GB/T 18380.34-2008 Combustion tests on electric and optical cables under flame conditions - Part 34: Test for vertical flame spread of bundled wires and cables installed vertically, Class B (English Version)
2022GB/T 18380.34-2022 Tests on electric and optical fibre cables under fire conditions—Part 34:Test for vertical flame spread of vertically-mounted bunched wires or cables—Category B
2008GB/T 18380.34-2008 Combustion tests on electric and optical cables under flame conditions - Part 34: Test for vertical flame spread of bundled wires and cables installed vertically, Class B