Blackburn 4SBC-B1-5 8 SOL/STR - 4 STR COPPER SPLIT BOLT

The 4SBC-B1-5 is rated for 8 AWG solid or stranded down to 4 AWG stranded copper conductors. Both the run and the tap have to fall inside that range, so it handles the common 8 to 4 copper taps you see on grounding electrode conductors and service tap splices. Anything larger than 4 stranded needs a bigger split bolt.

Yes. The 4SBC-B1-5 is a bare mechanical connector with no insulation of its own, so any splice made on an insulated circuit conductor has to be built back up with rubber splicing tape and vinyl electrical tape, or covered with an insulating cover. On bare grounding and bonding conductors inside an enclosure or ground bar area, no insulation is required.

Copper split bolts like the 4SBC-B1-5 are used for tapping and splicing copper grounding and bonding conductors, and this one covers 8 solid or stranded through 4 stranded, which is the usual size range for grounding electrode conductors on residential and light commercial services. Note that a split bolt is a mechanical connector, not a direct-burial or concrete-encased fitting, so for buried ground rod connections most inspectors want an exothermic weld or a listed direct-burial clamp instead.

A split bolt like the 4SBC-B1-5 joins two copper conductors to each other in line, run to tap, and tightens with a wrench, so no crimping tool or die set is needed and it can be taken apart later. A compression connector needs a hydraulic or battery crimper and is permanent. A lug, by contrast, terminates one conductor onto a bus or pad rather than joining two wires. For a field tap in the 8 through 4 copper range where you want hand tools only, the split bolt is the straightforward choice.

It is sold each, so quantity ordered equals number of connectors. Order one per splice, and remember a single tap point uses one split bolt regardless of how many conductors are being joined within the range.

Country of origin on the 4SBC-B1-5 copper split bolt is India. That matters for buyers working under Buy American or domestic-preference procurement rules on federal and some institutional projects, where an imported connector may not qualify.