QON OEM mounting bases are for the mounting of plug on QO, QO GFI and QO EPD circuit breakers. These OEM mounting bases are available in single and three phase versions. This QOMB1 OEM plug on mounting base is for single phase breaker up to 70 A at 240 VAC max. This base provides 10 kA breaking capacity based on the circuit breakers installed. This mounting base has 1 space for a 1 pole breaker. A neutral assembly is not supplied with this OEM mounting base. The mounting base will accept 14 AWG to 4 AWG copper or 12 AWG to 2 AWG aluminum wire. This mounting base comes in a box with 100 mounting bases.