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What is the rating of the number of switching operations of Square D, 100 A, heavy duty, F-Series safety switches?

Issue:
100A, Heavy Duty, F-Series Safety Switches number of switching operations.

Product Line:
Safety Switch

Resolution:
For Safety Switches, the standard for design and testing of the number of switching operations is governed by UL98 and NEMA KS-1.There are two separate tests: (1) Endurance Test, and (2) Horsepower-overload test. The below table shows the minimum number of operations required (OFF to ON to OFF) by UL and NEMA. For the endurance test, however, Square D 100A F-Series Safety Switches exceed the UL and NEMA requirements by more than 3 times the total (see below table):
100A, Square D Heavy Duty Safety Switches (F-series)
Endurance Test - Number of OperationsHP Test - Number of Operations
Test StdsRated Load*No LoadTotal (Load + No Load)at rated HP**
UL600040001000050
NEMA700070001400050
Square D7000430005000050
* Endurance test performed at switch rated load current
** Horsepower test - make/break motor inrush/locked rotor current at rated HP

Number of switching operations for other Heavy Duty Safety Switches:
For 30-60A series F Heavy Duty safety switches, see FA99746
For 200A series F Heavy Duty safety switches, see FA99791
For 400A series E Heavy Duty safety switches, see FA99792
For 600A series E Heavy Duty safety switches, see FA99819
For 800A series E Heavy Duty safety switches, see FA99821
For 1200A series E Heavy Duty safety switches, see FA99822

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