Date | 2026-09-21 13:11:40
Smart meter boxes sit outdoors in sun and rain for years. Once the enclosure material falls short, the box warps and metering drifts at best — and at worst there is leakage or fire. Wenzhou Jintong Complete Sets Electric Co., Ltd. was established in 2001 and is located at No. 1 Yangzhai Road, Lingang Economic Development Zone, Yueqing Bay Port Area, Yueqing City, Zhejiang Province. The company took part in the revision of national standard GB/T 23641-2018, and its BMC materials hold a UL Yellow Card (file no. E504820), providing reliable material for meter box enclosures. When choosing a meter box enclosure, check these three specifications first:
l Specification 1: UL94 V-0 flame retardancy — flame retardant even at 0.4 mm wall thickness (the material self-extinguishes and does not drip). The first line of defence for electrical safety.
l Specification 2: CTI ≥600 V tracking resistance — condensation and dust are common inside a meter box, and surface tracking is a short-circuit hazard. The higher the CTI, the safer.
l Specification 3: Weather resistance and dimensional stability — outdoor temperature swings are wide and humidity is high. The enclosure must not warp or crack, and must hold assembly accuracy over the long term.
BMC (bulk molding compound) is a thermoset material: a single molding cycle satisfies flame retardancy, insulation, weather resistance and structural strength at the same time. Compared with ordinary thermoplastics, BMC does not melt, creeps very little and stays dimensionally stable over time, so it deforms and ages less outdoors. Wenzhou Jintong's BMC materials offer dielectric strength ≥20 kV/mm, PTI ≥600 V and arc resistance ≥180 s (per company standard Q/JTJ0001-2025), balancing insulation safety with long-term reliability.
More importantly, material–mold–molding integration: material is formulated in-house, molds are designed in-house, and molding is done in-house. This avoids the warping, porosity and misalignment common in meter box enclosures, and delivers good batch consistency.
l Qualified: participation in national standard revision, UL certification or third-party test reports — more credible than a verbal promise.
l Full capability: integrated material, mold and molding, so any problem can be traced back to its source.
l Customizable: dimensions, colour and flame-retardant rating can be tailored to different meter types.
l Proven record: supply experience in grid and power equipment industries is more reassuring than "it should work".
A: The BMC 16 series (such as 1616 and 1620) is commonly used — UL94 V-0 at 0.4 mm and CTI ≥600 V, suitable for outdoor meter boxes. The exact grade is matched to the enclosure and its protection rating.
A: Yes. As a thermoset material, BMC resists heat and humidity and ages slowly at ambient conditions; after double-85 ageing (85 ℃ / 85 % RH), performance is well retained.
A: Yes. We support customization to drawings and offer a range of colours (grey and white are common for outdoor use).
A: BMC has good weather resistance; the design life of an outdoor meter box enclosure can reach 20 years or more, depending on the environment and service conditions.
A: Yes. Our BMC materials hold a UL Yellow Card (file no. E504820); flame retardancy and tracking resistance are UL-recognized.
📧 wendy.qiu@smcbmc.com 📞 +86-13868305300
