Cable knowledge base

Cable knowledge

Selection, standards, certification—in plain English. Skip the common pitfalls and buy right.

WDZ Cable & GB/T 19666 Explained: China's Low-Smoke Halogen-Free Grades vs IEC 60754, IEC 61034 and EN 50575

What WDZ, WDZA, WDZB and WDZC actually mean under China's GB/T 19666 — and how they map (or fail to map) to IEC 60754 halogen tests, IEC 61034 smoke tests and EU CPR Euroclasses under EN 50575.

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Chinese Building Wire Codes (BV, BVR, BVV, BVVB, RV) vs IEC 60227 and UL 83: A Buyer's Translation Guide

What BV, BVR, BVV, BVVB and RV actually mean, how they map to IEC 60227 designations (60227 IEC 01/02/10/52/53), and why none of them substitutes for UL 83 THHN/THWN in North America.

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BV vs BVR Household Wiring: How to Choose Solid‑core or Flexible Wire

There is no absolute preference for either type in household wiring. Choose BV for fixed wiring and BVR for heavily‑bent conduit runs. Proper termination workmanship is the key to safety.

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