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What class of fuses does the QMB223TW, QMB223HW, QMB323TW and QMB323HW accept?

Issue:
Product Design Features

Product Line:
QMB Branch Switches

Environment:
Fuses.

Cause:
Application

Resolution:
These QMB switches will accept Class H or K fuses as standard and Class R fuses with the field install Class R Fuse Kit, part # QMB100R. 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.
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