// CODE SNIPPET
250.114 Equipment Connected by Cord and Plug
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Exposed, normally non—current-carrying metal parts of cord-and-plug-connected equipment shall be connected to the equipment grounding conductor under any of the following conditions:
Exception: Listed tools, listed appliances, and listed equipment covered in 250.114(2) through (4) shall not be required to be connected to an equipment grounding conductor where protected by a system of double insulation or its equivalent. Double insulated equipment shall be distinctively marked.
- In hazardous (classified) locations (see Articles 500 through 517)
- Where operated at over 150 volts to ground
Exception No. 1 to (2): Motors, where guarded, shall not be required to be connected to an equipment grounding conductor.Exception No. 2 to (2): Metal frames of electrically heated appliances, exempted by special permission, shall not be required to be connected to an equipment grounding conductor, in which case the frames shall be permanently and effectively insulated from ground.
- In residential occupancies:
- Refrigerators, freezers, and air conditioners
- Clothes-washing, clothes-drying, and dish-washing machines; ranges; kitchen waste disposers; information technology equipment; sump pumps; and electrical aquarium equipment
- Hand-held motor-operated tools, stationary and fixed motor-operated tools, and light industrial motor-operated tools
- Motor-operated appliances of the following types: hedge clippers, lawn mowers, snow blowers, and wet scrubbers
- Portable handlamps
- In other than residential occupancies:
- Refrigerators, freezers, and air conditioners
- Clothes-washing, clothes-drying, and dish-washing machines; information technology equipment; sump pumps; and electrical aquarium equipment
- Hand-held motor-operated tools, stationary and fixed motor-operated tools, and light industrial motor-operated tools
- Motor-operated appliances of the following types: hedge clippers, lawn mowers, snow blowers, and wet scrubbers
- Portable handlamps
- Cord-and-plug-connected appliances used in damp or wet locations or by persons standing on the ground, standing on metal floors, or working inside of metal tanks or boilers
- Tools likely to be used in wet or conductive locations
Exception: Tools and portable handlamps and portable luminaires likely to be used in wet or conductive locations shall not be required to be connected to an equipment grounding conductor where supplied through an isolating transformer with an ungrounded secondary of not over 50 volts.
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