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Twist-lock Connector
NEMA connectors are power plugs and sockets used for AC mains electricity in North America and other countries that use the standards set by the US National Electrical Manufacturers Association. NEMA wiring devices are made in current ratings from 15 to 60 amperes (A), with voltage ratings from 125 to 600 volts (V). Different combinations of contact blade widths, shapes, orientations, and dimensions create non-interchangeable connectors that are unique for each combination of voltage, electric current carrying capacity, and grounding system. NEMA 1-15P (two-pole, no ground) and NEMA 5-15P (two-pole with ground pin) plugs are used on common domestic electrical equipment, and NEMA 5-15R is the standard 15-ampere electric receptacle (outlet) found in the United States, and under relevant national standards, in Canada ( CSA C22.2 No. 42), Mexico (-J-163-ANCE) and Japan ( JIS C 8303). Other plug and receptacle types are for special purposes or for heavy-duty applications. The d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recreational Vehicles
A recreational vehicle, often abbreviated as RV, is a motor vehicle or trailer that includes living quarters designed for accommodation. Types of RVs include motorhomes, campervans, coaches, caravans (also known as travel trailers and campers), fifth-wheel trailers, popup campers, and truck campers. Typical amenities of an RV include a kitchen, a bathroom, and one or more beds. RVs can range from utilitarian – containing only sleeping quarters and basic cooking facilities – to luxurious, with features like air conditioning (AC), water heaters, televisions and satellite receivers, and quartz countertops. Types RVs can be either trailers that are towed by vehicles or vehicles that can be driven themselves. Most RVs have one level, but there are also some with two levels. To save space while traveling, larger RVs often have slide-outs or canopies that open up when parked. RVs that can be driven can be categorized "motorhomes", which will have the engine in front, whe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NEMA 1-20P
NEMA connectors are AC power plugs and sockets, power plugs and sockets used for alternating current, AC mains electricity in North America and other countries that use the standards set by the US National Electrical Manufacturers Association. NEMA wiring devices are made in electric current, current ratings from 15 to 60 amperes (A), with voltage ratings from 125 to 600 volts (V). Different combinations of contact blade widths, shapes, orientations, and dimensions create non-interchangeable connectors that are unique for each combination of voltage, electric current carrying capacity, and Ground (electricity), grounding system. NEMA 1-15P (two-pole, no ground) and NEMA 5-15P (two-pole with ground pin) plugs are used on common domestic electrical equipment, and NEMA 5-15R is the standard 15-ampere electric receptacle (outlet) found in the United States, and under relevant national standards, in Canada (Canadian Electrical Code, CSA C22.2 No. 42), Mexico (-J-163-ANCE) and Japan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NEMA 1-15P
The National Electrical Manufacturers Association (NEMA) is the largest trade association of electrical equipment manufacturers in the United States. Founded in 1926, it advocates for the industry and publishes standards for electrical products. Notably, the form of US household electrical outlets and plugs is specified by NEMA. Description It was founded in 1926 and maintains its headquarters in Rosslyn, Virginia, in the Washington metropolitan area. Its approximately 350 member companies manufacture products used in the generation, transmission, distribution, control, and end use of electricity. These products are used in utility, industrial, commercial, institutional, and residential applications. The association's Medical Imaging and Technology Alliance (MITA) division represents manufacturers of cutting-edge medical diagnostic imaging equipment including MRI, CT, x-ray, and ultrasound products. Other major end markets include building systems, electrical infrastructure, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volt
The volt (symbol: V) is the unit of electric potential, Voltage#Galvani potential vs. electrochemical potential, electric potential difference (voltage), and electromotive force in the International System of Units, International System of Units (SI). Definition One volt is defined as the electric potential between two points of a electrical conductor, conducting wire when an electric current of one ampere dissipates one watt of power (physics), power between those points. It can be expressed in terms of SI base units (metre, m, kilogram, kg, second, s, and ampere, A) as : \text = \frac = \frac = \frac = \text\text^2\text^. Equivalently, it is the potential difference between two points that will impart one joule of energy per coulomb of charge that passes through it. It can be expressed in terms of SI base units (metre, m, kilogram, kg, second, s, and ampere, A) as : \text = \frac = \frac = \frac = \text\text^2\text^. It can also be expressed as amperes times ohms (curre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westford Academy
Westford Academy is the public high school for the town of Westford, Massachusetts, United States. It was incorporated in 1792 and is one of the oldest public high schools in the United States. History Westford Academy (WA) was founded as a private school in 1792, "for children 'of any nation, age, or sex.'" As long as students could read the Bible and pay the required 9 shillings a term, both boys and girls were allowed to attend. WA became a public school in 1928 after a town meeting vote on April 30, 1928, when " e residents of Westford agreed to purchase the “Westford Academy” from the Trustees of the academy." A group of trustees has been retained to this day, and they bestow scholarships upon graduating seniors at an annual ceremony in May. There have been four Westford Academy buildings: * First Westford Academy building (1794-1896) on Boston Road. This building currently serves as the Westford Museum. * Second Westford Academy Building (1897-1955) on Main ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emergency Evacuation
Emergency evacuation is an immediate egress or escape of people away from an area that contains an imminent threat, an ongoing threat or a hazard to lives or property. Examples range from the small-scale evacuation of a building due to a storm or fire to the large-scale evacuation of a city because of a flood, bombardment or approaching weather system, especially a tropical cyclone. In situations involving hazardous materials or possible contamination, evacuees may be decontamination, decontaminated prior to being transported out of the contaminated area. Evacuation planning is an important aspect to mitigat the impact of disasters on humans. Today there many Evacuation model, evacuation models to simulate this process for small-scale and large-scale situations. Reasons Evacuations may be carried out before, during, or after disasters such as: * Natural disasters ** Eruptions of volcanoes ** Tropical cyclones ** Floods ** Earthquakes ** Tsunamis ** wildfire, Wildfires/Bushfi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Spark
An electric spark is an abrupt electrical discharge that occurs when a sufficiently high electric field creates an Ionization, ionized, Electric current, electrically conductive channel through a normally-insulating medium, often air or other gases or gas mixtures. Michael Faraday described this phenomenon as "the beautiful flash of light attending the discharge of common electricity". The rapid transition from a non-conducting to a conductive state produces a brief emission of light and a sharp crack or snapping sound. A spark is created when the applied electric field exceeds the dielectric strength, dielectric breakdown strength of the intervening medium. For air, the breakdown strength is about 30 kV/cm at sea level. Experimentally, this figure tends to differ depending upon humidity, atmospheric pressure, shape of electrodes (needle and ground-plane, hemispherical etc.) and the corresponding spacing between them and even the type of waveform, whether sinusoidal or cosine-rec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Internet Challenges
This is a list of Internet challenges. Charity * Book Bucket Challenge – It went viral on social media during August–September 2014. The original Ice Bucket Challenge involved participants pouring a bucket of ice over their head or donating money to the ALS Association. The Book Bucket Challenge involves people sharing the names of 10 books that inspired them on their social networking pages or donating books to the needy and sharing those photos with friends on social networking sites. * Food stamp challenge, Food Stamp or SNAP Challenge – a trend in the United States popularized by religious groups, community activists and food pantry, food pantries, in which a family of Wealth, means chooses to purchase food using only the monetary equivalent of what a family that size would receive in the Federal government of the United States, US federal government Supplemental Nutrition Assistance Program (SNAP), colloquialism, colloquially called Supplemental Nutrition Assistanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internet Phenomenon
Internet phenomena are social and cultural phenomena specific to the Internet, such as Internet memes, which include popular catchphrases, images, viral videos, and jokes. When such fads and sensations occur online, they tend to grow rapidly and become more widespread because the instant communication facilitates word of mouth transmission. This list focuses on the internet phenomena which are accessible regardless of local internet regulations. Advertising and products * Amazon Coat – an unnamed coat sold on the Online shopping, online store Amazon.com by the Chinese clothing brand Orolay, previously known for its Furniture, home furnishings. It became a viral phenomenon from the period between December 2018 and the COVID-19 pandemic. * Beanie Babies – Cited as being the world's first Internet sensation in 1995. * Cerveza Cristal – A Chilean beer company that produced a series of advertisements during a Star Wars original trilogy, ''Star Wars'' original trilogy broa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
