A Splice Connector is an electric connector which allows for two cables or wire leads to connect within the body of the splice. These splices are crimped or soldered such that the power conducted from the source cable to the next cable is transferred at an acceptable conductivity and pull-out resistance performance level. The Glossary of Terms  provides additional information. 

Utilities use Splice Connectors for multiple applications, splicing underground or overhead cable, splicing power generation cables to substation connections, or splicing transformers to power source or use cables. Splice Connectors can also be used to join both very small gauge (36 Gauge to 12 Gauge) wire or large cable ( 8 Gauge to 1000MCM).