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The NEMA 1-15P is a 2 Wire 2 Blade ungrounded plug rated at 125V and 15 Amps in North America. The plug will have two parallel flat blades, 1⁄4 inch (6.35 mm) wide, 0.06 inches (1.524 mm) thick, 5⁄8–23⁄32 inch (15.875–18.256 mm) long, and spaced 1⁄2 inch (12.7 mm) apart. The use of NEMA 1-15R (the receptacle matching the 1-15P) is discontinued in new home installations in the U.S (since 1962). NEMA 1-15P are compatible with the NEMA 5-15R outlet. This plug can be "polarized" or "non-polarized", a polarized 1-15P will have unequal blades to prevent harm to devices attached.
What does the NEMA 1-15P Plug Into?
|The NEMA 1-15P connects to the standard NEMA 5-15/5-20R Wall outlet located in all new residential buildings in North America. It also connects to older non grounded 1-15R wall outlets located in order buildings that is currently not permitted for new construction. If you look closely you can see that the left (neutral) slot is slightly taller than the one to the right. This is for polarity purposes when connecting the NEMA 1-15P.|
What is the difference between polarized and non-polarized NEMA 1-15P?
|To tell the difference between the Polarized and unpolarized NEMA 1-15P you will have to look at the two pins. A polarized plug will have two pins like the non polarized, but the neutral blade will have a slightly "bulbed" end that is roughly 5/16" wider than the line blade. This forces polarity when connecting to a wall outlet.|
The NEMA 1-15 Series are 2 prong, ungrounded cords which are commonly found in North America powering lamps, clocks, radios, battery chargers and other double insulated consumer electronics that don't require grounding. Due to advances in grounding safety standards, the NEMA 1-15R (receptacle) was prohibited from new construction in the United States and Canada in 1962 and has since been replaced by the NEMA 5-15R (receptacle) which is backwards compatible with the 1-15P (ungrounded plug). Due to its plug shape, the 1-15P can be plugged in either way, so in some cases polarity must be established when the device distinguishes between the line and neutral conductors. This is done by making the neutral blade 1/16in bigger than the line blade to prevent reverse connection.
Japan has similar plug and receptacle which is easily mistaken for its appearance and functionality, however it is tested and approved by either METI or JIS and is not certified for use in North America.
The IEC 60320 C7 is an ungrounded 2 Wire connector rated up to 250V and 2.5 Amps Internationally or 125V and 10 Amps in North America. This connector is commonly used to connect power to a device that does not require a ground because of double insulating material which prevents the user of the device from being electrocuted. The C7 mates with a C8 inlet, and is commonly used for laptop power supplies, video game consoles, televisions, and other double-insulated small appliances. This connector is sometimes referred to as a "Figure-8" or "Shotgun" connector due to it's shape. A variation of the C7 exists, sometimes referred to as a C7P or C7 Polarized, although it is not documented in the IEC 60320 standard. The C7P has one square side and one circular side so the connector only mates with the inlet using the correct pin configuration.
How to tell the difference between Polarized vs. Unpolarized? What does the C7 Connect to?
The Polarized C7 Connector/ Polarized C8 Inlet will have a squared off side that will force polarity. In other words, if a device is not internally engineered to accept the line/ load in either orientation, the device will be wired with the polarized C8.
The Non Polarized C7 & Non Polarized C8 Inlet can be identified by a "shotgun" look, with symmetrical sides that allow the user to plug in the connector in either orientation because of superior internal wiring.
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