Grounding

The SEPCO 20BI4L insulated grounding bushing delivers dependable equipment grounding at conduit terminations, built in durable malleable iron for demanding commercial and industrial installations. This SEPCO bushing combines a rugged malleable iron body with an insulated liner that shields conductor insulation from the raw metal edge of the conduit while maintaining a continuous, low-resistance bonding path to ground. It is available in trade sizes ranging from 1/2" through 4" to match a wide range of conduit runs, giving contractors a straightforward, reliable way to terminate raceways at panelboards, enclosures, and equipment housings where code-compliant grounding continuity is required.

Key Features

  • Trade Size Range: Available in trade sizes from 1/2" through 4" to suit a wide range of conduit terminations.
  • Durable Construction: Malleable iron body resists impact, cracking, and corrosion, holding up to the demands of commercial and industrial raceway installations.
  • Insulated Design: An integral insulated liner separates conductor insulation from the metal edge of the conduit, reducing abrasion risk as wires pass through the bushing.
  • Grounding Bushing Function: Terminates conduit runs while bonding the raceway to the equipment grounding system, supporting a continuous path to ground.
  • Malleable Iron Body: The malleable iron construction provides the mechanical strength needed for secure conduit termination at panels and enclosures.
  • Consistent Family Design: Every trade size in the 20BI4L lineup shares the same malleable iron, insulated-liner construction for uniform performance across a job.

Technical Specifications

  • Trade Size: 1/2" - 4"
  • Product Material: Malleable Iron

Typical Applications

  • Conduit and Raceway Grounding Terminations
  • Panelboard and Enclosure Grounding
  • Commercial and Industrial Electrical Installations
  • Equipment Grounding Conductor Bonding
  • Renovation and New Construction Wiring
  • Motor Control Centers and Switchgear Grounding

Why SEPCO?

SEPCO builds its insulated grounding bushings from malleable iron for the strength and corrosion resistance electrical contractors rely on in demanding commercial and industrial environments. Specifying a SEPCO 20BI4L insulated grounding bushing, available across trade sizes from 1/2" through 4", helps electricians maintain a dependable, code-compliant path to ground at every conduit termination on the job. For crews standardizing on a single trusted supplier for conduit termination hardware, SEPCO's malleable iron insulated grounding bushings offer straightforward, consistent performance from job to job across the full 1/2" to 4" size range.

Manufacturer Resources

SEPCO Product Catalog

Product Specs

list_batch:
SEP-20260911
Product Type:
Grounding Bushing
Department:
Electrical
Product Group:
Grounding & Bonding
Product Subgroup:
Grounding & Bonding
Product Material:
Malleable Iron

SEPCO 20BI4L – Frequently Asked Questions

1) What trade sizes does the SEPCO insulated grounding bushing come in?
The SEPCO insulated grounding bushing family runs from 1/2 inch through 4 inch trade size, in ten steps: 1/2, 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, 3-1/2 and 4 inch. The part number changes with the size, so order by size: 20BI4L (1/2), 21BI4L (3/4), 22BI4L (1), 23BI4L (1-1/4), 24BI4L (1-1/2), 25BI4L (2), 26BIOL (2-1/2), 27BIOL (3), 28BIOL (3-1/2) and 29BIOL (4). Every size shares the same malleable iron body and insulated liner.
2) What is the difference between a grounding bushing and a plain insulated bushing?
A plain insulated bushing only protects the conductors from the cut edge of the conduit. The SEPCO 20BI4L does both jobs: the insulated liner keeps conductor insulation off the raw metal edge of the raceway, and the bushing also bonds the conduit to the equipment grounding system to maintain a continuous path to ground. If all you need is wire protection at the termination, a plain insulated bushing will do. If the raceway itself has to be bonded (concentric or eccentric knockouts, oversized openings, service equipment), the grounding version is what you want.
3) Is malleable iron a good choice for a grounding bushing in a damp or industrial environment?
Malleable iron is the body material on the SEPCO 20BI4L, and it was picked for impact and crack resistance plus corrosion resistance in commercial and industrial raceway work. It is the heavier-duty alternative to a die-cast or plastic bushing for panels, motor control centers and switchgear terminations where the fitting takes mechanical abuse.
4) Will this SEPCO bushing thread onto rigid conduit at a panelboard knockout?
Yes. The SEPCO insulated grounding bushing is made to terminate conduit runs at panelboards, enclosures and equipment housings, in trade sizes 1/2 inch to 4 inch. Match the bushing trade size to the conduit trade size, not to the knockout. Threaded conduit terminations such as rigid and IMC are the intended application.
5) Which SEPCO part number do I order for a 2-1/2 inch conduit grounding bushing?
26BIOL is the 2-1/2 inch size. Note the part numbering shifts at that point: 1/2 inch through 2 inch carry the BI4L suffix (20BI4L up to 25BI4L), while 2-1/2 inch through 4 inch carry BIOL (26BIOL, 27BIOL, 28BIOL, 29BIOL). Quote the size as well as the number so you do not get the adjacent fitting.
6) Does the SEPCO grounding bushing have a lug for a bonding jumper?
The SEPCO 20BI4L is an insulated grounding bushing, meaning it terminates the conduit and bonds the raceway to the equipment grounding system to carry a continuous path to ground. Grounding bushings of this type are landed with a bonding jumper run from the bushing to the enclosure ground bar or bus. Size that jumper per the circuit's overcurrent protection in your local code.
7) Can I standardize on one grounding bushing across a whole building job?
That is how the 20BI4L family is built. Every trade size from 1/2 inch through 4 inch uses the same malleable iron body and the same insulated liner construction, so the fitting behaves the same at a 1/2 inch branch termination as it does on a 4 inch feeder. For an MRO stockroom or a contractor keeping a standing kit, you can buy one line across all ten sizes.
How fast can I get the SEPCO 20BI4L 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 20BI4L come with a warranty?
Absolutely. The SEPCO 20BI4L 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 20BI4L?
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 20BI4L from ZenSupply?
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