Wiktor Wise
A corded electric device is one that is wired into an outlet box, rather than simply plugged in. Power cords are a type of power cable designed to connect devices to power sources, usually with a plug at one end. Power cables are used more broadly for power transmission and distribution and may include various types of cables used in different contexts. Cords have different types of exterior jackets available to accommodate environmental variables such as moisture, temperature, oils, sunlight, flexibility, and heavy wear.
| Characteristics | Values |
|---|---|
| Definition | Having an electrical cord |
| Electrical cord | A piece of wire covered in plastic |
| Cord set | One end attached to a molded electrical plug, the other end has a molded electrical receptacle |
| Cord set accessories | Fuses, pilot lamp, leakage current detector |
| Cord types | IEC 60320 power cables (normal and high-temperature variants), North American lamp cords |
| Cord connectors | Male and female connectors |
| Cord jackets | Moisture, temperature, oils, sunlight, flexibility, heavy wear |
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What You'll Learn
Corded electric means hardwired installation
When an appliance is described as "corded-electric", it means that it is hardwired. Hardwired appliances are those that are spliced directly into a junction box, connecting them permanently to the electrical wiring of a building. This is in contrast to plug-in appliances, which are connected to wall sockets by their power cords.
Hardwired appliances are more challenging to install, requiring a skilled electrician. They are more expensive to set up than plug-in appliances, which can simply be plugged into a wall socket by the owner. However, hardwired appliances are usually neater in appearance, as they are professionally installed. They run on a dedicated circuit, and larger appliances are more likely to be hardwired.
Examples of hardwired appliances include built-in wall ovens, drop-in ranges, warming drawers, vent hoods, and disposers. Some 240V electric cooking appliances, such as freestanding and slide-in ranges, are also hardwired but do not have a conduit. All built-in appliances have electrical leads attached, which can be connected to the household wiring.
It is important to ensure that your home's electrical infrastructure can support any new appliances. Regular electrical inspections can help determine if any upgrades are needed to safely accommodate hardwired or plug-in devices.
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Power cords are used to connect devices to power sources
Power cords are an essential component of modern electrical systems, allowing us to safely and conveniently power our electronic devices. They are used to connect devices to power sources, facilitating the transmission of electricity. Power cords are typically made of copper or aluminium wires, which are encased in an insulating material like rubber or plastic to prevent electrical leakage. This insulating material is then covered by a non-conductive protective layer for added safety and durability.
At each end of the power cord are connectors, such as plugs and sockets, which allow for secure connections to both the power source and the device. One end of the power cord typically has a male plug that connects to an electrical outlet, wall socket, or extension cord, while the other end has a female connector designed to attach to the appliance. In some cases, the female connector may be absent, and the cord is directly attached to the appliance. Power cord couplers, or connectors, play a crucial role in ensuring the safe and efficient operation of electrical devices by serving as the interface between the power source and the device.
Power cords are commonly used in residential and commercial environments to power a variety of devices, including televisions, computers, refrigerators, and air conditioning units. They are also used with electrical power tools, lighting fixtures, household appliances, musical instruments, and personal devices like laptops and smartphones. When travelling internationally, it is important to note that different countries have their own standards for plugs and power supplies, so voltage converters and detachable power cords may be necessary to protect electronic devices.
Power cord splitters, also known as dividers, are used to supply electricity to two appliances or electrical circuits by splitting the electrical signal. While this reduces the signal strength, it allows for the efficient use of a single power source to power multiple devices. Power cords are also available in different current and voltage ratings to accommodate different applications and ensure compatibility with local electrical standards.
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Power cables are used for power transmission and distribution
Power cables can be installed as permanent wiring within buildings, buried underground, or run overhead. Underground cables offer several advantages, including a lower risk of damage from storms, reduced maintenance, fewer faults, smaller voltage drops, and a better appearance. Voltage drop, which depends on the conductor material and size, is an important factor in power cable design. Copper, for instance, is a better conductor than aluminium and experiences a lower voltage drop for a given length and wire size.
Power cables are also used in power transmission towers, which support different kinds of cables. These towers carry conductor bundles, with each bundle corresponding to one phase of the alternating current generated by power stations. Conductors are stranded, meaning they consist of several wires twisted together, making them more flexible and exposed to air, which helps to cool the conductor and increase its conductivity.
In the context of "corded-electric", power cables can be used to supply electricity to various fixtures and appliances, such as lighting or ceiling fans. These corded-electric devices are typically hardwired into an outlet box and may require a specific voltage, such as 120 volts.
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Corded electric devices may be wired into an outlet box
Corded electric devices are those that are wired into an outlet box. This is sometimes referred to as a hard-wired installation. This can be done by following a few simple steps, but it is important to be aware of the risks involved in working with electricity.
Firstly, you need to determine where you will get the power for your new outlet. This will involve looking at the wall behind the desired location and checking if the circuit can handle another outlet. If you are unsure, it is best to contact a licensed electrician or your local code authority for advice. Once you have located the correct circuit, turn off the power to the outlet at the breaker panel. You can then use a voltage tester to check if the power is indeed off.
The next step is to remove the faceplate and pull out the old outlet. You can then attach the wires to the new outlet, following the correct colour-coded screw terminals. For example, the white wire should be attached to the silver screw and the black wire to the brass screw. It is important to ensure that all connections are tight and secure. Once this is done, the new outlet can be pushed into the box and secured with screws. The faceplate can then be attached, and the power turned back on.
It is worth noting that there are specific rules and regulations regarding receptacle loads and placement, which vary depending on your location. For example, some rooms, such as kitchens and bathrooms, may have specific circuit requirements. Therefore, it is important to check with your local code authority or electrical inspector to ensure your installation is safe and compliant.
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Power cords may have a shield to minimise electromagnetic interference
In simple terms, a "corded electric" refers to a hardwired installation. This means that the fixture is wired directly into an outlet box, rather than simply plugged into a socket. For example, a "corded-electric" lighting fixture would be wired into an outlet box and then covered with a concealing box cover.
Now, when it comes to power cords and electromagnetic interference, it's important to understand the concept of shielding. Shielding is an electrical practice commonly used in power cords to minimise electromagnetic interference (EMI). This is achieved by adding an extra layer of protection around the power cord conductors, also known as the cable's insulation. The purpose of this layer is to protect the cable from EMI, which can cause disruptions in the performance and operation of electrical equipment.
EMI, or electromagnetic interference, refers to the fluctuations in the amount of current and voltage that flows through an electric circuit. These fluctuations create electrical noise, which can be conducted or radiated as EMI. While some level of electrical noise is present in almost all electronic systems, certain environments and types of equipment are associated with high electrical noise. For example, industrial plants, particularly heavy processing factories, and data centres tend to generate more electrical noise. Specific appliances, such as heavy motors, generators, transformers, and relay controls, also contribute significantly to electrical noise.
To combat the negative effects of EMI, power cords may incorporate shielding. This involves using conductive or magnetic materials to create a barrier around the power cord conductors. By doing so, the electromagnetic field in the surrounding area is reduced or redirected, minimising the impact of EMI on the cable and the equipment it is connected to. The type of shielding used can vary, including braid (a woven mesh of metal wires), aluminium foil, or a drain wire, depending on the specific needs and "noise" level of the application.
In certain industries, such as data centres and industrial applications, the use of shielded power cords is particularly important. Shielded power cords offer improved performance, minimised downtime, and reliable protection against EMI. By investing in high-quality power cords with the appropriate shielding, businesses can ensure the optimal performance of their equipment and minimise the disruptive effects of electromagnetic interference.
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Frequently asked questions
'Corded electric' means that an appliance is connected to a power source through a power cord.
A power cord is a piece of wire, often covered in plastic, that connects an appliance to a power source. One end of the power cord is attached to a moulded electrical plug, while the other end is connected to the appliance.
A power cord is a type of power cable that is specifically designed to connect devices to power sources, typically with a plug at one end. Power cables, on the other hand, refer to cables used for power transmission and distribution and may include various types of cables used in different contexts.
'Corded electric' appliances may be wired into an outlet box with a cover that conceals the box. They may also be plugged into a socket, depending on the specific appliance and its power requirements.
