Technical FAQs

Ask a Question

What Class of fuse does the H221N and H221NRB safety switches accept?

Issue:
Product design feature

Product Line:
Safety Switches

Environment:
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, RFK03L for current Series F5). With Class H or K fuses installed, the switches are UL listed for use on systems with up to 10,000 RMS Symmetrical Amperes available fault current. With Class R fuses (and Class R Fuse Kit installed) the switches are UL 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.
Was this helpful?
What can we do to improve the information ?