Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

The current-carrying capacity of a 0.75 mm² copper wire depends on several factors, including the operating environment, type of insulation, whether the wire is installed in conduit, and the number of wires. Here are some common scenarios and their corresponding current ratings:1. Household PVC-Insulated Copper WireAccording to general experience and standards, the safe current-carrying capacity of household PVC-insulated copper wire is as follows:Safe Current Rating: 6 A per square millimeter.S

Electrical wires and cables are conductive materials used for transmitting electrical energy or signals. They typically consist of a conductor, insulation layer, sheath, and other protective layers. Wires and cables are widely used in power systems, communication networks, building wiring, industrial equipment, and many other fields.Main ComponentsConductor:The conductor is the core part of the wire or cable, usually made of copper or aluminum, responsible for conducting current or signals. Copp

What is Cable Sealing in Electrical Systems?Cable sealing is a technique used to protect cable terminations and intermediate joints by preventing external environmental factors such as moisture, dust, and chemicals from entering the cable interior, thereby ensuring the long-term stable operation of the cable. These sealing measures can include the use of sealants, sealing sleeves, waterproof tapes, heat shrink tubing, and other materials and techniques to ensure the seal and insulation of the ca

Why Does the Neutral Wire Burn Out?The neutral wire (or neutral line) burning out is a common electrical issue that can be caused by various factors. Here are some of the main reasons why a neutral wire might burn out:1. Overload Excessive Current: If the load in the circuit exceeds the design capacity, the current on the neutral wire will be too high, causing significant heating and eventually leading to burnout. Short Circuit: A short circuit between the neutral wire and other conductors (such

Advantages and Disadvantages of Underground CablesUnderground cables are widely used in power transmission and distribution, but they come with both advantages and disadvantages. Here are the main pros and cons of underground cables:Advantages Aesthetic and Environmentally Friendly Reduced Visual Pollution: Underground cables do not clutter the landscape like overhead lines, maintaining a clean and aesthetically pleasing environment. Reduced Impact on Wildlife: Underground cables do not pose

What to Consider When Choosing CablesWhen selecting cables, several factors need to be considered to ensure that the chosen cables meet the specific application requirements and guarantee safety and reliability. Here are some of the main factors to consider:1. Current Capacity (Ampacity) Conductor Cross-Sectional Area: The cross-sectional area of the cable conductor determines its current-carrying capacity. A larger cross-sectional area can carry higher currents, but it also increases cost and w

The relationship between the tail protection of the cable and the automatic reclosing.The problem of reclosing in cable line protectionIn cable line protection, the application of automatic reclosing has certain limitations. Automatic reclosing is usually used for overhead line transmission and power supply lines as an effective accident prevention measure. However, for cable lines, due to their characteristics, the application of automatic reclosing is not common.The characteristics of cable li

Schematic diagram of power transmission process

Advantages of Aluminum Profiles in Power Transmission and Distribution1. Good conductivity Effective Power Transmission: Aluminum profiles have good conductivity. Although its conductivity is lower than copper, it can still meet the needs of power transmission and effectively transmit electrical energy. In power transmission lines, aluminum profiles can be used as conductor cores, such as aluminum core cables, to achieve power supply from the power generation end to the power consumption end, in

Solid wire and stranded wire are both commonly used types of conductors, each with their own advantages and disadvantages. When discussing resistance, we need to consider factors such as the total cross-sectional area, material, temperature, and the geometric shape of the conductor. Below is some basic information about the resistance characteristics of solid wire and stranded wire:Solid WireSolid wire is made from a single piece of metal conductor without any internal gaps or seams. This type o