The locations requiring tamper-resistant receptacles have been expanded, as have the types of receptacles requiring such protection. Nonlocking-type 15A and 20A, 125V and 250V receptacles in the following areas must be listed as tamper resistant: Author’s Comment: On a tamper-resistant receptacle, inserting an object into one side of the receptacle doesn’t open the internal tamper‑resistant shutter. Simultaneous pressure from a 2- or 3-pronged plug is required for ...

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