Difference between wire and cable
Wire and cable refers to materials used for power, communication and related transmission purposes. There is no strict boundary between "wire" and "cable. Generally, products with a small number of cores, a small product diameter, and a simple structure are called wires, those without insulation are called bare wires, and others are called cables; conductors with larger cross-sectional areas (greater than 6 mm²) are called large wires, and smaller ones (Less than or equal to 6 mm²) is called small wires, and insulated wires are also called cloth wires.
Wire and cable material
Wire and cable mainly includes bare wire, electromagnetic wire and insulated wire for motor and electrical appliances, power cable, communication cable and optical cable. wire and cable named:
The complete name of the wire and cable is usually more complicated, so people sometimes use a simple name (usually the name of a category) combined with the model specification to replace the complete name, such as "low-voltage cable" on behalf of 0.6/1kV class of all plastic insulated power cables. The type spectrum of wire and cable is relatively perfect. It can be said that as long as the standard model specification of wire and cable is written, the specific product can be clearly defined, but what is its complete name?
The naming of wire and cable products has the following principles:
1. Contents included in the product name
(1) Product application or size category name
(2) Material or type of product structure;
(3) Important or additional features of the product
Nomenclature is basically in the above order, sometimes in order to emphasize important or additional features, features are written before or before the corresponding structural description.
2. Sequence of structure description
The product structure is described according to the principle from inside to outside: conductor --> insulation --> inner sheath --> outer sheath --> armored type.
3. Simplify
Without causing confusion, some structural descriptions are written or abbreviated, such as aluminum conductors are not allowed in automobile wires and flexible wires, so the conductor material is not described.
Examples:
Rated voltage 8.7/15kV flame retardant copper conductor XLPE insulated steel tape armored PVC sheathed power cable
"Rated voltage 8.7/15kV"-use/voltage class
"Flame Retardant"-Characteristics of Emphasis
"Copper core"-conductor material
"Cross-linked polyethylene insulation"-insulation materials
"Steel tape armour"-armour material and type (double steel tape gap wrapping)
"PVC sheath"-inner and outer sheath materials (the inner and outer sheath materials are the same, save the inner sheath materials)
"Power cable"-the name of the product category.
Wire and cable professional knowledge
Power cable product name
The corresponding model is written as ZR-YJV22-8.7/15, and the model is written in the following instructions. Model: The model composition and sequence of wires and cables are as follows: [1: category, purpose][2: conductor][3: insulation][4: inner sheath][5: structural features][6: outer sheath or derivative]-[7: use features] items 1-5 and 7 are represented by pinyin letters, and polymer materials are represented by the first letter of English name, each item can be 1-2 letters; item 6 is 1-3 numbers. The principle of omission in the model: copper is the main conductor material used in wire and cable products, so the copper core code T is saved, except for bare wires and bare conductor products. Bare wire and bare conductor products, power cables, electromagnetic wire products do not indicate the general category code, electrical equipment with wire and cable and communication cables are not listed, but listed small category or series code. Item 7 is marked with pinyin letters after "-" for various special use occasions or additional special use requirements. Sometimes this item is written up to the front in order to highlight it. Such as ZR-(flame retardant), NH-(fire resistance), WDZ-(low smoke halogen, enterprise standard),-TH (hot and humid areas), FY-(termite, enterprise standard), etc. The number marks the outer cover layer or outer sheath of the armor layer.