国外电缆、电线的燃烧测试，分成各个级别；常见的网络线CAT5，CAT6，CAT7等也基本遵循以下的燃烧测试；

http://www.highflexcables.com/dian-yuan-xian-ping-bi-xian-zi-liao.html

BLP	BMR	BM	BLX
*Cable diameter must be less than 0.250″ **Cable diameter must be less than 0.375″
C(UL) Certifications; UL/NEC-Approved cables may also be C(UL)/CEC-Approved as communications cables meeting the requirements of the Bi-National Standard CSA C22.2 No. 214/UL 444 and Section 60 of the Canadian Electrical Code, Part I (CEC). The C(UL) cable designation (and its meaning) would be one of the following: 1. CMP — Cable meeting CSA FT6 or NFPA 262 (UL 910); 2. CMR — Cable meeting UL 1666, CSA FT4 3. CMG — Cable meeting CSA FT4 4. CM — Cable meeting UL 1685 (UL 1581, Sec. 1160) Vertical-Tray, CSA FT1 5. CMX — Cable meeting UL 1581, Sec. 1080 (VW-1), CSA FT1 6. CMH — Cable meeting CSA FT1.
FLAME TESTS
FT1		FT1 Vertical Flame Test — per C.S.A. C22.2 No. 0.3-92 Para 4.11.1 A finished cable shall not propagate a flame or continue to burn for more than one (1) minute after five (5) fifteen (15) second applications of the test flame. There is an interval of fifteen (15) seconds between flame applications. The flame test shall be performed in accordance with Para 4.11.1 of Canadian Standards Association (CSA) Standard C22.2 No. 0.3. In addition, if more than 25% of the indicator flag is burned, the test cable fails. FT1 Cables can be used in Combustible buildings.
FT4		FT4 Vertical Flame Test — Cables in Cable Trays per C.S.A. C22.2 No. 0.3-92 Para 4.11.4 The FT4 Vertical Flame Test — Cables in Cable Trays is similar to the UL-1685 Vertical Tray Flame Test, but is more severe. The FT4 test has its burner mounted at 20° from the horizontal with the burner ports facing up. The UL-1685 Vertical Tray has its burner at 0° from the horizontal. The FT4 samples must be larger than 13mm (.512″) in diameter. If not, then the cable samples are grouped in units of at least three (3) to obtain a grouped overall diameter of 13mm. The UL-1581 Vertical Tray does not distinguish on cable size. The FT4 has a maximum char height of 1.5 m (59″) measured from the lower edge of the burner face. The UL-1685 has a flame height allowable up to approximately 78″ measured from the burner. FT4 Cables can be used in Non-Combustible buildings.
FT6		FT6 Horizontal Flame & Smoke Test — per C.S.A. C22.2 No. 0.3-92 Appendix B Products passing the FT6 Horizontal Flame and Smoke Test are designated FT6 in the column where the trade number appears. This test is for cables which must pass a Horizontal Flame and Smoke Test in accordance with ANSI/NFPA Standard 262-1985 (UL-910). The maximum flame spread shall be 1.50 meters (4.92 ft.). The smoke density shall be 0.5 at peak optical density and 0.15 at maximum average optical density.
Combustible Construction Combustible Construction; means that type of construction that does not meet the requirement for noncombustible construction. Combustible means that a material fails to meet the acceptance criteria of CAN/ULC S114, (Standard Method of test for determination of non-combustibility in Building Materials) (ref: NBC Part 1 Section 1.1.3.2). Noncombustible Construction Non-Combustible Construction; means that type of construction in which a degree of fire safety is attained by the use of noncombustible materials for structural members and other building assemblies. Non-Combustible means that a material meets the acceptance criteria of CAN/ULC S114, (Standard Method of test for determination of non-combustibility in Building Materials) (ref: NBC Part 1.1.3.2).
Cable Substitution Hierarchy as per C22.2 #214 — Communication Cables The following cable substitution may be used: A. Communication cables marked MPP, CMP, MPR, CMR, MPG, CMG, MP, CM, CMX, CMH, FT6, and FT4 have been found to meet the standard criteria for FT1. B. Communication cables marked MPP, CMP, MPR, CMR, MPG, CMG, and FT6 have been found to meet the standard criteria for FT4. C. Communication cables marked MPP and CMP have been found to meet the standard criteria for FT6.