常用线规号码与线径对照表11.doc

常用线规号码与线径对照表线规SWGBWGBGAWG号码英寸毫米英寸毫米英寸毫米英寸毫米70605040302001234567891011121314151617181920212223242526050004640432040003720348032403000276025202320212019201760160014401280116010400920080007200640056004800400036003200280002400022000200001801270011786109731016094498839823076207010640158935385487744704046365832512946264223372032182916261422121910160914081307110610055905080457-0500045404250330034003000284025902380220020301800165014801340120010900950083007200650058004900420035003200280025002200200018-1270011532107959652863976207214657960455588515645724191375934043048276924132108182916511473124510670839081307110635055905080457066660625005883054160500001152039540353203147028040250002225019810176401570013980125001313009910088200785006990062500556004950044000392003490031250027820024760022040019611693215875149431375712700113081006989717993712263505652503244813988355131752827251722401994177515881412125711180996088707940707062905600498-05800051650460004096036480324902893025760229402043018190162001443012850114401019009070。0808007200064800571005080045300403003590032000285002535002010001790001594001420-147321311911684104049266825273486544582751894621411536653264290625882305205318281628145012911150102409120812072306440573051104550405常用线规号码与线径对照表线规SWGBWGBGAWG号码英寸毫米英寸毫米英寸毫米英寸毫米272829303132333435363738394041424344454647484950O0164O0149O0136O0124O0116O0109O0100O0092O0084O0076O006800060O0052O0048O0044O0040O0036O0032O0028O0024O0020O0016O。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美国线规American Wire Gauge音响发烧友对喇叭线的选择大有讲究，曾经听说过不乏有人花一万多元买一条线的。喇叭线的另外一个极端是随便找一条电线连上，出声就行。让我们离开这两个极端，从技术的角度看喇叭线的选择。过细的导线显然不会有好结果，因为细线的电阻大，更多的功率将消耗在导线的电阻上，低音的损失尤其严重。过粗的导线虽然电阻小，但是造成材料和金钱的浪费。通常认为导线上的损失（插入损耗）在0.5dB以下是可以容忍的。从功放输出到音箱的这部分电路中，喇叭的阻抗，导线的长度，导线的粗细都很重要，一般的做法是根据导线长度和喇叭阻抗来推算出导线的粗细。下面的数字显示100英尺（约30米）导线的线径、扬声器阻抗和插入损耗之间的关系。例如30米18号线，4欧姆阻抗扬声器，插入损耗是2.5dB，够大的了。大家知道，3dB的损失就意味着功放的输出损失一半！10AWG:4Ohm =.44dB, 8Ohm=.22 dB, 16Ohm=.11dB 12AWG: 4Ohm =.69dB, 8Ohm =.35 dB, 16Ohm =.18dB 14AWG:4Ohm=1.07dB, 8Ohm=.55dB, 16Ohm=.28dB 16AWG:4 Ohm=1.65dB, 8Ohm=.86dB, 16Ohm=.44dB 18AWG: 4Ohm=2.49dB, 8Ohm=1.33 dB, 16Ohm=.69dB下面的数据是JBL提出的建议，一些工程师认为过于保守，我们不妨把它当做最低标准看待（原来的英尺距离已经换算为米）。 3米, 4, 8&16Ohm负载=20AWG 7.6米, 4Ohm负载=15-20AWG 7.6米, 8&16Ohm负载=20AWG 15.24米, 4Ohm负载=10-15AWG 15.24米, 8Ohm负载=15AWG 15.24米, 16Ohm负载=15-20AWG 30米, 4Ohm负载=10AWG 30米, 8Ohm 负载=10-15AWG 30米, 16Ohm负载=15-18AWG 45.72米, 4Ohm负载=8AWG 45.72米, 8Ohm负载=12AWG 45.72米, 16Ohm负载=15AWG 60米, 4Ohm负载=5-8AWG 60米, 8Ohm负载=10AWG 60米, 16Ohm负载=10-15AWG在功率大，距离长的场合，一定不要在喇叭线上吝啬，试想1000瓦功率的输出，如果有很小的0.5 dB插入损耗，结果是丢失100瓦的输出，太划不来。注：本文中的AWGAmerican Wire Gauge（美国线径标准）是国际通用的线规，为了帮助大家对线规有进一步的了解，特附上AWG与直径、电阻率对照表。1Black黑9Grey灰2Brown棕10White白3Red红11Pink粉红4Orange橙12Light Green浅绿5Yellow黄13Deep Green深绿6Green绿14Green/Yellow绿滚黄7Blue兰15BlackWhite白注黑8Purple紫16Light Blue浅兰交流电AC绞向Lay Direction安培Ampere百万Mega美国试验与材料协会ASTM密耳Mil美国线规AWG千分之一Milli包扎物Binder麦拉Mylar电缆Cable美国电气制造商协会NEMA芯线绞合Cabling尼龙Nylon同轴电缆Coaxial Cable奥姆Ohm同心绞Concentric Stranding可塑剂Plasticizer导电率ConductivityPEPolyethylene导体ConductorPPPolypropylene花线CordPUPolyurethane安全电流Current CarryingPVCPolyvinyl Chloride直流DC电阻Resistance地线Drain Wire卷线Retaractile Cord电子工业协会EIA橡胶Rubber地线Earth美国汽车工程协会SAE铁氟龙FEP半硬质 PVCSemi-rigid PVC填充物Fillers隔离层Separator发泡聚乙烯Foamed PE隔离层Shield硬铜线Hard Brawn Copper Wire遮蔽率Shield Coverage电气电子工程师协会IEEE硅胶Silicone阻抗Impedance铁氟龙Teflon绝缘Insulation铁氟龙TFE幅射Irradiation铜箔丝Tinsel被覆Jacket耐热温度Thermal Rating绞距Lay垂直耐燃试验VW-1线规AWG(MCM)直径面积电流值(A)备注号码英寸毫米mm240(1.05)45(1)50(0.95)53518.30271.3439418.1397.19估算44416.83225.2390.76372.16353.55估算37315.23189.4350.69333.99317.29估算31313.72158.7313.99299.04284.09估算26312.92133.1281.3267.91254.51估算4/00.4611.684112.6253.38241.31229.253/00.409610.40492.1223.47212.83202.192/00.36489.26666.5182.32173.63164.961/00.32498.25256.3164.3156.47148.6510.28937.348144.8137.91131.0120.25766.54430.7112.47107.11101.7530.22945.827100.3995.0190.8340.20435.18921.590.0285.7381.4550.18194.62118