Best Split Grounding Bushings for Conduit: Top Picks for 2026
Unified grounding is vital for conduit installations. Split grounding bushings provide a reliable way to protect conductors while enabling easier pulls and adjustable lug connections. This article showcases five highly rated products designed for copper or aluminum conductors, compatible with rigid/IMC or EMT conduit, and built with durable die-cast zinc construction. Each option balances ease of use, insulation, and conductive reliability to help you choose the best split grounding bushing for your project.
| Product | Brand | Size | Notes |
|---|---|---|---|
| COREX 2″ Insulated Split Grounding Bushing | COREX | 2 inches | Adjustable Lay-In Lug; 150°C insulation |
| COREX 5″ Insulated Split Grounding Bushing | COREX | 5 inches | Same dual-rated copper/aluminum; robust die cast zinc |
| COREX 1″ Insulated Split Grounding Bushing | COREX | 1 inch | Compact option with adjustable lug |
| Bridgeport Mighty-Rite SGB-386CL | Bridgeport | 2 inches | Patented insulated split grounding bushing |
| Bridgeport Mighty-Rite SGB-385CL | Bridgeport | 1-1/2 inches | Hinged design; adjustable lug |
The selections above focus on reliability, ease of installation, and compatibility with both rigid/IMC or EMT conduits. Each product listed supports copper or aluminum conductors, and most feature aluminum lay-in lugs or die-cast zinc construction for long-term durability.
COREX 2-Inch Insulated Split Grounding Bushing
Designed for flexible conduit runs, this die-cast zinc bushing provides durable protection with a thermoplastic insulated bushing rated to 150°C. Its aluminum lay-in lug enables quick, adjustable connections, while dual-rating for copper or aluminum conductors expands its application range. Suitable for both rigid/IMC and EMT installations, it supports efficient pulls and secure grounding with consistent performance.
COREX 5-Inch Insulated Split Grounding Bushing
This larger split grounding bushing mirrors the 2-inch model’s build quality with die-cast zinc construction and an adjustable lay-in lug. The 5-inch size is ideal for larger conduit runs or where conduit spacing requires a bigger insulating and grounding interface. It remains dual-rated for copper or aluminum, and the thermoplastic insulation keeps conductors protected up to 150°C. Its robust design supports easier conductor pulling in challenging installations.
COREX 1-Inch Insulated Split Grounding Bushing
The 1-inch COREX model delivers reliable grounding with an adjustable lay-in lug suitable for tight spaces. The zinc die-cast construction ensures longevity, while the thermoplastic insulation is rated up to 150°C. Its compact footprint makes it a practical choice for smaller conduit runs or where space limitations require a lighter, yet sturdy, grounding solution.
Bridgeport Mighty-Rite SGB-383CL 1-Inch
Bridgeport’s SGB-383CL insulates a 1-inch Mighty-Rite with a die-cast zinc housing and a grounding lug designed for ease of wire installation. This model emphasizes versatility in small to intermediate conduit runs, supporting efficient workarounds during pulls or post-pull installations. The part is designed to integrate into standard Mighty-Rite systems, providing dependable grounded connections.
Buying Guide: Key Purchase Considerations and Comparisons
When selecting a split grounding bushing for conduit, consider the following factors to ensure a fit for your project:
- Conduit size and compatibility: Verify the bushing size matches your conduit diameter (1″, 2″, 4″, etc.) and is suitable for rigid/IMC or EMT configurations.
- Material and durability: Die-cast zinc housings offer strength and corrosion resistance; ensure the insulation and lug materials tolerate the environment (temperature, humidity, exposure).
- Conductor compatibility: Most bushings are dual-rated for copper or aluminum conductors. Confirm the rating applies to your installation.
- Lug design and adjustability: An adjustable lay-in lug simplifies conductor insertion and alignment, reducing pull friction and rework.
- Thermoplastic insulation rating: A higher temperature rating (e.g., 150°C) provides greater safety in heat-generating installations.
- Installation sequencing: Some bushings are designed to be installed before a wire pull; others after. Consider your workflow to minimize rework.
- Size vs. pull requirements: Larger sizes reduce resistance during pulling but may be heavier and space-consuming; balance pull ease with routing constraints.
- Cost vs. longevity: While premium models may incur higher upfront costs, they often deliver longer service life and fewer maintenance issues in challenging environments.
In summary, the five selected products deliver a balance of size options (1″, 2″, and 5″), robust die-cast zinc construction, and adjustable grounding lugs suitable for copper or aluminum conductors. Consider your conduit type, conductor gauge, and installation sequence to identify the best match for your project.