In RVV-sheathed power lines, national standard and non-standard versions are distinguished based on whether they comply with international standards. Whether power lines comply with international standards primarily depends on the conductor material, conductor size, and specifications. Non-standard power lines are often commercially available to reduce costs.
What is RVV cable?
RVV is also a type of cable, commonly known as sheathed cable. RVV cable stands for copper-core PVC-insulated PVC-sheathed flexible cable, also known as lightweight PVC-sheathed flexible cable, commonly known as soft sheathed cable. It is primarily used for power supply, control, and signal transmission lines for electrical appliances, instruments, electronic equipment, and automation devices. Specifically, it can be used in burglar alarm systems and building intercom systems.
The Difference Between National Standard and Non-standard RVV-sheathed Power Lines
The conductor materials used in national standard and non-standard power lines vary significantly.
National standard power lines are all made of oxygen-free copper. Non-standard power lines use oxygen-free copper, solid copper, and copper-clad aluminum.
Oxygen-free copper (Oxygen-free copper) is an excellent conductor material for cables, offering low resistance, stable transmission, and high oxidation resistance. All copper is bronze, also known as secondary recycled copper. It is a type of copper but contains high impurities, resulting in high resistance but high oxidation resistance. Copper-clad aluminum (Copper-clad aluminum) has low oxidation resistance and cannot be used for long-term projects. Oxygen-free copper power cables are best for projects.
Common specifications for RVV-sheathed power cables are 0.5/0.75/1.0/1.5 mm, etc. The copper core of national standard power cables is sufficient, with variations of no more than approximately 0.01 mm.
Non-standard power cables typically have a copper core content of 7-80%. Oxygen-free copper is generally used in projects, while full copper and copper-clad aluminum are generally used for general and short-distance projects. Therefore, Oxygen-free copper power cables are recommended.
The formula for calculating the actual square footage of copper core in a power cable is: Actual Square Footage = (Single Copper Wire Size/2) Square Feet * 3.14 * Number of Copper Wires.
The standard length of power cables is 100 meters, but 100m and 500m lengths are also available. A meter that meets national standards for power lines is sufficient. Generally, a meter for oxygen-free copper non-standard power lines is sufficient. Meters for all-copper and copper-clad aluminum lines generally do not exceed 200 meters. You can also use a meter to determine the actual length. (The above data is for reference only; actual values are subject to change.)
Measurement method: Take a marked power line and use the first letter at the beginning and the second letter at the end as a reference, such as m.
The above content discusses the differences between national standards and non-standard power lines in RVV armored power lines. Electrical wires are also categorized as national standard and non-national standard. However, it is important to note that non-standard wire refers to cables and wires for specific purposes that do not meet the specifications and performance requirements of national standards. However, they must also meet general safety and quality requirements. National standard wire is manufactured in full compliance with national standards. Common household and general electrical wires are generally of standard specifications and performance, so when choosing wire, always identify national standard wire.
