What Class of fuse does the catalog numbers CH224N and CH224NRB safety switches accept?
Class of Fuses
Heavy Duty Safety Switches
Resolution: These switches accept Class H or K fuses as standard. Options include Class R fuses (field install Class R Fuse Kit HRK1020) and Class J fuses (field relocate the fuse base assembly to alternate position marked in the enclosure). With Class H or K fuses installed, the switches are CSA listed for use on systems with up to 10,000 RMS Symmetrical Amperes available fault current. With Class R fuses (and HRK1020 fuse kit installed) or Class J fuses installed, the switches are CSA listed for use on systems with up to 200,000 RMS Symmetrical Amperes available fault current.
NOTE: DO NOT USE RENEWABLE LINK FUSES IN SQUARE D SAFETY SWITCHES. The use of renewable link fuses may adversely affect user safety, impair reliability and will void the warranty.