关于网张线规的问题？请高高手释疑...

<p>&nbsp;&nbsp;&nbsp; 超五类24线规，六类线23线规。这是目前常见线规。</p>
<p>&nbsp;</p>
<p>24线规是0.49-0.52？对否？</p>
<p>23线规是多少？</p>
<p>&nbsp;</p>
<p>有些品牌六类线用24线规？客观上讲会不会有质量问题而去降低成本？</p>
<p>&nbsp;</p>
<p>目前有哪些品牌六类线是24线规的？</p>

&nbsp;AWG (American Wire Gauge)又叫美国线规。<br/>是一种区分导线直径的标准，又被称为 <b><span class="extiw">Brown &amp; Sharpe</span>线规</b>。这种标准化线规系统于1857年起在<span class="mw-redirect">美国</span>开始使用。<br/><p>导线的直径与导线承载电流的能力有很大关系。线规数字越小，表示线材直径越粗，所能承载的电流就越大；反之，线规数字越大，表示线材直径越细，所能承载的电流就越小。</p>
<p>AWG表适用于单根、实心、圆形的导线。双绞线的AWG值由所有导线的总横截面积决定，并且由于双绞线之间总是有一些空隙，导致相同的AWG值双绞线的直径总是略大于单根导线的直径。</p>
<p>AWG数值应作为基本数值标注于数据线上。例如，组网使用的五类<span class="new">非屏蔽双绞线</span>一般使用AWG 24的线材，而SATA线一般是AWG 26线材。</p><p><br/></p><p>计算公式：<br/></p><p>定义直径0.005英寸为AWG 36，直径0.46英寸为AWG 0000。从AWG 36至AWG 0000等比共计40个值。可以根据如下公式计算出每种AWG值的实际直径：</p>
<dl><dd><img class="tex" alt="D_n = 0.005~\mathrm{inch} \times 92=" 92="" ^="" \frac{36-n}{39}="" src="http://upload.wikimedia.org/math/3/e/6/3e60e2e80dce25e1d478570b2e9b9528.png"/></dd></dl>
<p>或者</p>
<dl><dd><img class="tex" alt="D_n = 0.005~\mathrm{mm} \times 25.4 \times 92=" 92="" ^="" \frac{36-n}{39}="" src="http://upload.wikimedia.org/math/0/1/7/017515d197c8817fda5f3776f468ce7c.png"/></dd></dl>
<p>n代表AWG的值。</p>
<p>横截面积为：</p>
<dl><dd><img class="tex" alt="A_n = \frac{\pi}{4} D_n^2 = 0.000019635~\mathrm{inch}^2 \times 92=" 92="" ^="" \frac{36-n}{19.5}="" src="http://upload.wikimedia.org/math/a/0/5/a050868db46873cf19756c5c28914274.png"/>.</dd></dl>
<p>从直径计算AWG值可以通过如下公式：</p>
<dl><dd><img class="tex" alt="n=-39\log_{92} \left( \frac{D_{n}}{0.005~\mathrm{inch}} \right)+36" src="http://upload.wikimedia.org/math/d/5/6/d567d02578cca27458a9c85ec72f1dec.png"/> <sup id="_ref-1" class="reference">[2]</sup></dd></dl>
<p>AWG 00，AWG 000，AWG 0000的n分别使用-1，-2，-3。</p><p><br/></p><p><br/></p><br/><h2><span class="mw-headline">AWG尺寸对照表</span></h2>表格中的数据包括各种导线的阻抗和允许电流大小（安培）。表中的直径数值适用于实心电线。双绞线应当根据铜线<span class="new">横截面</span>面积进行计算。下面的表格适用于直流情况，或者<span class="mw-redirect">频率</span>小于等于60赫兹的情况，也没有考虑<span class="mw-redirect">集肤效应</span>。 　


<table class="wikitable" style="font-size: 85%; text-align: center; width: 407px; height: 876px;"><tbody><tr>
<th rowspan="2">AWG</th>
<th colspan="2">直径</th>
<th colspan="2">面积</th>
<th colspan="2">铜阻抗</th>
</tr>
<tr>
<th>(inch)</th>
<th>(mm)</th>
<th>(k<span class="extiw">cmil</span>)</th>
<th>(mm2)</th>
<th>(<span class="mw-redirect">Ω</span>/km)</th>
<th>(Ω/kFT)</th>
</tr>
<tr>
<td>0000 (4/0)</td>
<td>0.46</td>
<td>11.684</td>
<td>212</td>
<td>107</td>
<td>0.1608</td>
<td>0.04901</td>
</tr>
<tr>
<td>000 (3/0)</td>
<td>0.4096</td>
<td>10.404</td>
<td>168</td>
<td>85</td>
<td>0.2028</td>
<td>0.0618</td>
</tr>
<tr>
<td>00 (2/0)</td>
<td>0.3648</td>
<td>9.266</td>
<td>133</td>
<td>67.4</td>
<td>0.2557</td>
<td>0.07793</td>
</tr>
<tr>
<td>0 (1/0)</td>
<td>0.3249</td>
<td>8.252</td>
<td>106</td>
<td>53.5</td>
<td>0.3224</td>
<td>0.09827</td>
</tr>
<tr>
<td>1</td>
<td>0.2893</td>
<td>7.348</td>
<td>83.7</td>
<td>42.4</td>
<td>0.4066</td>
<td>0.1239</td>
</tr>
<tr>
<td>2</td>
<td>0.2576</td>
<td>6.544</td>
<td>66.4</td>
<td>33.6</td>
<td>0.5127</td>
<td>0.1563</td>
</tr>
<tr>
<td>3</td>
<td>0.2294</td>
<td>5.827</td>
<td>52.6</td>
<td>26.7</td>
<td>0.6465</td>
<td>0.197</td>
</tr>
<tr>
<td>4</td>
<td>0.2043</td>
<td>5.189</td>
<td>41.7</td>
<td>21.2</td>
<td>0.8152</td>
<td>0.2485</td>
</tr>
<tr>
<td>5</td>
<td>0.1819</td>
<td>4.621</td>
<td>33.1</td>
<td>16.8</td>
<td>1.028</td>
<td>0.3133</td>
</tr>
<tr>
<td>6</td>
<td>0.162</td>
<td>4.115</td>
<td>26.3</td>
<td>13.3</td>
<td>1.296</td>
<td>0.3951</td>
</tr>
<tr>
<td>7</td>
<td>0.1443</td>
<td>3.665</td>
<td>20.8</td>
<td>10.5</td>
<td>1.634</td>
<td>0.4982</td>
</tr>
<tr>
<td>8</td>
<td>0.1285</td>
<td>3.264</td>
<td>16.5</td>
<td>8.37</td>
<td>2.061</td>
<td>0.6282</td>
</tr>
<tr>
<td>9</td>
<td>0.1144</td>
<td>2.906</td>
<td>13.1</td>
<td>6.63</td>
<td>2.599</td>
<td>0.7921</td>
</tr>
<tr>
<td>10</td>
<td>0.1019</td>
<td>2.588</td>
<td>10.4</td>
<td>5.26</td>
<td>3.277</td>
<td>0.9989</td>
</tr>
<tr>
<td>11</td>
<td>0.0907</td>
<td>2.305</td>
<td>8.23</td>
<td>4.17</td>
<td>4.132</td>
<td>1.26</td>
</tr>
<tr>
<td>12</td>
<td>0.0808</td>
<td>2.053</td>
<td>6.53</td>
<td>3.31</td>
<td>5.211</td>
<td>1.588</td>
</tr>
<tr>
<td>13</td>
<td>0.072</td>
<td>1.828</td>
<td>5.18</td>
<td>2.62</td>
<td>6.571</td>
<td>2.003</td>
</tr>
<tr>
<td>14</td>
<td>0.0641</td>
<td>1.628</td>
<td>4.11</td>
<td>2.08</td>
<td>8.286</td>
<td>2.525</td>
</tr>
<tr>
<td>15</td>
<td>0.0571</td>
<td>1.45</td>
<td>3.26</td>
<td>1.65</td>
<td>10.45</td>
<td>3.184</td>
</tr>
<tr>
<td>16</td>
<td>0.0508</td>
<td>1.291</td>
<td>2.58</td>
<td>1.31</td>
<td>13.17</td>
<td>4.016</td>
</tr>
<tr>
<td>17</td>
<td>0.0453</td>
<td>1.15</td>
<td>2.05</td>
<td>1.04</td>
<td>16.61</td>
<td>5.064</td>
</tr>
<tr>
<td>18</td>
<td>0.0403</td>
<td>1.024</td>
<td>1.62</td>
<td>0.823</td>
<td>20.95</td>
<td>6.385</td>
</tr>
<tr>
<td>19</td>
<td>0.0359</td>
<td>0.912</td>
<td>1.29</td>
<td>0.653</td>
<td>26.42</td>
<td>8.051</td>
</tr>
<tr>
<td>20</td>
<td>0.032</td>
<td>0.812</td>
<td>1.02</td>
<td>0.518</td>
<td>33.31</td>
<td>10.15</td>
</tr>
<tr>
<td>21</td>
<td>0.0285</td>
<td>0.723</td>
<td>0.81</td>
<td>0.41</td>
<td>42</td>
<td>12.8</td>
</tr>
<tr>
<td style="background-color: rgb(255, 255, 0);">22</td>
<td style="background-color: rgb(255, 255, 0);">0.0253</td>
<td style="background-color: rgb(255, 255, 0);">0.644</td>
<td style="background-color: rgb(255, 255, 0);">0.642</td>
<td style="background-color: rgb(255, 255, 0);">0.326</td>
<td style="background-color: rgb(255, 255, 0);">52.96</td>
<td style="background-color: rgb(255, 255, 0);">16.14</td>
</tr>
<tr>
<td style="background-color: rgb(255, 255, 0);">23</td>
<td style="background-color: rgb(255, 255, 0);">0.0226</td>
<td style="background-color: rgb(255, 255, 0);">0.573</td>
<td style="background-color: rgb(255, 255, 0);">0.509</td>
<td style="background-color: rgb(255, 255, 0);">0.258</td>
<td style="background-color: rgb(255, 255, 0);">66.79</td>
<td style="background-color: rgb(255, 255, 0);">20.36</td>
</tr>
<tr>
<td style="background-color: rgb(255, 255, 0);">24</td>
<td style="background-color: rgb(255, 255, 0);">0.0201</td>
<td style="background-color: rgb(255, 255, 0);">0.511</td>
<td style="background-color: rgb(255, 255, 0);">0.404</td>
<td style="background-color: rgb(255, 255, 0);">0.205</td>
<td style="background-color: rgb(255, 255, 0);">84.22</td>
<td style="background-color: rgb(255, 255, 0);">25.67</td>
</tr>
<tr>
<td>25</td>
<td>0.0179</td>
<td>0.455</td>
<td>0.32</td>
<td>0.162</td>
<td>106.2</td>
<td>32.37</td>
</tr>
<tr>
<td>26</td>
<td>0.0159</td>
<td>0.405</td>
<td>0.254</td>
<td>0.129</td>
<td>133.9</td>
<td>40.81</td>
</tr>
<tr>
<td>27</td>
<td>0.0142</td>
<td>0.361</td>
<td>0.202</td>
<td>0.102</td>
<td>168.9</td>
<td>51.47</td>
</tr>
<tr>
<td>28</td>
<td>0.0126</td>
<td>0.321</td>
<td>0.16</td>
<td>0.081</td>
<td>212.9</td>
<td>64.9</td>
</tr>
<tr>
<td>29</td>
<td>0.0113</td>
<td>0.286</td>
<td>0.127</td>
<td>0.0642</td>
<td>268.5</td>
<td>81.84</td>
</tr>
<tr>
<td>30</td>
<td>0.01</td>
<td>0.255</td>
<td>0.101</td>
<td>0.0509</td>
<td>338.6</td>
<td>103.2</td>
</tr>
<tr>
<td>31</td>
<td>0.00893</td>
<td>0.227</td>
<td>0.0797</td>
<td>0.0404</td>
<td>426.9</td>
<td>130.1</td>
</tr>
<tr>
<td>32</td>
<td>0.00795</td>
<td>0.202</td>
<td>0.0632</td>
<td>0.032</td>
<td>538.3</td>
<td>164.1</td>
</tr>
<tr>
<td>33</td>
<td>0.00708</td>
<td>0.18</td>
<td>0.0501</td>
<td>0.0254</td>
<td>678.8</td>
<td>206.9</td>
</tr>
<tr>
<td>34</td>
<td>0.0063</td>
<td>0.16</td>
<td>0.0398</td>
<td>0.0201</td>
<td>856</td>
<td>260.9</td>
</tr>
<tr>
<td>35</td>
<td>0.00561</td>
<td>0.143</td>
<td>0.0315</td>
<td>0.016</td>
<td>1079</td>
<td>329</td>
</tr>
<tr>
<td>36</td>
<td>0.005</td>
<td>0.127</td>
<td>0.025</td>
<td>0.0127</td>
<td>1361</td>
<td>414.8</td>
</tr>
<tr>
<td>37</td>
<td>0.00445</td>
<td>0.113</td>
<td>0.0198</td>
<td>0.01</td>
<td>1716</td>
<td>523.1</td>
</tr>
<tr>
<td>38</td>
<td>0.00397</td>
<td>0.101</td>
<td>0.0157</td>
<td>0.00797</td>
<td>2164</td>
<td>659.6</td>
</tr>
<tr>
<td>39</td>
<td>0.00353</td>
<td>0.0897</td>
<td>0.0125</td>
<td>0.00632</td>
<td>2729</td>
<td>831.8</td>
</tr>
<tr>
<td>40</td>
<td>0.00314</td>
<td>0.0799</td>
<td>0.00989</td>
<td>0.00501</td>
<td>3441</td>
<td>1049</td></tr></tbody></table><br/>以上资料摘自，维基百科<br/><br/><span class="t18">ANSI/TIA/EIA-568-B.2-1的“6.1.1水平线缆”章节对线缆的结构定义如下“……线缆应由22到24线规热塑性塑料绝缘的实心导线，组成4组单独绞合的线对，并由热塑性塑料外皮包裹而构成……”</span><span class="t18">标准并未规定６类线缆必须要有隔离构件和粗导体，只要传输性能符合标准中的新规定（ANSI/TIA/EIA-
568-B.2-1）即可。当然最好能够通过ETL的第三方认证测试。总之，尽管布线厂商采用不同的制造工艺制造６类线缆，但是殊途同归，最后必须满足６
类标准规定性能要求。<br/><br/>具体的产品恐怕要你自己查一下了 </span><br/><br/>

[此贴子已经被作者于2009-6-11 11:26:05编辑过]

确是行家，感谢。

<p>23线规是多股（0.57），24线规是多股（7X0.20）。我们的线缆LASUN有24线规的，绝对保证质量！</p>

<p>怎么老是重复呀？有资料的能不能发我邮箱吗？积分不够哇真郁闷呐！<a href="mailto:354022744xiongqi@126.com">354022744xiongqi@126.com</a></p>
<p>有重谢!呵呵~~~~~有什么不便请见谅！咱学习就这样，不耻下问呐！！！</p>

<p>俺的积分还差好多诶</p>