Adjustable Speed Drives, Commercial Buildings, Data Centers, Electric Vehicles, Energy Storage Systems, Battery Protection, Health Care (Reliable Power, Current Limitation, Selective Coordination), Industrial Facilities (Steel Mill, Manufacturing) and Renewable Energy.
How fuses work, fuse construction, UL classifications, and NEMA Published documents.
A fuse is an overcurrent protective device containing a calibrated current-carrying member that melts and opens a circuit under specified overcurrent conditions.
The NEMA Fuse Section develops technical standards and serves as the industry voice for positively impacting product safety and performance requirements, and relevant government relations and trade activities.
The scope of the NEMA Fuse Section includes the following:
For more information go to the NEMA Fuse Page
NEMA Standard for Low Voltage Cartridge Fuses
This standard covers eight classes of low voltage cartridge fuses consisting of a current-responsive element inside a fuse body with contacts on both ends, rated 600 V or less, ac and dc. The classes are G, H, J, K, L, R, T and CC. The document includes definitions, voltage ratings and interrupting rating tables along with the current carrying and temperature rise tests. It can be downloaded here.