你用线是否ＵＬ２９１９规格线，是参考ＵＬ标准要求，参考ＵＬ７５８可以了．
UNDERWRITERS LABORATORIES INC. APPLIANCE WIRING MATERIAL
Subject 758 Section 2 Page 2919 Issued: March 22, 1978
Revised: Feb. 12, 2001
Style 2919 Low Voltage Computer Cable.
Rating 80°C, 30 Volts.
Insulated Conductors ：No. 40 AWG minimum. Labeled or complying with Manufacturer’s AWM Procedure having a minimum rating of 80°C, 30 V.
Assembly ：Consists of two or more conductors, twisted pairs or groups of twisted conductors twisted together. The conductors or groups of conductors may be laid parallel forming a flat,oval or round cable. The lay of the conductors is not specified. A barrier layer and/or fillers are optional. Manufacturer shall maintain a complete description of each assembly. May use same or mixed AWG size.
Covering (Optional) - A 6 mil or heavier PVC covering may be extruded over the conductor assembly.
*Shield Optional.
Jacket PVC - Class 43
THICKNESS (MILS)
#Dia of cable under jacket Minimum Minimum
in inches Average at any point
_____________ ________ ____________
0.425 or less 30 24
0.426 - 0.700 45 36
0.701 - 1.000 60 48
1.000 - 1.500 80 64
1.501 - 2.500 110 88
2.501 and larger 140 112
# - Major dia if cable is flat or oval.
*Standard Appliance Wiring Material UL 758.
2919 VGA现在已被HDMI取代了，没有多少工厂在做此线了。