In high-risk electrical work, insulating gloves are the last line of defense against fatal shocks. However, selecting the wrong voltage class for your working environment can turn this critical PPE into a hidden danger. This guide decodes global standards and practical scenarios to help you make informed decisions.
1. Voltage Classes Under ASTM, IEC & GB Standards
High-voltage insulating gloves are categorized by three major certifications:
- ASTM D120 (USA): Class 00 (500V) to Class 4 (36kV)
- IEC 60903 (International): Class 0 (1kV) to Class 4 (36kV)
- GB 17622-2008 (China): Level 1 (3kV) to Level 4 (36kV)
| Working Voltage | ASTM Class | IEC Class | GB Class | Typical Applications |
|---|---|---|---|---|
| ≤500V | Class 00 | – | – | Low-voltage panel maintenance |
| ≤1kV | Class 0 | Class 0 | Level 1 | Residential circuit repair |
| ≤3kV | Class 1 | Class 1 | Level 2 | Substation commissioning |
| ≤17kV | Class 2 | Class 2 | Level 3 | High-voltage cable installation |
| ≤26.5kV | Class 3 | Class 3 | Level 4 | Live-line transmission work |
| ≤36kV | Class 4 | Class 4 | Level 4 | EHV equipment maintenance |
2. Scenario-Based Selection: Low-Voltage vs High-Voltage
Scenario 1: Low-Voltage Systems (≤1kV)
- Risks: Frequent contact but lower energy exposure.
- Recommended Class: Class 00/0 (ASTM) or GB Level 1.
- Gonow Safety Solution:
Natural rubber gloves (0.5mm thickness) for agility, ideal for meter installations or household repairs.
Scenario 2: High-Voltage Operations (≥3kV)
- Risks: Arc flash hazards demand multi-layer protection.
- Recommended Class: Class 2+ (ASTM) with leather protectors.
- Gonowsafety Solution:
Composite rubber gloves (2-3mm thickness), tested to 36kV, paired with puncture-resistant sleeves for substations or wind farm maintenance.
3. Certification Pitfalls & Procurement Tips
- Dual Certification for Global Projects:
- For EU/US markets: Choose gloves meeting both ASTM and IEC standards.
- For Chinese grids: GB compliance + CMA/CNAS test reports.
- Beware of “Thickness Scams”:
Cheap gloves may use excessive rubber to fake higher classes. Gonow safety products are third-party certified. - Mandatory Re-Testing:
Even Class 4 gloves degrade. Schedule annual dielectric tests. Gonow Safety offers free lab re-certification for bulk buyers.
Conclusion
The right gloves depend on standards alignment and real-world application. gonowsafety’s full-range insulating gloves comply with ASTM/IEC/GB, with customizable options (oil-resistant, cold-weather variants) to empower global electricians with visible safety.
