線纜的AWG與mm對(duì)照表

與mm對(duì)照：(依為1/3的系)1為一般也寫成式:0.322/10.127/7.成

AWG(AmericanWireGauge)是美制電線標(biāo)準(zhǔn)的簡(jiǎn)稱，值是導(dǎo)線厚度（以英寸計(jì)）的函數(shù)。換算后的常用AWG和線徑值，如下：#AWG號(hào)數(shù)mm直徑厘米圓平方厘米(c/m)83.2641644092.90612960102.58810380112.3058234122.0536530141.6284110151.4503257161.2912580171.1502048181.0241620190.91161288210.7229810220.6438645230.5733509.4240.5106405330.179850.13群導(dǎo)體計(jì)算的方法或公式：加上單一導(dǎo)體的線徑值總和，并比較上表求得。如果值落入兩者之間，取比較少的值。40股群導(dǎo)體線的線徑值為，如每一芯為Guage=40x405c/m=16，200c/m=9AWG(得出值落入12960c/m和16440c/m間)快速求得線徑值的方法：兩條(AWG)相加時(shí)，該單一線徑值減ex.2x18AWG=(18-3=)15AWG三條(AWG)相加時(shí)，該單一線徑值減ex.3x24AWG=(24-5=)19AWG四條(AWG)相加時(shí)，該單一線徑值減ex.4x10AWG=(10-6=)04AWG請(qǐng)記得“快速求得線徑值的方法”一些案例也許邊際會(huì)不正確，只采用此方式為大原則有很多用戶對(duì)美國熱電偶的線規(guī)是很楚，下提供線規(guī)對(duì)表，

AWG規(guī)

熱偶絲徑mm

AWG規(guī)

熱偶絲徑mm0123456789101112131415161718192021

8.257.356.545.835.194.624.113.673.262.912.592.302.051.831.631.451.291.151.020.9120.8130.724

23242526272829303132333435363738394041424344

0.5740.5110.4550.4040.3610.3200.2870.2540.2260.2030.1800.1600.1420.1270.1140.1020.0890.0790.0710.0641.0560.051

220.643AWG線規(guī)與制英單對(duì)AWG（AmericanWireGauge），被稱作布/夏普線規(guī)Brown/Sharpegauge），在美國從1857年開始就被作為一種標(biāo)準(zhǔn)的線規(guī)使用，它廣泛應(yīng)用于圓柱體，立方體，有色金屬及電力控制線的直徑量，它的截面積決定了導(dǎo)體的載流能力。

注：1、kcmil（千圓密耳）：國外電截面積的一種表達(dá)方式，其與mmkcmil＝0.507mm2、Ω/kFT：一千英尺的歐姆3、由表中歸納出的與英寸關(guān)系如下：AWG=Alog-B其中，＝-19.93156857，B＝9.73724

的換算公式為：AWG(AmericanWireGauge)其是美制電線標(biāo)準(zhǔn)的簡(jiǎn)稱AWG值導(dǎo)線厚度（以英寸計(jì)）的函數(shù)。外徑

外徑AWG

公制mm

英制inch

截面積電阻值(mm2)(W/km)

AWG

公制mm

英制inch

截面積電阻值(mm2)(W/km)4/0

11.68

0.46107.220.17

22

0.643

0.02530.324754.33/02/01/01234

10.409.278.257.356.545.835.19

0.409685.010.364867.430.324953.490.289342.410.257633.620.229426.670.204321.15

0.210.260.330.420.530.660.84

23242526272829

0.5740.5110.440.4040.3610.320.287

0.02260.258848.50.02010.204789.40.01790.162479.60.01590.12811430.01420.10211280.01260.08042270.01130.0647289

567891011121314151617

4.624.113.673.262.912.592.302.051.821.631.451.291.15

0.181916.770.162013.300.144310.550.12858.370.11446.630.10195.260.09074.170.08083.3320.07202.6270.06412.0750.05711.6460.05081.3180.04531.026

1.061.331.682.112.673.364.245.316.698.4510.613.516.3

30313233343536373839404142

0.2540.2260.20420.1270.1140.1020.0890.0790.0710.064

0.01000.05073610.00890.04013210.00800.03165830.00710.02559440.00630.02019560.00560.01691,2000.00500.01271,5300.00450.00981,3770.00400.00812,4000.00350.00622,1000.00310.00494,0800.00280.00403,6850.00250.00326,30018192021

1.020.9120.8130.724

0.04030.810721.40.03590.566726.90.03200.518933.90.02850.411642.7

43444546

0.0560.0510.0460.041

0.00220.00255,5440.00200.002010,2000.00180.00169,1800.00160.001316,300其中，4/0表示0000，3/0表示000，2/0表示00，1/0表示0。例如常用的電話線直徑為26AWG，約0.4mm美制英制規(guī)與制換表美、英制線規(guī)與公制的換算與公制的換算表，是為了方便把美、英制線規(guī)與公制的導(dǎo)線對(duì)照。如美制的號(hào)線，它的直徑是毫，截面積是平毫米。也就是說，一條直徑毫的導(dǎo)線，在美國叫做46號(hào)，在英國叫做48號(hào)線。公的研究資料，是說明在不同頻率范圍內(nèi)，用什么號(hào)碼的導(dǎo)線制成的多股線效果最好。例如對(duì)于的頻帶，經(jīng)過深入的研究，証實(shí)在股數(shù)相同的情況下，用的李茲線由多股46的細(xì)線組成時(shí)，效果最好。具體一點(diǎn)說有兩條同樣是股李茲線第條用條的線組成條條38的導(dǎo)線組成。雖然第二條線粗得多，它的總表面積比第一條線大很多，但是用在不同頻帶的時(shí)候，效果不一：用在-頻帶的電路里時(shí)，第一條線的效果比第二條的效果更好。用在-頻的電路里時(shí)，第條線的效果比第一條線的效果更好。這是實(shí)驗(yàn)的結(jié)果原因是很復(fù)雜不同頻率的電流在通過同一種多股導(dǎo)線的時(shí)候，產(chǎn)生的電磁不同當(dāng)會(huì)影響到各種電磁參數(shù)而有不同的結(jié)果。以上資料是生產(chǎn)李茲線的公司實(shí)驗(yàn)的結(jié)果，在理論上怎樣解釋這種現(xiàn)象，我還沒有找到答案。有趣的是：李茲線的集膚效應(yīng)并非單純與導(dǎo)線的總表面積有關(guān)，而是與組成李茲線的股線粗細(xì)、通過的電流的頻率也有關(guān)系。從第4所舉的例子看：兩條同樣是660股的李茲線，一條用條46的導(dǎo)線組成；第二條用660條AWG的導(dǎo)線組成。第二條線粗得多，它的總表面積比第一條線大很多，但是這兩條線對(duì)不同頻率的電流效果不一樣。提供這些資料只是覺得有趣46的李茲線是很難買得到的，我們也不要走火入魔。除非有意深入研究，否則在可能的條件下，以自己能夠得到的李茲線試驗(yàn)就好了。

美制（）INCHMMMM11.684107.219.266.82527.3486.5435.8275.1894.6214.1153.6653.2642.9062.5882.3042.0521.8291.5281.4501.2911.1501.0240.91190.4110.28700.11430.01000.006180.004860.07110.093970.003170.002450.002030.001640.001290.00109

導(dǎo)線號(hào)碼（NUMBER）7/06/05/04/03/02/01/0

英制（S.W.GINCHMMMM12.7000125.6811.785010.970094.5110.160081.0770.1261.3653.1945.6038.6032.1827.2722.7718.6815.7012.9710.518.302.94636.825.484.293.242.632.081.591.170.6570.5190.71120.2920.2450.2030.1640.1360.1110.09370.07790.29460.06620.05910.05070.04290.03580.02930.02340.01820.01370.01170.11180.009810.008110.006570.005190.07110.003970.002920.002030.00129

0.0279

0.02240.01980.01780.01580.01400.0129

WWW.MWSWIRE.COM音響發(fā)燒友對(duì)喇叭線的選擇大有講究曾經(jīng)聽說過不乏有人花一萬多元買一條線的喇叭線的另外一個(gè)極端是隨便找一條電線連上，出聲就行。讓我們離開這兩個(gè)極端，從技術(shù)的角度看喇叭線的選擇。過細(xì)的導(dǎo)線顯然不會(huì)有好結(jié)果，因?yàn)榧?xì)線的電阻大，更多的功率將消耗在導(dǎo)線的電阻上低音的損失尤其嚴(yán)重過粗的導(dǎo)線雖然電阻小但是造成材料和金錢的浪費(fèi)通常認(rèn)為導(dǎo)線上的損（插入損耗）在0.5dB以下是可以容忍的。從功放輸出到音箱的這部分電路中，喇叭的阻抗，導(dǎo)線的長度，導(dǎo)線的粗細(xì)都很重要，一般的做法是根據(jù)導(dǎo)線長度和喇叭阻抗來推算出導(dǎo)線的粗細(xì)。下面的數(shù)字顯100尺（30米）導(dǎo)線的線徑、揚(yáng)聲器阻抗和插入損耗之間的關(guān)系。例30米18號(hào)線，4歐姆阻抗揚(yáng)聲器，插入損耗2.5dB夠大的了。大家知道3dB損失就意味著功放的輸出損失一半！10AWG:4Ohm=.44dB,12AWG:4Ohm=.69dB,8OhmdB,14AWG:4Ohm=1.07dB,16AWG:48Ohm=.86dB,18AWG:4Ohm=2.49dB,dB,下面的數(shù)據(jù)是JBL出的建議，一些工程師認(rèn)為過于保守，我們不妨把它當(dāng)做最低標(biāo)準(zhǔn)看待（原來的英尺距離已經(jīng)換算為米3米,8&16Ohm負(fù)載=20AWG?7.6米,4Ohm負(fù)載=15-20AWG?7.6米,8&16Ohm負(fù)載=20AWG?15.24米4Ohm負(fù)載=15AWG?15.24,8Ohm載=15AWG?15.24米,16Ohm負(fù)載=20AWG?0米,4Ohm載=10AWG?30米,8Ohm負(fù)載15AWG?30米,載=18AWG?45.72,4Ohm載=8AWG?45.72米,8Ohm負(fù)=12AWG?45.72米負(fù)載=15AWG?60米,4Ohm負(fù)載=8AWG?60米,8Ohm載=10AWG?60米,16Ohm負(fù)載=10-15AWG在功率大，距離長的場(chǎng)合，一定不要在喇叭線上吝嗇，試想瓦功率的輸出，如果有很小的0.5插入損耗，結(jié)果是丟失瓦的輸出，太劃不來。注：本文中的AWG—Gauge（美國線標(biāo)準(zhǔn)）是國際通用的線規(guī)，為了幫助大家對(duì)線規(guī)有進(jìn)一步的了解，特附上AWG直徑、電阻率對(duì)照表。＊dBmWattWatts変表＊＊dBm-MilliWatt換表dBm

M‐WatM‐WatM‐WatM‐WatM‐WatM‐WatM‐WatdBmdBmdBmdBmdBmdBmttttttt-18.-11.-1580.07760.3802.71.869.69.120125-17.-11.-1620.07940.3892.81.919.79.339016-17.-10.-1660.08130.3982.91.959.89.558907-17.-10.-1700.08320.4073.02.009.99.777898

44.745.746.847.9

23.423.523.623.7

219224229234

-17.-10.-1740.08510.4173.12.046780-17.-10.-1780.08710.4273.22.095671-17.-10.-1820.08910.4373.32.144562-17.-10.-1860.09120.4473.42.193453-17.-10.-1910.09330.4573.52.242344-17.-10.-1950.09550.4683.62.291235-17.-10.-2000.09770.4793.72.340126-16.-10.-2040.1000.4903.82.409017-16.-209-9.90.1020.5013.92.45808-16.-214-9.80.1050.5134.02.51799-16.0..021-2.11.-9.70.1070.5254.12.576980-16.-224-9.60.1100.5374.22.63571-16.-229-9.50.1120.5504.32.69462-16.-234-9.40.1150.5624.42.75353-16.-240-9.30.1170.5754.52.82244-16.-245-9.20.1200.5894.62.88135-16.-251-9.10.1230.6034.72.95026-15.-257-9.00.1260.6174.83.02917-15.-263-8.90.1290.6314.93.09808-15.-269-8.80.1320.6465.03.16799

10.010.210.510.711.011.211.511.712.012.312.612.913.213.513.814.114.514.815.215.5

16.917.017.417.517.617.717.817.918.018.418.518.618.718.8

49.050.151.352.553.755.056.257.558.960.361.763.164.666.167.669.270.872.474.175.9

23.823.924.024.424.524.624.724.824.925.025.425.525.625.7

240245251257263269275282288295302309316324331339347355363372-15.0.0275-8.70.135-1.0.6615.13.2412.

15.818.77.625.

380

680

9

8-15.-282-8.60.1380.6765.23.31571-15.-288-8.50.1410.6925.33.39462-15.-295-8.40.1450.7085.43.47353-15.-302-8.30.1480.7245.53.55244-15.-309-8.20.1510.7415.63.63135-15.-316-8.10.1550.7595.73.72026-14.-324-8.00.1580.7765.83.80917-14.-331-7.90.1620.7945.93.89808-14.-339-7.80.1660.8136.03.98799-14.-347-7.70.1700.8326.14.07680-14.-355-7.60.1740.8516.24.17571-14.-363-7.50.1780.8716.34.27462-14.-372-7.40.1820.8916.44.37353-14.-380-7.30.1860.9126.54.47244-14.-389-7.20.1910.9336.64.57135-14.-398-7.10.1950.9556.74.68026-13.-407-7.00.2000.9776.84.79917

16.216.617.017.417.818.218.619.119.520.020.420.921.421.922.422.923.4

19.019.419.519.619.719.819.920.020.420.520.6

79.481.383.291.283.395.597.7100102105107110112115

25.926.026.426.526.626.726.826.927.027.427.5

389398407417427437447457468479490501513525537550562-13.8-13.7-13.6

0.0417-6.90.2040.01.000.0427-6.80.2090.11.020.0437-6.70.2140.21.05

6.94.907.05.017.15.13

13.813.914.0

24.024.525.1

20.720.820.9

117120123

27.627.727.8

575589603

-13.5-13.4-13.3-13.2-13.1-13.0-12.9-12.8-12.7-12.6-12.5-12.4-12.3-12.2

0.0447-6.60.2190.31.070.0457-6.50.2468-6.40.22479-6.30.23490-6.20.240501-6.10.24513-6.00.25525-5.90.2571.01.260.0537-5.80.2631.11.290.0550-5.70.2691.21.320.0562-5.60.2751.31.350.0575-5.50.2821.41.380.0589-5.40.2881.51.410.0603-5.30.2951.61.45

7.25.257.35.377.45.507.55.627.65.757.75.897.86.06.318.16.468.26.618.36.768.46.928.57.08

14.414.514.614.714.814.915.015.4

25.726.326.927.528.228.829.530.230.931.632.433.133.934.7

21.021.421.521.621.721.821.922.0

126129132135138141145148151155158162166170

27.928.028.428.528.628.728.828.929.029.129.2

617631646661676692708724741759776794813832-12.1

0.0617-5.20.3021.71.48

8.6.

7.24

15.5

35.5

22.4

174

29.3

851-12.0-11.9-11.8-11.7-11.6

0.0631-5.10.3091.81.510.0646-5.00.3161.91.550.0661-4.90.3242.01.580.0676-4.80.3312.11.620.0692-4.70.3392.21.66

8.77.418.87.598.97.769.07.949.18.13

15.615.715.815.916.0

36.337.238.038.939.8

22.522.622.722.822.9

178182186191195

29.429.529.629.729.8

871891912933955-11.0.0708-4.60.3472.31.70

9.28.3216.40.723.20029.

977

5

1

0

9-11.4

0.0724-4.50.3552.41.74

9.38.51

16.2

41.7

23.1

204

30.0

1000-11.3-11.2

0.0741-4.40.3632.51.780.0759-4.30.3722.61.82

9.48.719.58.91

16.316.4

42.743.7

23.223.3

209―214―

――＊dBm-Watts換表dBm

WattWattWattdBmdBmdBmWattsdBmWattsdBmWattsdBmWattsdBmWattssss95.058.64.2690.070.10000.01.023.8052.50708.001850290630004.558.64.2750.01.053.8953.70741.0029603007404.858.64.2820.01.073.9855.00759.00307041085009.058.64.2880.01.104.0756.20776.0041805209605.559.64.2950.01.124.1757.50794.0052906300705.859.64.3020.01.154.2758.90813.00630074018024.059.64.3090.01.174.3760.30832.0074108502906.659.65.3160.01.204.4761.70851.0085209603007.059.65.3240.01.234.5763.10871.0096300704107.459.65.3310.01.264.6864.60891.0007401805207.859.65.3390.01.294.7966.10912.00185029063051.059.65.3470.01.324.9067.60933.0029603007408.648.54.257.059.65.3550.01.355.0169.20955.00307041085063.059.65.3630.01.385.1370.80977.004180520960

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9.548.54.269.060.1000.065.3720.01.415.2572.40529063000700.048.54.275.060.1020.065.3800.01.455.3774.10630074010800.448.54.282.060.1050.065.3890.01.485.5075.90741085020900.948.54.288.060.1070.066.3980.01.515.6277.60852096030001.449.54.295.060.1100.066.4070.01.555.7579.40963007040101.949.54.302.060.1120.066.4170.01.585.8981.30074018050202.449.54.309.060.1150.066.4270.01.626.0383.20185029060302.949.55.316.060.1170.066.4370.01.666.1785.10296030070403.449.55.324.060.1200.066.4470.01.706.3187.10307041080504.049.55.331.060.1230.066.4570.01.746.4689.10418052090604.549.55.339.061.1260.066.4680.01.786.6191.205290630007047.061.1290.066.4790.01.826.7693.30630074010805.749.55.355.061.1320.066.4900.01.866.9295.50741085020906.349.55.363.061.1350.067.5010.01.917.0897.70852096030006.950.100.055.372.061.1380.067.5130.01.957.249630007040107.550.102.055.380.061.1410.067.5250.02.007.4107401080502055.389.061.1450.067.5370.02.047.591850209060308.850.107.056.398.061.1480.067.5500.02.097.762960300070409.550.110.056.407.061.1510.067.5620.02.147.9430704010805056.417.061.1550.067.5750.02.198.1341805020906033.2.2439.8.3244.30.950.115.056.427.062.1580.067.5890.0

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5290603000701.650.117.056.437.062.1620.067.6030.02.298.516300704010802.450.120.056.447.062.1660.067.6170.02.348.7174108050209056.457.062.1700.068.6310.02.408.918520906030003.951.126.056.468.062.1740.068.6460.02.459.129630007040104.751.129.056.479.062.1780.068.6610.02.519.330740108050205.551.132.056.490.062.1820.068.6760.02.579.5518502090603034.