Box Fill Helper!

- Box Fill Helper -The best box fill calculator on the app store This application is perfect for the field professional and the office worker. Box Fill Helper has been designed for conductor sizes 6 AWG - 18 AWG and their connected devices. Junction Box Helper will output a box size per 314.28 of the NEC.NFPA, National Fire Protection Agency, National Electrical Code, NFPA 70, and NEC are registered trademarks of the National Fire Protection Association and are not associated with ReiWare, LLC in any way.