NEMA Rated Full Voltage Starters - Magnetic. Field-Installed Modification Kits. For 300-Line Starters. Space Heater Kits. CR305X701 and CR305X702 space heater kits (50 Watts, except size 5 and 6 at 100 Watts) come complete with one NC auxiliary contact, necessary hardware and ready for installation on any NEMA Size 0 through 6 enclosed starter, CR306, CR307, CR308, CR309, CR310, and CR311, or equivalent 200-Line devices. 702D2953