Tag: alternating current

Alternating Current

How an Electrical Cable is made

Electrical cables are the backbone of a powered society. They carry electrical currents, allowing us to connect to power in all aspects of our lives. From industrial machinery and manufacturing equipment to medical equipment and everyday devices and appliances, these cables ensure that electricity moves safely and efficiently where needed.

But how are electrical cables made? Keep reading to learn more!

What Is an Electrical Cable?

Electrical cables are designed to carry an electrical current from one element to another. They consist of conductors, which are insulated wires suitable for carrying electrical current. Electrical conductors are made from metals such as copper and aluminum. Most wires are made from copper because it conducts electricity with high flexibility and very little resistance.

Electrical wires come in solid-core, stranded, or braided configurations to form a single assembly. The ends connect to two devices, allowing electrical signals to transfer between them. Electrical cables are assemblies of multiple conductors bundled together to transmit electrical power and signals.

How Electrical Cables Are Made: The Process

Step 1

The first stage in the manufacturing process of a conductor is the wire-drawing. Wire-drawing involves gradually reducing the wire’s diameter to its final size. After the diameter is reduced, the wire is drawn further to achieve the required size for each conductor type.

Step 2

In the second stage of this process, the wires undergo a heat treatment called annealing. Annealing is a process of heating metal and slowly cooling it to remove internal stresses and toughen the metal. The purpose of this treatment is to increase the wire’s conductivity.

Step 3

The next step is to add insulation. Because the current runs along the outside of the copper wires, there must be insulation between the inner conductor and the outer conductor. Insulation is the layer of synthetic materials that is applied over conductors for electrical isolation between other wires, conductive surfaces, or from the ground. An inner conductor insulation also prevents any current leakage.

Step 4

Some cables may require additional elements to improve protection. For instance, electrical coverings called “screens” insulate the signals that circulate in the cable, shielding the power cables from external interference.

Step 5

Once the cable’s inner insulation is applied, it requires an outer insulation, called the jacket. The jacket is applied over the insulation for mechanical, environmental, chemical, and electrical protection.

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The Difference Between AC and DC Power

There are two types of current flow in a circuit: Alternating Current (AC) and Direct Current (DC). Understanding the difference in circuitry and application use of AC and DC power is essential when selecting electrical components. There are significant differences between, say, AC inlets and DC inlets, or AC power cords and DC power cords. Consumers interact with power cords and electronic devices daily in a plug-and-play manner; however, OEMs must also consider how current affects the performance and operation of their equipment and account for various factors during the design process.

Here, we examine the differences between AC and DC power, how these currents affect industrial systems, and how to select the appropriate current for different applications.

AC vs DC: What’s the Difference?

AC stands for Alternating Current. AC power relies on a rotating magnet that causes electrons to switch direction repeatedly. The amount of energy carried through AC is economical to transfer over longer distances and provides more power. Most industrial equipment connects to power using AC inlets and AC power cords.

DC stands for Direct Current. With DC, a steady magnetism along the wire ensures that current can only flow in one direction. This provides a stable power supply for electronic equipment. DC power cords are often used to connect low-voltage circuits and systems that require clean, consistent power.

Transmission of AC and DC Power

AC power is the dominant form of electrical transmission because it can be safely used at both high and low voltages, as well as for long-distance transport. It minimizes line loss and supports large power distribution networks. Until more recent years, with the proliferation of data centers, AC power had been the predominant power architecture.

DC transmission requires more complex and costly conversion equipment, typically making AC transmission more popular. However, modern high-voltage DC systems (HVDC) reduce power losses over long distances, making DC transmission particularly relevant for data centers and industrial operations.

Why Many Industrial Systems Use DC Power Internally

Most industrial equipment is powered with an AC inlet. However, many systems convert the incoming AC to DC immediately after power entry. DC is often preferred for these operations because its unidirectional flow provides a stable, consistent voltage required for downstream electronics. Converting AC to DC power for internal use prevents damage to sensitive equipment from AC power fluctuations and improves efficiency.

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Why You Shouldn’t Buy Male to Male Cords

I’ve read several stories on why people choose to purchase and/or make these male to male power cords, but for some reason, they’re referred to as “suicide cables.”

male to male 1Why? See, power cords have two ends: the male and the female end. The male end is the plug and the female end is the receptacle. When you plug the male end into a wall outlet, the female end or connector is ready to be plugged into a device or equipment, which will allow the electricity to flow through. That is a safe connection. BUT, if you plug the male end into an outlet and have a male plug on the other end, this leaves an exposed conductor (which is the biggest NO-NO).

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