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2. NEMA connector - Wikipedia

   en.wikipedia.org/wiki/NEMA_connector

   Depending on local code, replacement with a "repair" approved non-grounded receptacle may be sufficient. The Japanese plug and socket with narrow insulating faces appear and work physically identical to NEMA 1-15, and such non-grounded receptacles are still common in Japan (though grounded 5-15R and 5-20R receptacles are slowly becoming more ...

3. Fuse cutout - Wikipedia

   en.wikipedia.org/wiki/Fuse_cutout

   In electrical distribution, a fuse cutout or cut-out fuse (often referred to as a cutout) is a combination of a fuse and a switch, used in primary overhead feeder lines and taps to protect distribution transformers from current surges and overloads. An overcurrent caused by a fault in the transformer or customer circuit will cause the fuse to ...

4. Resettable fuse - Wikipedia

   en.wikipedia.org/wiki/Resettable_fuse

   A resettable fuse or polymeric positive temperature coefficient device (PPTC) is a passive electronic component used to protect against overcurrent faults in electronic circuits. The device is also known as a multifuse or polyfuse or polyswitch .