A split bolt connector (often called a "BUG") is a heavy-duty, reusable mechanical fastener designed to join two or more electrical conductors together. It consists of a threaded bolt with a longitudinal split (slot) in the shank and a tightening nut that clamps the wires against a pressure bar, ensuring a high-conductivity, corrosion-resistant connection without the need for specialized crimping
Split bolt connectors are essential in power distribution and grounding systems for their versatility and mechanical strength. They are primarily used for splicing, tapping, or terminating conductors where a secure, permanent, yet adjustable joint is required.
Key Features & Material Types
- Copper & Bronze Alloy: Standard unplated high-strength bronze is used for copper-to-copper connections, offering excellent conductivity and durability.
- Tin-Plated Options: These feature a tin coating to prevent galvanic corrosion, making them dual-rated for copper-to-aluminum and aluminum-to-aluminum connections.
- Range & Sizing: They accommodate a vast range of wire sizes, typically from 6 AWG to 1000 MCM. A single connector can often handle multiple wires of varying sizes within its specified range.
- Standards: Most high-quality split bolts are UL 486A-486B listed, ensuring they meet strict safety requirements for mechanical strength and electrical performance.
Common Applications
- Grounding & Bonding: Connecting grounding wires to earth rods, building steel, or fences.
- Service Entrances & Feeders: Ideal for residential and industrial power distribution where compact, high-pressure joints are needed.
- Direct Burial: Specialized copper split bolts are rated for burial in earth or concrete when used with proper insulation tape
