NQ and NF Panelboards are versatile panelboards that feature a wide selection of circuit breakers, accessories, and ready to install kits. NQ and NF Panelboards have modular construction to accept field installable accessories and conversion kits. This accessory is a sub feed circuit breaker adapter kit for NQ 400A or 600A panelboards. It is an adapter for PowerPacT L circuit breakers. The circuit breaker is not included.