Attachment Plugs & Appliances

All 15- and 20-ampere attachment plugs and connectors must be constructed so that there are no exposed current-carrying parts except the prongs, blades, or pins. Attachment plugs must be installed so that their parts are not energized unless they are inserted into an energized receptacle.

No receptacles should require an energized attachment plug as its source of supply, and non-grounding-type receptacles and connectors cannot be used for grounding-type attachment plugs.

Appliances

Appliances may have no live parts that are typically exposed to contact other than open-resistance heating elements, such as the heating elements of a toaster, which are necessarily exposed.

Each appliance must have a means to disconnect it from all ungrounded conductors. If an appliance is supplied by more than one source, the disconnecting device must be grouped and identified.

Each electrical appliance must be provided with a nameplate giving the identifying name and the rating in volts and amperes, or in volts and watts. If the appliance is to be used on a specific frequency or frequencies, or if motor overload protection external to the appliance is required, the appliance must be marked as such.

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