All general-duty and heavy-duty switches are field convertible to accept Class R fuse clip kits. The kits prevent the installation of Class H and K fuses (one kit required per switch).
Items sold by USABlueBook are intended for use only by professionals in the water and wastewater treatment industry. Many items sold by USABlueBook require supplemental training, licenses or permits for proper use and may be harmful if not used properly.
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