Technical Knowledge Center
Building Wire Selection Guide: Standards, Sizes and Applications
A practical building wire selection guide for distributors, contractors and project buyers sourcing cable from China.
Updated October 2, 2026 · Prepared by GlobalFortuneCables technical sourcing team · For project specification and compliance decisions, confirm the applicable local code and model-specific documents with the project engineer, certification body or inspection authority.
Start with the project code and market
Identify the destination-country code and the required wire type before comparing suppliers. National approval and marking requirements may differ between markets.
Match size and installation method
Conductor size, insulation temperature, installation route and ambient conditions affect the suitable wire construction. Ask the engineer or inspector to confirm the final specification.
Use documentation to control substitution
Request a datasheet, model marking, test report and packaging sample. This helps distributors and contractors compare equivalent products instead of comparing names only.
Frequently Asked Questions
What should a building wire RFQ include?
Include standard, conductor material, size, insulation, color, voltage, quantity, packaging, destination market and required documents.
What is the MOQ for building wire?
MOQ depends on the actual cable model and specification, including color, size, packaging and whether the item is in stock.