Grace Engineered Products’ ChekVolt allows for NEMA 12/4/4X installations and is designed to increase electrical safety by diminishing the risk of arc flash. ChekVolt provides maintenance personnel a no-touch voltage portal on the outside of electrical enclosures. The ChekVolt interface, which is externally mounted on and internally wired to an electrical panel, allows maintenance personnel to use a non-contact voltage detector “pen” to verify line voltage before and after opening a main disconnect.