3/0-1/0AWG Polaris Blue Insulated In-Line Connector - Direct Burial and Submersible Polaris Insul In-Line Splice Connectors are suitable for connecting two wires. Abrasion and chemical resistant. UV rated. Will not support combustion. Cold temperature rated to -45 degrees Celsius. Dual rated for use with copper and/or aluminum cables. 600 volts. Not recommended for fine-stranded, flexible wire (see Polaris Grey Series).