A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by current in excess of that which the equipment can safely carry (overcurrent). Its basic function is to interrupt current flow to protect equipment and to prevent fire. Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset to resume normal operation.
The UL enterprise is a global private safety company headquartered in Northbrook, Illinois, composed of three organizations, UL Research Institutes, UL Standards & Engagement and UL Solutions.
A surge protector (or spike suppressor, surge suppressor, surge diverter, surge protection device or transient voltage surge suppressor is an appliance or device intended to protect electrical devices in alternating current circuits from voltage spikes with very short duration measured in microseconds, which can arise from a variety of causes including lightning strikes in the vicinity.
A residual-current device (RCD), residual-current circuit breaker (RCCB) or ground fault circuit interrupter (GFCI) is an electrical safety device that interrupts an electrical circuit when the current passing through a conductor is not equal and opposite in both directions, therefore indicating leakage current to ground or current flowing to another powered conductor. The device's purpose is to reduce the severity of injury caused by an electric shock. This type of circuit interrupter cannot protect a person who touches both circuit conductors at the same time, since it then cannot distinguish normal current from that passing through a person.
The National Electrical Code (NEC), or NFPA 70, is a regionally adoptable standard for the safe installation of electrical wiring and equipment in the United States. It is part of the National Fire Code series published by the National Fire Protection Association (NFPA), a private trade association. Despite the use of the term "national," it is not a federal law. It is typically adopted by states and municipalities in an effort to standardize their enforcement of safe electrical practices. In some cases, the NEC is amended, altered and may even be rejected in lieu of regional regulations as voted on by local governing bodies.
A distribution board is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit breaker for each circuit in a common enclosure. Normally, a main switch, and in recent boards, one or more residual-current devices (RCDs) or residual current breakers with overcurrent protection (RCBOs) are also incorporated.
An arc-fault circuit interrupter (AFCI) or arc-fault detection device (AFDD) is a circuit breaker that breaks the circuit when it detects the electric arcs that are a signature of loose connections in home wiring. Loose connections, which can develop over time, can sometimes become hot enough to ignite house fires. An AFCI selectively distinguishes between a harmless arc, and a potentially dangerous arc.
The United States Consumer Product Safety Commission is an independent agency of the United States government. The CPSC seeks to promote the safety of consumer products by addressing "unreasonable risks" of injury ; developing uniform safety standards ; and conducting research into product-related illness and injury. In part due to its small size, the CPSC attempts to coordinate with outside parties—including companies and consumer advocates—to leverage resources and expertise to achieve outcomes that advance consumer safety. The agency was created in 1972 through the Consumer Product Safety Act. The agency reports to Congress and the President; it is not part of any other department or agency in the federal government. The CPSC has five commissioners, who are nominated by the president and confirmed by the Senate for staggered seven-year terms. Historically, the commission was often run by three commissioners or fewer. Since 2009, however, the agency has generally been led by five commissioners, one of whom serves as chairman. The commissioners set policy for the CPSC. The CPSC is headquartered in Bethesda, Maryland.
A hot tub is a large tub full of water used for hydrotherapy, relaxation or pleasure. Some have powerful jets for massage purposes. Hot tubs are sometimes also known as "spas" or by the trade name Jacuzzi. Hot tubs may be located outdoors or indoors.
A rare-earth magnet is a strong permanent magnet made from alloys of rare-earth elements. Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets. The magnetic field typically produced by rare-earth magnets can exceed 1.2 teslas, whereas ferrite or ceramic magnets typically exhibit fields of 0.5 to 1 tesla.
Aluminum building wiring is a type of electrical wiring for residential construction or houses that uses aluminum electrical conductors. Aluminum provides a better conductivity-to-weight ratio than copper, and therefore is also used for wiring power grids, including overhead power transmission lines and local power distribution lines, as well as for power wiring of some airplanes. Utility companies have used aluminum wire for electrical transmission in power grids since around the late 1800s to the early 1900s. It has cost and weight advantages over copper wires. Aluminum in power transmission and distribution applications is still the preferred wire material today.
The Consumer Safety Act (CPSA) was enacted on October 27, 1972, by the United States Congress. The act should not be confused with an earlier Senate Joint Resolution 33 of November 20, 1967, which merely established a temporary National Commission on Product Safety (NCPS), and for only 90-days. Section 4 of the 1972 act established the United States Consumer Product Safety Commission (CPSC) as a permanent independent agency of the United States federal government and defined its basic authority. The act gives CPSC the power to develop safety standards and pursue recalls for products that present unreasonable or substantial risks of injury or death to consumers. It also allows CPSC to ban a product if there is no feasible alternative to an outright ban. CPSC has jurisdiction over more than 15,000 different consumer products. The CPSA excludes from jurisdiction those products that expressly lie in another federal agency's jurisdiction, for example food, drugs, cosmetics, medical devices, tobacco products, firearms and ammunition, motor vehicles, pesticides, aircraft, and boats. These products may fall under the purview of agencies such as the U.S. Food and Drug Administration, the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives, the U.S. Department of Agriculture, the U.S. Department of Transportation, the U.S. Environment Protection Agency, and the U.S. Federal Aviation Administration.
A power entry module (PEM) is an electromechanical component used in electrical appliances, integrating the appliance inlet with other components such as:
The Electrical Safety Foundation (ESFI), formerly the Electrical Safety Foundation International, is a 501(c)(3) non-profit organization based in Rosslyn, Virginia, US dedicated exclusively to promoting electrical safety at home, school, and in the workplace. Founded in 1994 as a cooperative effort by the National Electrical Manufacturers Association (NEMA), Underwriters Laboratories (UL), and the US Consumer Product Safety Commission (CPSC), ESFI is funded by charitable contributions from, distributors, Nationally Recognized Testing Laboratories, retailers, insurers, utilities, safety organizations, and trade and labor associations. The mission of the Electrical Safety Foundation (ESFI) is to prevent electrically-related injuries, deaths and fires; saving lives and property through public education and outreach.
The Consumer Product Safety Improvement Act (CPSIA) of 2008 is a United States law signed on August 14, 2008 by President George W. Bush. The legislative bill was known as HR 4040, sponsored by Congressman Bobby Rush (D-Ill.). On December 19, 2007, the U.S. House approved the bill 407-0. On March 6, 2008, the U.S. Senate approved the bill 79-13. The law—public law 110-314—increases the budget of the Consumer Product Safety Commission (CPSC), imposes new testing and documentation requirements, and sets new acceptable levels of several substances. It imposes new requirements on manufacturers of apparel, shoes, personal care products, accessories and jewelry, home furnishings, bedding, toys, electronics and video games, books, school supplies, educational materials and science kits. The Act also increases fines and specifies jail time for some violations.
A pre-lit tree is an artificial Christmas tree which is pre-wired with Christmas lights. The lights are wrapped around the tree before it is sold, reducing set up time and making storage simpler. The lights cannot usually be removed from the tree because they are normally embedded within the artificial branches. The product may be sold as a kit - the user assembles the tree and plugs it into an electrical outlet - or the dealer may assemble it before the sale. Larger trees usually contain traditional strands of bulb lights or LEDs, while smaller tabletop trees may have fiber-optic branches. Pre-lit trees are categorised under the headings of electrical goods.
A generator interlock kit is a device designed to allow safe powering of a home by a portable generator during a power outage. It is a less-expensive alternative to purchasing and installing a dedicated transfer switch. The kit achieves the same function by adding an external interlock onto an existing breaker panel that allows the main breaker to be turned on or one designated load breaker to be turned on, but not both at the same time. The interlocked load breaker is repurposed as the "backfeed" breaker, and a generator is connected to it.
A self-balancing scooter is a self-balancing personal transporter consisting of two motorized wheels connected to a pair of articulated pads on which the rider places their feet. The rider controls the speed by leaning forward or backward, and direction of travel by twisting the pads.
True DC is a type of switch disconnect (isolator) used in solar photovoltaic installations, in accordance with EN 60364–7–712. Created by UK based IMO Precision Controls Ltd, and later adopted by other manufacturers such as Senton and ABB. The isolator design ensures a very fast break/make action by incorporating a user independent switching action. As the handle is moved, it interacts with a spring mechanism causing the contacts to "snap" over upon reaching a set point. This mechanism means that the disconnection of the load circuits and the suppression of the electrical arc, produced by a constant DC load, is normally extinguished in a maximum of 5 MS using the specific pole suppression chambers incorporated into the design.
Federal Pacific Electric was an electrical products manufacturer based in Newark, New Jersey, US. It was one of the "big 5" electrical equipment manufacturers in the United States in the mid-20th century.
