What is an electric wire?
Electrical wires are the conductors that carry electricity from the source to your home. They're either bare or insulated, and they're usually covered in a thin layer of PVC. If they have a PVC sheath, then the PVC is colored to indicate whether the wire is a neutral, ground, or hot wire in your electrical installation. We discuss wire colors in its own section in this guide.
Cables contain at least a neutral wire, ground wire, and hot wire that are twisted or bonded together. Depending on its purpose, the cable may contain more wires. The wires in a cable are insulated in their own color-coded layer of PVC. The group of wires is then encased in an outer sheath to make up the single cable.
How to Identify Wires and Cables？
There are a few different ways to identify your wires and cables. The most common way is to look for the letters printed on the jacket of the wire or cable.
Each jacket will have information printed on it to help you choose the correct product for your job. A letter code provides the attributes of the wire, along with material, gauge, and voltage rating.
A common system used by the National Electrical Code is THHN, XHHW, THW, etc…
THHN is the most commonly used type of wire in conduit and cable trays for services, feeders, and branch circuits in commercial or industrial applications. Below is some common lettering for residential wiring:
T: Thermoplastic insulation
H: Heat resistance
HH: High heat resistance (up to 194 degrees Fahrenheit)
W: Suitable for wet locations
Electrical Wire Color Coding
Electrical wire color coding is a system that uses color to indicate the purpose of each wire. The colors help identify the wires, which is important in an industry that relies on standardization.
The purpose of the electrical wire color coding is to make it easier for electricians, as well as advanced DIYers, to identify which wires are hot and which are neutral. This helps prevent any potential accidents from occurring when working with electricity.
The most common colors used in electrical wire color coding include black for hot wires, red for hot wires that connect to switches or outlets, and blue and yellow for hot wires pulled through a conduit (blue is often used for three- or four-way switch applications and yellow is for switch legs that control fans and lights), white for neutral (can be hot if marked with black or red to indicate it's no longer a neutral), green and bare copper only for grounding purposes."
what is the red wire in electrical？
Red wires are hot, and it’s important to keep them clear of any other colored wires. If you have a red wire in your electrical system, it’s probably a secondary hot wire that is being used for other purposes.
For example, if you have a light fixture that is controlled by two switches (one to turn the light on and off and another to dim the light), then you’ll need two separate circuits for those switches which means two separate red wires.
You might also see a red wire if you have ceiling fans that are wired with three-way switches. A common mistake is to connect two fan circuits together by connecting one red wire from each circuit together. This will cause power problems because there will be too much current flowing through both fan circuits when they are turned on at the same time.
Choosing the right wire size is very important. It affects the safety of your electrical system, so you want to make sure you get it right.
In most cases, wire size is determined by two things: the current-carrying capacity of the wire (how much amperage it can handle) and what it will be used for.
When choosing a wire size, you'll need to know its AWG number, which is based on its diameter in thousandths of an inch (see table below). For example, if you're installing a new circuit for a home theater system, you'll want to choose a larger gauge wire that can handle higher amperages than if you were installing lights in your garage.
where to buy electrical wire？
Selling your electrical wire and copper wire surplus is a smart idea, and International Recovery wants to help you do it. Call us at (0086) 0755 8527 1922 for an easy and reliable solution.
Instead of letting old, broken, or out-of-date electrical wire and copper wire accumulate dust, we make it a simple process to sell your wire surplus and turn it into cash that you can then apply to other areas of your business.
The decision to sell electrical wire and copper wire surplus can be a big help if you’re looking for some extra cash, and International Recovery is always ready to pay cash on the spot before we even leave your site. By selling the old, broken or out-of-date electrical wire and copper Wire you no longer need, you’ll have funds to use for new projects or internal initiatives at your company.