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Glossary
NORTH AMERICAN CLASSES OF FUSES
The North American fuse industry has developed a number of Classes
or Standards for fuses with voltage ratings of 600 volts or less.
These classes include basic physical specifications and performance
requirements.
Class CC
600V; up to 30A; 200kA
Cylindrical contact, 10 x 38mm with rejection feature.
Class G
300V; up to 60A; 100kA
Cylindrical contact, 10mm diameter
Class H
250 and 600V; up to 600A; 10kA
NEC dimensions.
Class J
600V; up to 600A; 200kA
Non interchangeable dimensions
Class K
250 and 600V; up to 600A; 50, 100 or 200kA
NEC* dimensions.
Class L
600V; 601 to 6,000A; 200kA
Bolted connections.
Class R
250 and 600V; up to 600A; 200kA.
NEC* dimensions; rejection feature.
Class T
300 and 600V; up top 600A; 200kA
Compact dimensions, fast acting. * NEC dimensions — National
Electric Code dimensions, often referred to as Code Dimensions.
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