What are electrical wires?
When you hear the word "wire" or "cable," you probably think of electricity. And when it comes to electric wiring, these terms are used interchangeably. But there are some key differences between the two.
A wire is one electrical conductor and a cable is multiple conductors encased in the sheathing.
Electric wires are typically made of aluminum or copper. They're either bare or insulated and can be covered in a thin layer of PVC that's colored to indicate whether the wire is a neutral, ground, or hot wire in your electrical installation. We discuss wire colors later on in this guide.
Cables contain at least one neutral wire, ground wire, and hot wire twisted or bonded together—the number of wires depends on its purpose. The wires are then insulated and encased in their own color-coded layer of PVC before being wrapped in an outer sheath to make up the single cable.
How to Identify Wires and Cables？
Wires and cables are one of the most important parts of your home's electrical system. They allow you to connect light fixtures, outlets, and appliances to your home power source (whether it's a generator or the grid).
But how do you know which wires are right for your project? It's easy! 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.
Naming and Taxonomy
The NEC provides a system with letters to quickly identify what a wire's capabilities are. Some common lettering for wire includes 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 are the letters and attributes you'll see regularly in residential wiring:
- T: Thermoplastic insulation - H: Heat resistance - HH: High heat resistance (up to 194 degrees Fahrenheit) - W: Suitable for wet locations - N: Nylon coating
Electrical Wire Color Coding
Hey there, DIY-ers!
We know you're all about that DIY life, and we want to help you make sure you know what you're doing (and how to do it safely!) when you start your next project.
When it comes to wiring, color coding is important. It's important not only because it helps identify the purpose of each wire, but also because it helps prevent accidents that could result in fire or electrocution.
Here's what you need to know:
Black = Hotwire for switches/outlets
Red = Hotwire for switch legs and connecting to hardwired smoke detectors
Blue & Yellow = Hot wires pulled through conduit; blue is often used for three- or four-way switch applications, and yellow is for switch legs to control fans, lights, etc.
White = Neutral (can be hot if marked with black or red to indicate it's no longer a neutral)
Green & Bare Copper = Only for grounding purposes
what is the red wire in electrical？
Have you ever wondered what the red wire in your home's electrical system is for? You're not alone. Here's the scoop on what red wires are, and how to use them safely.
Red wires are usually used as secondary hot wires. These wires carry a current when a device is switched on, but they do not carry a current when the device is switched off. This means that you can always tell whether or not there's power running through a red wire by testing it with a tester—if there's power flowing through the wire, it'll light up.
Red wires are also hot and should be marked to avoid the dangers of electrocution. Red wires are commonly used when installing ceiling fans, where the light switch may be hidden above or behind them.
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？
Sell your electrical wire and copper wire, and get top dollar for your unneeded equipment.
Whether you want to make room in your warehouse or get back on track with your budgeting, selling your electrical surplus can be a big help. With International Recovery, we’re ready to buy electrical wire and copper wire from you. We offer top dollar for your surplus so that you can 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.
Are you ready to sell your electrical wire and copper wire surplus? If you want to make top dollar for your new, used, obsolete electrical wire and copper wire surplus, call us at (0086) 0755 8527 1922 for an easy and reliable solution!