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The addition is a 3⁄16-inch (4.8 mm) diameter round or U-shaped ground pin, 1⁄8 in (3.2 mm) longer than the power blades (so the device is grounded before the power is connected) and located from them by 1⁄4 in (6.4 mm) edge-to-edge or 15⁄32 in (11.9 mm) center-to-center. 1-15P plugs have two parallel flat blades, 1⁄4 inch (6.4 mm) wide, 0.06 inches (1.5 mm) thick, 5⁄8-23⁄32 inch (15.9-18.3 mm) long, and spaced 1⁄2 inch (12.7 mm) apart. The plugs can be detached from the receptacles by pulling back on the plug body. A TRIO OF AMATEUR PRINTERS: The Kodak Amateur Printer is seen on eBay from time-to-time and can usually be purchased for $10-40 or so depending on condition. NEMA 6 devices, while specified as 250 V, may be used for either 208 or 240 V circuits, generally depending on whether the building has a three-phase or split-phase power supply, respectively.

Depending on local code, replacement with a "repair" approved non-grounded receptacle may be sufficient. This extends the repair period and increases costs. 1-15R receptacles have been prohibited in new construction in the United States and Canada since 1962, but remain in many older buildings, and this obsolete design is still available for repair use only. In addition to the dangers of breaking a ground connection, removing the ground pin to make it fit a 1-15R receptacle or extension cord, may result in the live-neutral polarity being lost. NEMA standards exist for 1-15P, 1-20P and 1-30P plugs, what is electric cable and the 1-15R receptacle. Neither NEMA nor the US National Electrical Code nor the Canadian Electrical Code specify a preferred orientation, but the National Electrical Contractors Association's National Electrical Installation Standards (NECA 130-2010) specify that the preferred location of the ground is on top. Standards permit ungrounded plugs where the appliance does not require grounding due to low risk of leakage current, such as on double-insulated devices.

This "2-prong" design, with two flat parallel non-coplanar blades and slots, is used in most of North America and on the east coast of South America on lamps; consumer electronics such as clocks, radios, and battery chargers; and other double-insulated small appliances that do not require grounding (earthing). These are still used in consumer units in some parts of the world, but are becoming less common. In stage lighting for film and theater, this connector is sometimes informally known as PBG (Parallel Blade with Ground), U-ground, Edison or Hubbell, the name of a common manufacturer. Replacement of obsolete NEMA 1 receptacles requires either rewiring with an additional ground conductor for a NEMA 5 receptacle, or a NEMA 5 receptacle complete with a ground fault circuit interrupter for two-wire non-grounded configurations (when a ground conductor is not available). A streetlight. - A single-phase secondary distribution circuit (fed from a transformer offscreen to the right) whose sole purpose is to provide power for the streetlight. Blade type fuses often require the use of a special purpose extractor tool to remove them from the fuse holder. The fuse elements may be shaped to increase heating effect.

BS 1362 fuse. The Institution of Engineering and Technology also published information on the extent of the problem with on-line retailers, many advertising replacement cord sets, mobile device chargers, and travel adaptors fraudulently marked BS 1363, and mentioning the same sites. In older plug designs both blades were the same width, so the plug could be inserted into the receptacle either way around. Identically to the NEMA 3 series, this is "reserved for future configurations" and no designs for this series exist and no devices have been manufactured. This series of devices is specified for 600-volt, two-wire, non-grounding devices. All NEMA 2 devices are two-wire non-grounding devices (hot-hot) rated for 250 V maximum. All NEMA 1 devices are two-wire non-grounding devices (hot-neutral) rated for 125 V maximum. • The pairs are covered in a foil or braided mesh, as well as outer PVC jacket. Because of the reputation of these listing agencies, the "authority having jurisdiction" ( or "AHJ" - as they are commonly known) usually will quickly accept any device, appliance, or piece of equipment having such a label, provided that an end user or installer uses the product in accordance with manufacturer's instructions and the limitations of the listing standard.