polarity plug

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• Polarity symbols — Many electrical devices use direct current (DC) power, often provided by a AC (alternating current) to DC adapter, also known as a wall wart. The polarity of the adapter cord must match the polarity of the device, meaning that the positive… …   Wikipedia

• DC connector — A DC connector (or DC plug, for one common type of connector) is an electrical connector for supplying direct current (DC) power. Unlike domestic AC power plugs and sockets, DC connectors are not generally standardized. The dimensions and… …   Wikipedia

• NEMA connector — Twist lock connector redirects here. For the device used in intermodal shipping, see Twistlock. Ungrounded and grounded power plugs …   Wikipedia

• SMA connector — SMA ( SubMiniature version A ) connectors are coaxial RF connectors developed in the 1960s as a minimal connector interface for coaxial cable with a screw type coupling mechanism. The connector has a 50 Ω impedance. It offers excellent electrical …   Wikipedia

• Test and tagging — is a generic name given to the process of visually inspecting and electrically testing in service electrical equipment for personal use and/or safety. Colloquially, it is also referred to as; tagging, test tag, test and tag, electrical tagging,… …   Wikipedia

• AC power plugs and sockets — See also: Industrial and multiphase power plugs and sockets Plugs and sockets may sometimes combine male and female contacts, but t …   Wikipedia

• TRS connector — 1⁄4 in TRS connector Trip …   Wikipedia

• Modular connector — This article is about modular connectors. For the registered jack (RJ) wiring standard, see registered jack. Left to right, modular connectors: 8P8C plug, 6P6C plug, 6P4C plug, 4P4C plug, 6P6C jack …   Wikipedia

• Coaxial power connector — Most common coaxial power connector, male and female, 5.5 x 2.5 mm …   Wikipedia

• Oscilloscope — This article is about current oscilloscopes, providing general information. For history of oscilloscopes, see Oscilloscope history. For detailed information about various types of oscilloscopes, see Oscilloscope types. Illustration showing the… …   Wikipedia

• Nickel-metal hydride battery — Batteries caption=Modern, high capacity NiMH rechargeable batteries EtoW=30–80 Wh/kg EtoS=140–300 Wh/L PtoW=250–1000 W/kg CtoDE=66% [http://www.powerstream.com/NiMH.htm] EtoCP=2.75 Wh/US$ [ [http://www.powerstream.com/NiMH.htm NiMH Battery… …   Wikipedia