BLV cable insulation is primarily made of polyvinyl chloride (PVC), and its core is an aluminum conductor. It is a rigid-conductor cable without a protective sheath. BLVV cable insulation is also primarily made of polyvinyl chloride, and it is a round, sheathed cable with an aluminum conductor. Common wire colors for BLV and BLVV cables include red, yellow, green, blue, black, and yellow-green (ground wire).
The letters represent:
b represents cloth wire; l represents aluminum conductor; v represents polyvinyl chloride.
Operating Characteristics of BLV and BLVV Cables:
Rated Voltage: 450/750V;
Operating Temperature: The long-term operating temperature should not exceed 70°C;
Bending Radius: No less than 4D for wires with an outer diameter (D) less than 25 mm; no less than 6D for wires with an outer diameter (D) of 25 mm or greater.
Differences between BLV and BLVV cables:
1. BLV aluminum-core PVC insulated cable—aluminum core wire, no protective sheath;
BLVV aluminum-core PVC insulated cable—aluminum core wire, with a protective sheath;
2. BLVV cable has three voltage ratings: some for 300/300V, others for 450/750V, and one for 350/300V;
3. BLVV cable, because it uses a double-layer insulation layer and a protective sheath, not only improves insulation performance but also ensures normal operation in harsh environments, extending its service life.
Because both BLV and BLVV cables are made of aluminum conductors, and because they are low-priced, lightweight, and have excellent conductivity and oxidation resistance, they are gradually replacing copper-core cables in more applications. For example, they are suitable for power plants, household appliances, lighting, instrumentation, and telecommunications equipment with AC voltages of 450/750V and below.
