Black Finish Polycarbonate Miniature Wiring Compartment/ Splicer for Ambiance Wiring. Polycarbonate splicer with cover for connection between transformer extension wire (i.e. Romex) and low voltage cable, or use as a splicer between two sections of low voltage cable. (maximum wattage allowed for 10/2 AWG: 300w at 12v; 500w at 24v max). UL and C-UL listed.