Is é American Wire Gauge (AWG) an bealach caighdeánach chun méid sreang a chur in iúl i Meiriceá Thuaidh.In AWG, dá mhéad an líon, is lú an trastomhas agus an tiús sreang.Is é 0000 AWG an méid caighdeánach is mó, agus is é 40 AWG an méid caighdeánach is lú.Is féidir tomhsaire sreang Brown & Sharpe a thabhairt air freisin nó go simplí tomhsaire na sreinge.
Tá AWG le haghaidh sreang aonshnáithe, sholadach, chruinn, seoltaí leictreach.Tugadh isteach é den chéad uair i 1857 mar chaighdeán chun na tomhais éagsúla a úsáideann monaróirí éagsúla a athsholáthar.Tá úsáid uimhreacha níos mó a léiríonn sreanga níos lú cosúil le Standard Wire Gauge, a úsáidtear sa Bhreatain.Úsáideann an chuid is mó de na tíortha eile caighdeán méadrach idirnáisiúnta trasghearrtha sreinge i milliméadar cearnach (mm2) a shainítear sa Choimisiún Leictriteicniúil Idirnáisiúnta 60228.
Ní chuimsíonn méid AWG méid an inslithe a chosnaíonn sreang.
Sainmhínítear 0000 AWG mar 0.46 orlach ar trastomhas, agus sainmhínítear 36 AWG mar 0.005 orlach ar trastomhas.Díorthaítear na méideanna eile go léir mar chéimeanna logartamach idir an dá mhéid sainithe seo.Tá 39 céimeanna tomhais idir na méideanna seo, agus tá an cóimheas idir 1-go-92 trastomhas.Dá bhrí sin, is é gach céim AWG an 39ú fréamh de 92, nó thart ar 1.12293 uair an t-athrú trastomhas.
Is féidir le sreang tomhsaire níos lú (méid níos mó) níos mó leictreachais a sheoladh go sábháilte ná sreang tomhsaire níos mó (méid níos lú).Má laghdaítear méid AWG na sreinge faoi thrí, déanfar achar trasghearrtha na sreinge a dhúbailt agus an méid sruth is féidir léi a iompar faoi dhó.Trí mhéid an AWG a athrú faoi 10 athrófar an trasghearradh faoi dheichniúr.
Ós rud é nach bhfuil alúmanam chomh maith le seoltóir agus copar, chun a ríomh cé mhéad sruth is féidir le sreang alúmanaim a iompar i gcomparáid le copar, a mheas go bhfuil sé AWG 2-thomhais níos mó.
AWG | Trastomhas | Achar (mm2) | 电阻值 (Óm/km) | AWG | Trastomhas | Achar (mm2) | 电阻值 (Óm/km) | ||
公制mm | 英制 orlach | 公制mm | 英制 orlach | ||||||
4/0 | 11.68 | 0. 46 | 107.22 | 0. 17 | 22 | 0. 643 | 0.0253 | 0. 3247 | 54.3 |
3/0 | 10.40 | 0. 4096 | 85.01 | 0. 21 | 23 | 0. 574 | 0.0226 | 0. 2588 | 66.8 |
2/0 | 9.27 | 0. 3648 | 67.43 | 0. 26 | 24 | 0. 511 | 0.0201 | 0. 2047 | 89.4 |
1/0 | 8.25 | 0. 3249 | 53.49 | 0. 33 | 25 | 0. 44 | 0. 0179 | 0. 1624 | 106 |
1 | 7.35 | 0. 2893 | 42.41 | 0. 42 | 26 | 0. 404 | 0. 0159 | 0. 1281 | 143 |
2 | 6.54 | 0. 2576 | 33.62 | 0. 53 | 27 | 0. 361 | 0. 0142 | 0. 1021 | 168 |
3 | 5.83 | 0. 2294 | 26.67 | 0.66 | 28 | 0. 32 | 0. 0126 | 0. 0804 | 227 |
4 | 5. 19 | 0. 2043 | 21.15 | 0.84 | 29 | 0. 287 | 0. 0113 | 0. 0647 | 289 |
5 | 4.62 | 0. 1819 | 16.77 | 1. 06 | 30 | 0. 254 | 0. 0100 | 0. 0507 | 361 |
6 | 4.11 | 0. 1620 | 13.30 | 1.33 | 31 | 0. 226 | 0. 0089 | 0.0401 | 430 |
7 | 3.67 | 0. 1443 | 10.55 | 1.68 | 32 | 0. 203 | 0. 0080 | 0. 0316 | 583 |
8 | 3.26 | 0. 1285 | 8.37 | 2. 11 | 33 | 0. 18 | 0. 0071 | 0.0255 | 944 |
9 | 2. 91 | 0. 1144 | 6.63 | 2.67 | 34 | 0. 16 | 0. 0063 | 0.0201 | 956 |
10 | 2. 59 | 0. 1019 | 5.26 | 3.36 | 35 | 0. 142 | 0. 0056 | 0. 0169 | 1,200 |
11 | 2. 30 | 0. 0907 | 4.17 | 4.24 | 36 | 0. 127 | 0. 0050 | 0. 0127 | 1,530 |
12 | 2. 05 | 0.0808 | 3. 332 | 5.31 | 37 | 0. 114 | 0. 0045 | 0. 0098 | 1,788 |
13 | 1.82 | 0.0720 | 2. 627 | 6.69 | 38 | 0. 102 | 0. 0040 | 0. 0081 | 2,400 |
14 | 1.63 | 0. 0641 | 2. 075 | 8.45 | 39 | 0. 089 | 0. 0035 | 0. 0062 | 2,740 |
15 | 1. 45 | 0. 0571 | 1. 646 | 10.6 | 40 | 0. 079 | 0. 0031 | 0. 0049 | 4,080 |
16 | 1.29 | 0. 0508 | 1. 318 | 13.5 | 41 | 0. 071 | 0.0028 | 0. 0040 | 4,264 |
17 | 1.15 | 0. 0453 | 1. 026 | 16.3 | 42 | 0. 064 | 0.0025 | 0. 0032 | 6,300 |
18 | 1. 02 | 0. 0403 | 0. 8107 | 21.4 | 43 | 0. 056 | 0.0022 | 0.0025 | 6,936 |
19 | 0. 912 | 0. 0359 | 0. 5667 | 26.9 | 44 | 0. 051 | 0.0020 | 0.0020 | 9,180 |
20 | 0. 813 | 0.0320 | 0. 5189 | 33.9 | 45 | 0. 046 | 0.0018 | 0.0016 | 10,200 |
21 | 0. 724 | 0. 0285 | 0. 4116 | 42.7 | 46 | 0. 041 | 0.0016 | 0. 0013 | 16,300 |
AWG | 外径 | 截面积 (mm2) | 电阻值 (Óm/km) | AWG | Trastomhas | 截面积 (mm2) | 电阻值 (Óm/km) | ||
公制mm | 英制 orlach | 公制mm | 英制 orlach | ||||||
4/0 | 11.68 | 0. 46 | 107.22 | 0. 17 | 22 | 0. 643 | 0.0253 | 0. 3247 | 54.3 |
3/0 | 10.40 | 0. 4096 | 85.01 | 0. 21 | 23 | 0. 574 | 0.0226 | 0. 2588 | 66.8 |
2/0 | 9.27 | 0. 3648 | 67.43 | 0. 26 | 24 | 0. 511 | 0.0201 | 0. 2047 | 89.4 |
1/0 | 8.25 | 0. 3249 | 53.49 | 0. 33 | 25 | 0. 44 | 0. 0179 | 0. 1624 | 106 |
1 | 7.35 | 0. 2893 | 42.41 | 0. 42 | 26 | 0. 404 | 0. 0159 | 0. 1281 | 143 |
2 | 6.54 | 0. 2576 | 33.62 | 0. 53 | 27 | 0. 361 | 0. 0142 | 0. 1021 | 168 |
3 | 5.83 | 0. 2294 | 26.67 | 0.66 | 28 | 0. 32 | 0. 0126 | 0. 0804 | 227 |
4 | 5. 19 | 0. 2043 | 21.15 | 0.84 | 29 | 0. 287 | 0. 0113 | 0. 0647 | 289 |
5 | 4.62 | 0. 1819 | 16.77 | 1. 06 | 30 | 0. 254 | 0. 0100 | 0. 0507 | 361 |
6 | 4.11 | 0. 1620 | 13.30 | 1.33 | 31 | 0. 226 | 0. 0089 | 0.0401 | 430 |
7 | 3.67 | 0. 1443 | 10.55 | 1.68 | 32 | 0. 203 | 0. 0080 | 0. 0316 | 583 |
8 | 3.26 | 0. 1285 | 8.37 | 2. 11 | 33 | 0. 18 | 0. 0071 | 0.0255 | 944 |
9 | 2. 91 | 0. 1144 | 6.63 | 2.67 | 34 | 0. 16 | 0. 0063 | 0.0201 | 956 |
10 | 2. 59 | 0. 1019 | 5.26 | 3.36 | 35 | 0. 142 | 0. 0056 | 0. 0169 | 1,200 |
11 | 2. 30 | 0. 0907 | 4.17 | 4.24 | 36 | 0. 127 | 0. 0050 | 0. 0127 | 1,530 |
12 | 2. 05 | 0.0808 | 3. 332 | 5.31 | 37 | 0. 114 | 0. 0045 | 0. 0098 | 1,788 |
13 | 1.82 | 0.0720 | 2. 627 | 6.69 | 38 | 0. 102 | 0. 0040 | 0. 0081 | 2,400 |
14 | 1.63 | 0. 0641 | 2. 075 | 8.45 | 39 | 0. 089 | 0. 0035 | 0. 0062 | 2,740 |
15 | 1. 45 | 0. 0571 | 1. 646 | 10.6 | 40 | 0. 079 | 0. 0031 | 0. 0049 | 4,080 |
16 | 1.29 | 0. 0508 | 1. 318 | 13.5 | 41 | 0. 071 | 0.0028 | 0. 0040 | 4,264 |
17 | 1.15 | 0. 0453 | 1. 026 | 16.3 | 42 | 0. 064 | 0.0025 | 0. 0032 | 6,300 |
18 | 1. 02 | 0. 0403 | 0. 8107 | 21.4 | 43 | 0. 056 | 0.0022 | 0.0025 | 6,936 |
19 | 0. 912 | 0. 0359 | 0. 5667 | 26.9 | 44 | 0. 051 | 0.0020 | 0.0020 | 9,180 |
20 | 0. 813 | 0.0320 | 0. 5189 | 33.9 | 45 | 0. 046 | 0.0018 | 0.0016 | 10,200 |
21 | 0. 724 | 0. 0285 | 0. 4116 | 42.7 | 46 | 0. 041 | 0.0016 | 0. 0013 | 16,300 |
Am postála: Lúnasa-01-2022