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Power Cords

Power cords are lengths of conductive materials which supply electrical energy from a main power source to a piece of electrical equipment, or an electrical appliance. Power cords are typically flexible, although for certain uses can be semi-rigid, and consist of a cord with electrical plugs at each end, one male, and one female. The female plug is connected to the piece of equipment or appliance while the male plug connects to the electrical receptacle or outlet.

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Kord King specializes in providing each of their customers with superior power cords. They make sure every product is able to meet the toughest deadlines and quality standards. As a manufacturer leader and offering the highest level of customer service, our flexibility is in tackling even the most difficult projects. Our products are U.L. and C.S.A. approved.
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Our customers find we have the highest standards when it comes to quality, and delivery. Quail Electronics is a worldwide power cord supplier, offering power cords and various other products. Our products are used worldwide across every industry there is. Offering same day shipping, competitive pricing, low $50 minimum and a large array of products in stock, contact Quail.
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A power cord manufacturer, with over two million monthly productions of power cords, is Signal and Power Delivery Systems. They provide in-house wire extrusion and connector production assures the best price, quality and unmatched lead times. They offer OEM custom designs and over 200 styles of stocked products, for ANY country with unbeatable prices.
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United Universal Industries is a leading supplier and manufacturer of various power cords, wiring harnesses and special molded products for a wide range of industries and markets. All products are 100% compliant. Family owned and operated, United Universal Industry has been providing their loyal customers with personal service and quality products for over thirty years.
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All of our power cords are tested and stand up to rigorous demands of everyday application. We serve a global market including the United Kingdom, Ireland, Germany, Switzerland, Austria and of course the United States. We offer a variety of power cords for your choosing convenience. There is no minimum order quantity that you have to follow when you do business with us, and all of our products are made in our Iowa factory in the United States. Call today for more info!
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We manufacture power cords which are useful for a number of applications including: medical devices, computers, business machines, appliances, power tools, communication equipment and more. These products are supported by a variety of value-added services and our highly trained is ready to assist your needs today! If you would like more information please give one of our representatives a call today!
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Industry Information

Power Cord Features

When it comes to power cords, there are several features that may come with the cords or that could be added to your cord order. Some of these may include twist-locking abilities, which work to minimize the possibility disconnection. For cords that are used in sensitive applications, or for audio/video equipment, a shield over power conductors will prevent electromagnetic interference. Other accessories include leakage current detectors, pilot lamps that indicate present voltage, and fuses that offer overcurrent protection.

Retaining clamps are another common feature that are offered in conjunction with power cords. These are mechanical devices that protects an appliance coupler from being accidently pulled free. Retaining clamps, also referred to as safety lock devices, are common in situations where safety precautions are strict such as medical devices, computing applications, and stage and lighting technology. Clamps are also often used when extension cords are employed, where the current must carried quite far from the source as they ensure a secure connection no matter how the extension cord is maneuvered.

Another common feature for power cords are plug adapters. These are crucial accessories when it comes to using appliances in countries other than those that they were created to be operated in. These, in combination with voltage converters, will ensure you're your electronic devices are protected from the harm that could come from varying voltages in other countries. Some companies may offer more features and accessories than others, so shop around and make sure that you're getting everything you need to operate your electronic equipment safely, efficiently, and economically.

Power Cords

Also referred to as electric cords, power cords can be used to transfer direct electrical current (DC) or alternating electrical current (AC). Most cords are AC power cords that conduct energy in which the direction of current flow is periodically reversed. The power supply cord, or cable assembly, is comprised of a wire composed of highly conductive material such as copper, surrounded by an insulative material and then sealed in a protective outer jacket, with a plug cover to ensure safety around the electrical outlet. In North America, NEMA power cords (National Electrical Manufacturers Association) are the standard for electrical plugs, cord voltage capabilities and receptacle configuration. International power cords and plug adapters are used in conjunction with electrical appliances in countries different from those in which they were designed to operate. Cord sets are used in any application which requires the existence of electrical energy to operate, such as office space, industrial operations, medical machinery, commercial appliances etc. For specialty equipment such as construction machinery, sound and lighting equipment, emergency medical defibrillators and electrical power tools, used in locations without a convenient power source, extension cords are used to carry the electrical current up to hundreds of feet away from an outlet.

When determining the appropriate power cord type to be used for different applications, there are many factors to be considered such as equipment location, duration of use, strain of the operation etc. Power cord manufacturers adhere to standard regulations for voltage ratings, current, wire diameter and length, jacket material, maximum cable temperature, as well as the type of molded plug and female receptacle to be used. The capability of a cord to successfully handle the required flow of electrical energy will depend on these factors, and the quality of electricity transmitted will be affected accordingly. Cord wire sizes and voltage capacities are designated according to the American Wire Gauge (AWG) standards. The appropriate wire size is therefore determined by the amount of voltage required to flow through the cord. Wire shape can be either flat or round according to whichever is more appropriate for the application. Jacket material is another consideration and may be determined by the intended use and location of the power cord. For example, if the cord is purposed for rugged, outdoor usage, a jacket material will be waterproof and more durable than a cord intended only for use indoors, for instance with a laptop computer. Another consideration for jackets is the possible existence of electromagnetic interference and whether or not the wires in a power cord require further protection, such as those used with medical equipment.

One end of the power cord holds an electrical plug known as male, which connects to the main power supply through an electrical outlet. The two most commonly used plugs in North America are: Type A plugs and Type B plugs. Type A plugs have two conducting prongs, and Type B plugs have a third prong which, in addition to supplying electrical current flow, connects the power cord to a grounding rod. The prongs on the electrical plug fit into the corresponding holes in the wall socket, or electrical receptacle, thus providing a connection to allow the flow of electrical energy from the power source, through the extension cord and to the appliance. The optimum flow of energy through the power cord depends on a tight fit between the socket and the plug. Electricity flows through the connection and the conducting material in the power cord to the electrical equipment.

The National Electrical Manufacturers Association (NEMA) is responsible for setting the stringent standards used in North America for electrical supply components, and this ensures a high quality of electrical supply is maintained. Other countries have their own voltage systems and electrical component layouts, and so those respective countries determine the standards and controls implemented in their power cords. Manufacturing standards such as those enforced by NEMA help to maintain consistency in power cord production, and decrease the chance of malfunctions due to quality standards. As with any component used in the transferring of electrical power, there are important safety precautions to be undertaken in the use of power cords. Personal injury, death and/or extensive property damage can occur as the result of deterioration, malfunction or misuse of electrical equipment, and it is important for there to be measures in place to reduce these risks. Polarization, or grounding, is an important aspect of electrical plugs and appliances, especially for higher voltage appliances or for electrical equipment that has a higher risk of causing electric shock when live. Sensitive electrical equipment and products should only be used with polarized or grounded cord sets. Other safety precautions for electrical supply components include plug covers, waterproof protective materials, fuses and circuit breakers.
Power Cords
Power Supply Cord
Cable Assembly


  • AC power cords conduct alternating current from one point to another. AC power cords consist of a conducting medium, typically copper, surrounded by insulation and a jacket.
  • Business machine cords are used for computers and related electronic equipment.
  • Cable assemblies consist of several wires or cables collected into a single unit with connectors on at least one end.
  • Cord covers are protective covers that guard loose cords and wires from hazardous situations.
  • Cord sets are power cords with a male electrical plug at one end and a female plug at the other.
  • Electric cords are conductive cables used to transfer AC power from a plug to an electrical device.
  • Electrical plugs male electrical connectors with metal-blade contact prongs that connect electrically with holes in the matching female electrical receptacle.
  • Electrical receptacles are commonly known as outlets or sockets.
  • Extension cords are marked with necessary information pertaining to their use, size and wattage rating. Extension cords are available in many lengths and are marked with a size, or gauge, which is based on the American Wire Gauge (AWG) system.
  • Heavy duty cords are specially designed for rough, heavy-usage environments in industrial or commercial applications. The head is constructed with large flats having deeply contoured ridges that afford a non-slip grip, and a heavy molded strain relief shroud protects the cord/plug union.
  • Hospital plugs are designed to meet the critical needs of medical equipment applications. Heavy-duty solid brass blades and pins are soldered or welded to the conductors for added durability.
  • International power cords are detachable means of supplying electricity from a foreign power source to native electrical equipment or appliances that would otherwise have been incompatible.
  • NEMA power cords re the standard for North American electrical plugs, cord voltage capacities and electrical receptacles' configuration
  • Polarized plugs have one blade that is wider than the other, which helps reduce the potential for shock. Three-prong plugs are automatically polarized, since they can be inserted only one way.
  • Power supply cords  are flexible lengths of cord that have an attachment plug molded to their ends and are used to transmit electrical energy from the main supply to an electrical device. A power supply cord, which could also have terminations or a molded strain relief on the opposite end of the plug, is permanently installed in the device being powered, as opposed to a cord set, which is detachable.
  • Plug adapters are electrical devices that allow for sockets to connect to plugs that are otherwise incompatible to each other.
  • Plug covers provide protection against hazards such as electrical shock that result from uncovered electrical outlets.
  • Right angle power cord sets allow users to plug in electrical equipment close to walls without bending or damaging power cords and are available in both a two-conductor (polarized or non-polarized) or three-conductor configuration. The three-conductor plug could have the grounding pin in the top or bottom location.
  • Three-conductor plugs have two vertical blades and a grounding pin. They are polarized by default, since they can be plugged in just one way.
  • Two-conductor plugs consist of two vertical blades, one if which is neutral and the other is referred to as hot. Two-conductor plugs, which have no grounding pin, are polarized or non-polarized.




Power Cord Terms

Abrasion Resistance - The ability of a power cable or material to resist surface wear.
 
Alternating Current (AC) - A current flow whose direction changes in regular cycles.
 
American Wire Gauge (AWG) - The North American standardized wire and cable-sizing system for identifying wire diameter of copper conductors. The higher the gauge number, the smaller the cable.
 
Ampacity - Also known as "current carrying capacity," it is the capability of handling electric current, as expressed in amperes.
 
Arc Resistance - The time it takes for an arc to create a conductive path in a material.
 
Attenuation - Expressed in decibels (db) per unit length, it is the loss of power in an electrical system.
 
Boot - A protective layer covering any part of a conductor or cable, as well as its insulation or jacket.
 
Braid - A covering of one or more wires made from fibrous or metallic filaments that are interwoven in cylindrical form.
 
Breakdown Voltage - The amount of voltage at which the insulation between two conductors or a conductor and ground deteriorates.
 
Bunch Stranding - The twisting of wires together within the same frequency, in order to achieve a specific gauge.
 
Cold Flow - Irreversible damage of the insulation due to the mechanical force of pressure.
 
Conductivity - A term describing the capability of any material to carry an electrical charge, typically expressed in terms of the percentage of conductivity of copper, which has 100% conductivity.
 
Conductor - Any material in which electrons can freely move from atom to atom (i.e. electrical current flow). Conductors, which are usually metal, could be a wire that is solid or a stranded multi-wire cable.
 
Conduit - A tube or trough through which wires and cables are run.
 
Continuity Check - A test used to determine if an electrical current will flow continuously throughout the length of a wire or cable.
 
Cord - A small insulated flexible cable made to withstand mechanical abuse.
 
Dielectric - An insulating material used in a cable to shield one conductor from another.
 
Direct Current (DC) - Electric current that flows in one direction only.
 
Electrical Circuit - The complete path of an electrical current. An electrical circuit is considered to be an open circuit when the continuity is broken and a closed circuit when continuity is maintained.
 
Europlug - An international plug used by many European countries. Europlug is the common name for the CEE 7/16 2.5 amp, Class II plug.
 
Farad - A unit of electrical capacity.
 
Fatigue Resistance - Resistance to the crystallization of metal, eventually leading to the breakage of conductors and wires due to flexing.
 
Flanged Inlets/Outlets - A flanged nylon housing that permits mounting in a panel on the front of the equipment for an electrical inlet or outlet, which is held in place by screws and bolts.
 
Frequency - The number of times an alternating current repeats its cycle in one second, measured in Hertz (Hz). The standard international frequency is 50Hz, while the standard North American frequency is 60Hz.
 
Gauge - An indication of the physical size of a wire or the wire diameter specifications. The number of the gauge is in an inverse relationship to the size of the wire (i.e. the larger the wire, the smaller the gauge number).
 
Ground - A complete circuit accomplished through a conductive connection between an electrical circuit and the earth or another large conducting body.
 
Hi-pot - A test applied to a cable to determine whether any damage has occurred during shipment.
 
High Voltage - Generally considered to be any operating voltage over 600 volts.
 
IEC 60320 - Formerly "IEC 320," it is the International Electrotechnical Commission standard that applies to a series of connectors, plugs, outlets and inlets designed for use on electrical or electronic equipment, including such portable equipment as computers, printers and medical equipment.
 
Insulated Wire
- A conductor of electricity covered by a non-conducting material.
 
Insulation - Any material having high resistance to the flow of electric current that protects the inner conductors of an electrical cord.
 
Jacket - Material, usually extruded plastic or elastomer, that covers wire and cable, providing protection and additional insulation.
 
Line Cord - A cord that ends with a plug at one end and is utilized for connecting equipment to a power outlet.
 
Loss - The dissipation of energy without accomplishing useful work.
 
Molded Plug - A connector molded on one or both ends of a cable or cord.
 
Multiconductor - A cord or cable complex containing more than one conductor.
 
National Electric Code (NEC) - A compilation of wiring practices and requirements from the National Fire Protection Association (NFPA).
 
Neoprene
- Also called "polychloroprene," it is a synthetic rubber that has good resistance to chemical, oil and flame.
 
Nylon - An abrasion resistant thermoplastic with effective chemical resistance that is utilized for cable and wire jacketings, wiring devices, connectors and plugs.
 
Ohm - A unit of measurement referring to electrical resistance.
 
Outlet - A female connection that supplies access to electricity from a source of power.
 
Pin and Sleeve - A receptacle, connector or plug that has round pins or sleeve-type contacts.
 
Plug
- Also called an "attachment plug," it is the cable mount portion of an electrical connection or male contact device that has pins or blades protruding from the face.
 
Sheath - Often referred to as a jacket, it is the material that is applied to the outermost part of a wire or cable. Sheaths are typically made of extruded plastic or elastomer.
 
Shield - In cables, a metallic layer that prevents electrostatic or electromagnetic interference between wires and external fields when placed around a conductor or group of conductors.
 
Signal - An information conveying current, including digital, analog, audio and video information.
 
Single Phase - An electrical circuit that has a neutral, a line and a ground.
 
Socket - A device that establishes an electrical connection with plugs through tension connections. Sockets could be metal contacts that are either bent to receive the blade or pin or spring-loaded.
 
Surge - Also called a "transient," it is the temporary and relatively large increase in the voltage in an electric circuit or cable.
 
Three-phase - An electrical circuit that holds three lines and a ground or three lines, a neutral and a ground. The three lines are 1201/4 out of phase with each other.
 
Voltage Rating - The maximum voltage that can be continuously applied to a wire in conformance to standards or specifications.
 
VW-1 - Formerly designated as "FR-1," it is a rating established by UL for wire and cables that pass a specifically designed vertical flame test for flammability.
 
W - Any cord that is designated by Underwriters Laboratories, Inc. (UL) for outdoor use.
 
Watt - A unit of measurement that refers to electric power.
 
Wire Gauge - Any standard system of numerical designations for wire sizes (e.g. the AWG).




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