Linergy NEMA sectional terminal blocks are for terminating wires in a control panel and are designed to NEMA standards. This terminal block has a flat terminal connector for use with wires that have ring or spade connectors on the end of the wires. Solid or stranded copper wires from #22 through #12 AWG can be used with this terminal block. Each terminal is approved for use with 1 or 2 #12 wires, 1 or 2 #14 wires, 1 or 2 #16 wires, 1 or 2 #18 wires, 1 or 2 #20 wires, or 1 or 2 #22 wires. The nylon block is molded in the natural color of nylon (off white). This block is UL component recognized and CSA certified for up to 40 Amps and up to 600 VAC or VDC. Melting Alloy Thermal Units Provides overload protection for most motors Cannot be reset until cooled Calibration is set for a range of motor full load currents Melting alloy thermal units are available in three designs: standard trip (Class 20) slow trip (Class 30) quick trip (Class 10)