Siemens PN1224B1100C PN Series 100 Amp 12-Space 24-Circuit Main Breaker Plug-On Neutral Load Center Indoor with Copper Bus, Grey Siemens introduces PN Series Load Centers - a new high quality and feature-rich line of load center products to meet applications for virtually every need. The PN Series load center provides maximum flexibility in combination with labor saving features to aid the contractor while installing the product. PN load centers accept the Plug-on neutral breakers, patented insta-wire neutral/ground system, convertibility, copper bussing and mounting tabs on the trim - these features were specifically engineered to decrease installation time and increase flexibility. USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.