From 76a2cc3862719280d61650bc65fe606c5f564514 Mon Sep 17 00:00:00 2001 From: admin Date: Wed, 26 Aug 2026 14:45:18 +0800 Subject: [PATCH] =?UTF-8?q?docs:=20=E6=96=B0=E5=A2=9E=20AWG=20=E7=BA=BF?= =?UTF-8?q?=E8=A7=84=E5=AF=B9=E7=85=A7=E8=A1=A8=EF=BC=88=E5=90=AB=20mm?= =?UTF-8?q?=C2=B2=20=E9=80=9F=E6=9F=A5=E4=B8=8E=E7=BA=BF=E5=9C=88=E9=80=89?= =?UTF-8?q?=E7=BA=BF=E5=A4=87=E6=B3=A8=EF=BC=89?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- references/awg对照表.csv | 35 ++++++++++++++++++ references/awg对照表.md | 80 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 115 insertions(+) create mode 100644 references/awg对照表.csv create mode 100644 references/awg对照表.md diff --git a/references/awg对照表.csv b/references/awg对照表.csv new file mode 100644 index 0000000..a15beff --- /dev/null +++ b/references/awg对照表.csv @@ -0,0 +1,35 @@ +AWG,直径mm,直径in,截面积mm2,铜电阻_20C_Ohm_per_km,参考载流量A +4/0 (0000),11.684,0.4600,107.2,0.1608,230 +3/0 (000),10.404,0.4096,85.0,0.2028,200 +2/0 (00),9.266,0.3648,67.4,0.2556,175 +1/0 (0),8.251,0.3249,53.5,0.3224,150 +1,7.348,0.2893,42.4,0.4066,130 +2,6.544,0.2576,33.6,0.5127,115 +3,5.827,0.2294,26.7,0.6470,100 +4,5.189,0.2043,21.2,0.8152,85 +5,4.621,0.1819,16.8,1.028,70 +6,4.115,0.1620,13.3,1.296,65 +7,3.665,0.1443,10.5,1.634,55 +8,3.264,0.1285,8.37,2.061,50 +9,2.906,0.1144,6.63,2.599,42 +10,2.588,0.1019,5.26,3.277,35 +11,2.305,0.0907,4.17,4.132,30 +12,2.053,0.0808,3.31,5.211,25 +13,1.828,0.0720,2.62,6.571,22 +14,1.628,0.0641,2.08,8.286,20 +15,1.450,0.0571,1.65,10.45,17 +16,1.291,0.0508,1.31,13.17,18 +17,1.150,0.0453,1.04,16.61,13 +18,1.024,0.0403,0.823,20.95,14 +19,0.912,0.0359,0.653,26.42,10 +20,0.812,0.0320,0.518,33.31,5 +21,0.723,0.0285,0.410,42.00,4 +22,0.644,0.0253,0.326,52.96,3 +23,0.573,0.0226,0.258,66.79,2.5 +24,0.511,0.0201,0.205,84.22,2 +25,0.455,0.0179,0.162,106.2,1.7 +26,0.405,0.0159,0.129,133.9,1.4 +27,0.361,0.0142,0.102,168.9,1.2 +28,0.321,0.0126,0.0810,212.9,1.0 +29,0.286,0.0113,0.0642,268.5,0.8 +30,0.255,0.0100,0.0509,338.6,0.6 diff --git a/references/awg对照表.md b/references/awg对照表.md new file mode 100644 index 0000000..a89d553 --- /dev/null +++ b/references/awg对照表.md @@ -0,0 +1,80 @@ +# AWG 线规对照表（美国线规 American Wire Gauge） + +> 数据基准：铜导体，20°C 直流电阻；载流量为工程参考值（NEC 75°C 铜表 + 小线规常规参考），实际选型需按敷设方式、环境温度、绝缘等级降额。 + +## 一、完整对照表（AWG 4/0 ~ 30） + +| AWG | 直径 (mm) | 直径 (in) | 截面积 (mm²) | 铜电阻 @20°C (Ω/km) | 参考载流量 (A) | +|-----|-----------|-----------|--------------|---------------------|----------------| +| 4/0 (0000) | 11.684 | 0.4600 | 107.2 | 0.1608 | 230 | +| 3/0 (000) | 10.404 | 0.4096 | 85.0 | 0.2028 | 200 | +| 2/0 (00) | 9.266 | 0.3648 | 67.4 | 0.2556 | 175 | +| 1/0 (0) | 8.251 | 0.3249 | 53.5 | 0.3224 | 150 | +| 1 | 7.348 | 0.2893 | 42.4 | 0.4066 | 130 | +| 2 | 6.544 | 0.2576 | 33.6 | 0.5127 | 115 | +| 3 | 5.827 | 0.2294 | 26.7 | 0.6470 | 100 | +| 4 | 5.189 | 0.2043 | 21.2 | 0.8152 | 85 | +| 5 | 4.621 | 0.1819 | 16.8 | 1.028 | 70* | +| 6 | 4.115 | 0.1620 | 13.3 | 1.296 | 65 | +| 7 | 3.665 | 0.1443 | 10.5 | 1.634 | 55* | +| 8 | 3.264 | 0.1285 | 8.37 | 2.061 | 50 | +| 9 | 2.906 | 0.1144 | 6.63 | 2.599 | 42* | +| 10 | 2.588 | 0.1019 | 5.26 | 3.277 | 35 | +| 11 | 2.305 | 0.0907 | 4.17 | 4.132 | 30* | +| 12 | 2.053 | 0.0808 | 3.31 | 5.211 | 25 | +| 13 | 1.828 | 0.0720 | 2.62 | 6.571 | 22* | +| 14 | 1.628 | 0.0641 | 2.08 | 8.286 | 20 | +| 15 | 1.450 | 0.0571 | 1.65 | 10.45 | 17* | +| 16 | 1.291 | 0.0508 | 1.31 | 13.17 | 18 | +| 17 | 1.150 | 0.0453 | 1.04 | 16.61 | 13* | +| 18 | 1.024 | 0.0403 | 0.823 | 20.95 | 14 | +| 19 | 0.912 | 0.0359 | 0.653 | 26.42 | 10* | +| 20 | 0.812 | 0.0320 | 0.518 | 33.31 | 5* | +| 21 | 0.723 | 0.0285 | 0.410 | 42.00 | 4* | +| 22 | 0.644 | 0.0253 | 0.326 | 52.96 | 3* | +| 23 | 0.573 | 0.0226 | 0.258 | 66.79 | 2.5* | +| 24 | 0.511 | 0.0201 | 0.205 | 84.22 | 2* | +| 25 | 0.455 | 0.0179 | 0.162 | 106.2 | 1.7* | +| 26 | 0.405 | 0.0159 | 0.129 | 133.9 | 1.4* | +| 27 | 0.361 | 0.0142 | 0.102 | 168.9 | 1.2* | +| 28 | 0.321 | 0.0126 | 0.0810 | 212.9 | 1.0* | +| 29 | 0.286 | 0.0113 | 0.0642 | 268.5 | 0.8* | +| 30 | 0.255 | 0.0100 | 0.0509 | 338.6 | 0.6* | + +带 `*` 为相邻偶数规格插值/常规工程参考，非标准表正式值。 + +## 二、中国常用 mm² ↔ AWG 速查 + +| mm² | 约等 AWG | 常见用途 | +|-----|----------|----------| +| 0.2 | 24 | 细信号线 | +| 0.3 | 22 | 屏蔽双绞引线 | +| 0.5 | 20 | 信号/控制线 | +| 0.75 | 18 | 控制线、灯线 | +| 1.0 | 17 | 控制回路 | +| 1.5 | 15 | 环路线圈本体、照明 | +| 2.5 | 13 | 环路线圈本体、插座回路 | +| 4 | 11 | 道闸/电机主回路 | +| 6 | 9 | 道闸电机、小功率设备 | +| 10 | 7 | 设备电源进线 | +| 16 | 5 | 配电支路 | +| 25 | 3 | 配电干路 | +| 35 | 2 | 总进线 | +| 50 | 1/0 | 总进线 | +| 70 | 2/0 | 大功率进线 | +| 95 | 3/0 | 大功率进线 | +| 120 | 4/0 | 大功率进线 | + +## 三、速记口诀 + +- **每 3 档 AWG：截面积 ×2 或 ÷2**（如 10→7→4，截面积约 ×2 每档 3 级） +- **每 6 档 AWG：直径 ×2 或 ÷2** +- **号数越大线越细**；AWG 10 ≈ 5.26 mm²，可用作心算锚点 +- 电阻与截面积成反比：每 3 档 AWG，电阻约 ×2 或 ÷2 + +## 四、环路线圈应用备注（车检器） + +1. **线圈本体绕线**：常用 1.5~2.5 mm²（AWG 15~13）多股软铜线，绝缘耐温 ≥105°C、绝缘耐压 ≥500V——切缝积水、电缆沟潮湿环境必须扛得住。 +2. **引线到检测器**：推荐屏蔽双绞线 AWG 22~24（0.3~0.5 mm²），绞距要密，屏蔽层单端接地。别用太细的线（<0.5 mm²），端子压接处容易断。 +3. **注意**：环路工作在几十 kHz 振荡，趋肤效应影响小，多股线即可。但引线超过 50m 时要考虑分布电容对振荡频率的影响——**线规不是唯一变量**，引线长度和绞合方式同样关键。 +4. 检测器端子电流是 mA 级，线规主要看机械强度与压接可靠性，不必按载流量选。