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1、导线线径与电流规格导线的阻抗与其长度成正比与线径成反比，请在使用电源时，需特别注意输入与输出导线的线径问题，以防止因电流太大引起过热，而造成意外，下列表格为导线在不同温度下的线径与电流规格表。线径（大约值）铜线温度60oC75oC85oC60oC电流（A）22.5 mm2020252524mm252530306mm23035404028mm4050555514mm25565707522mm27085959530mm28510011011038mm29511512513050mm211013014515060mm212515016517070mm214517519019580mm21652002
2、15225100mm 2195230250260AWG標準線徑規格對照表AWG NumberO InchO mmO mm2Resistance Ohm/m4/0 = 00000.46011.71070.0001613/0 = 0000.41010.485.00.0002032/0 = 000.3659.2667.40.0002561/0 = 00.3258.2553.50.00032310.2897.3542.40.00040720.2586.5433.60.00051330.2295.8326.70.00064740.2045.1921.10.00081550.1824.6216.80.00
3、10360.1624.1113.30.0013070.1443.6610.50.0016380.1283.268.360.0020690.1142.916.630.00260AWG NumberO InchO mmO mm2Resistance Ohm/m100.1022.595.260.00328110.09072.304.170.00413120.08082.053.310.00521130.07201.832.620.00657140.06411.632.080.00829150.05711.451.650.0104160.05081.291.310.0132170.04531.151.
4、040.0166180.04031.020.8230.0210190.03590.9120.6530.0264AWG NumberO InchO mmO mm2Resistance Ohm/m200.03200.8120.5180.0333210.02850.7230.4100.0420220.02530.6440.3260.0530230.02260.5730.2580.0668240.02010.5110.2050.0842250.01790.4550.1620.106260.01590.4050.1290.134270.01420.3610.1020.169280.01260.3210.
5、08100.213290.01130.2860.06420.268AWG NumberO InchO mmO mm2Resistance Ohm/m300.01000.2550.05090.339310.008930.2270.04040.427320.007950.2020.03200.538330.007080.1800.02540.679340.006310.1600.02010.856350.005620.1430.01601.08360.005000.1270.01271.36370.004450.1130.01001.72380.003970.1010.007972.16390.0
6、03530.08970.006322.73400.003140.07990.005013.44業界線徑的粗細是以號數(xxAWG)來表示的，數目越小表示線徑愈粗，所能承載的電流就越大,反之則線徑越細，耐電流量越小。例如說：12號的耐電流量是20安培，最大承受功率是2200瓦，而18號線的耐電流量則是7安培，最大承受功率是770瓦為什麼AWG號數越小直徑反而越大？如這麼解釋你就會明白，固定的截面積下能塞相同的AWG線的數 如11#AWG 號數可塞11根而15#AWG 號數可塞15根，自然的15#AWG 的單位線徑就較小美規線徑值單一導體或群導體【各正值或負值】的線徑值(Gauge)是以圓或平方厘
7、米(mm 2)量測而得，平方厘米不常用在量測線徑值，由於牽涉到不正確，因一般大部份的導體形體，包含長方形及其他怪異形狀。因此我們拿全部的量測以圓平方厘米(c/m)為參考值群導體計算的方法或公式:加上單一導體的線徑值總和，並比較上表求得。如果值落入兩者之間,取比較少的值。40股群導體線的線徑值為，如每一芯為24 Guage40 x 405c/m=16，200 c/m = 9 AWG(得出值落入12960c/m 和16440c/m 之間)快速求得線徑值的方法:丙條(AWG)相加時，該單一線徑值減3.ex.三條(AWG)相加時，該單一線徑值減5.ex.四條(AWG)相加時，該單一線徑值減6.ex.1
8、8 AWG =(18-3=)15 AWG24 AWG =(24-5=)19 AWG10 AWG =(10-6=)04 AWG2x3x4x只採用此方式為大原則。請記得快速求得線徑值的方法” 一些案例也許邊際會不正確,AWG(American Wire Gauge)是美制电线标准的简称，AWG值是导线厚度(以英寸计)的函数CrossSectionaream m2AWGTskdenko specification ConstructionNo. /mm Acturem m2Fine-wire Conductors VDE 0295 BS 6360 Class 5 Column 3Extra-fine
9、 wire strands VDE 0295Class 6Column4Column 5Column 6Column 70.043020x0.050.0470.08287x0.1270.0887x0.140.1060.1020x0.080.1010.14267x0.160.1418x0.1018x0.1036x0.0772x0.050.187x0.180.1787x0.200.220.202440x0.080.200.2514x0.1532x0.1032x0.1065x0.07128x0.0512x0.180.3050.3060x0.080.3010.342217x0.160.34219x0.
10、1542x0.1042x0.1088x0.07174x0.050.3812x0.2021x0.1548x0.10100x0.07194x0.0520x0.180.5090.520100x0.080.50216x0.2028x0.1564x0.10131x0.07256x0.0530x0.180.7630.7150x0.080.75424x0.2042x0.1596x0.10195x0.07384x0.0534x0.180.8650.81842x0.160.8441.032x0.2056x0.15128x0.10260x0.07512x0.051.251650x0.181.271.530x0.2
11、584x0.15192x0.10392x0.07768x0.052.01437x0.261.962.550x0.25140x0.15320x0.10651x0.071280x0.053.51266x0.263.50456x0.30224x0.15512x0.101040x0.07210x0.185.345.510105x0.265.57684x0.30192x0.20768x0.101560x0.0750x0.457.9588154x0.268.171080x0.40320x0.201280x0.102600x0.0788x0.4514.0146259x0.2613.75卜6128x0.40512x0.202048x0.107x1.9621.12224280x0.3222.5125200x0.40800x0.203200x0.10導線安全電流最大載流量：(CurrentCarrying Capacity)定義為在導體或絕緣體融化之前，所能負載之電流。由電流流過導體所產生之熱，將決定這條電線能負荷多 少電流
