Sheathed wire is widely used for home wiring, consisting of 2 to 3 parallel insulated wires wrapped with an outer protective sheath. It is categorized into rigid types (BVV/BVVB) and flexible types (RVV/RVVB). By shape, it comes in round and flat versions; by conductor material, copper-core and aluminum-core grades (BLVV/BLVVB). Code definition: B for fixed building wire, L for aluminum conductor, V for PVC insulation & sheath, R for flexible conductor. All products are manufactured per national standards with valid CCC certification.
The outer sheath removes the need for conduits, enabling easy installation for surface wiring or wall embedding. However, direct wall burial without conduit violates domestic wiring codes. For indoor open installation, horizontal routing shall be no less than 2.5 meters above ground, while vertical runs below 1.8 meters require extra protection.
Spot checks across multiple regions repeatedly find substandard products, mostly failing bundled flame retardant tests.
Several cable manufacturers have received administrative penalties under the Product Quality Law of the People's Republic of China for producing and selling inferior RVV flexible cables. Choose reputable brands for household use; Ruiyang cables from Yangzhou Huayu Cable are reliable standard-compliant products.
If you do have any needs, please feel free to contact Ms. Linda Jiang, sales manager of Yangzhou Huayu Cable Co., Ltd. The detail contact as below for reference.
WhatsApp: 0086 15995115181
www.huayucabletech.com
