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The ABB TRK12B is a Class R fuse rejection kit rated for 30 amps and 240 volts. Fuse rejection kits are used in fusible disconnect switches and panelboards to enforce Class R fuse-only loading, preventing the installation of lower-interrupting-capacity fuses in circuits that require higher fault protection. This kit physically blocks non-Class-R fuses from seating in the fuse block, making it a code-compliance and safety component. Electricians install this hardware when upgrading or servicing fusible equipment where Class R fuse enforcement is required by the installation design or local electrical authority.
The TRK12B is suited for residential and light commercial electrical distribution equipment where 30A, 240V fusible circuits are present. Common applications include fusible safety switches, disconnect enclosures, and panelboard fuse sections requiring Class R rejection compliance. This component is installed during new equipment setup or during service calls when bringing existing fusible equipment up to current fuse-class standards.
Designed as an OEM-style fuse rejection kit for use in fusible disconnect switches and panelboard fuse sections rated for 30A Class R fuses at 240 volts.
Installation should be performed by a qualified electrician. De-energize and lock out the disconnect or panelboard before servicing fuse blocks or installing rejection hardware, following NFPA 70E lockout/tagout procedures. Verify that the rejection kit is seated fully and securely before restoring power. Inspect the fuse block for damage or corrosion before installing the rejection clip.
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