Attributes . The Polaris ISPB350-4 Multi-Tap Direct Burial Single-Sided Entry Connector features 4 ports sized for 350 MCM - 12 AWG wires. The body is made from aluminum alloy wrapped in a layer of high-dielectric strength rubber insulation. Each single-sided port is pre-loaded with an oxide inhibitor, with removable access plugs over the hex screws used to tighten the radial-tipped set screws. Rated for temporary submersion, wet or damp locations and direct burial applications. Installs with a hex key and torque wrenc . Names