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電線ケーブル技術資料
電線およびケーブルの許容電流
許容電流
許容電流とは、規格上電線などに流すことのできる最大の電流のことです。物体には電気抵抗があり、その物体に電圧をかけて電流を流すと抵抗によって発熱します。電線などの導体にも小さいながら抵抗があり、その発熱によって絶縁被覆が溶解すれば電気は短絡したり、場合によっては発火したりします。そのため電線にはそれぞれ許容電流が定められてあり、配線用遮断器などでこれを保護します。
資料1 KV,KIV, IV, VSF許容電流値参考資料
※[ ]内は許容電流×80%値
資料2 600VケーブルVCT
許容電流値参考資料
※[ ]内は許容電流×80%値
使用電圧 |
AWG型番 |
種類 |
許容電流(A) |
素線数/素線経 |
仕上り外径 |
|||||
100V |
#22 |
KV |
0.3 |
mm2 |
3 |
[2.4] |
12/ |
0.18 mm |
|
|
#20 |
|
0.5 |
|
6 |
[4.8] |
20/ |
|
|
|
|
#18 |
|
0.75 |
|
9 |
[7.2] |
30/ |
|
|
|
|
#16 |
|
1.25 |
|
15 |
[12.] |
50/ |
|
|
|
|
300V |
#20 |
VSF |
0.5 |
|
5 |
[4.] |
20/ |
0.18 mm |
|
|
#18 |
|
0.75 |
|
8 |
[6.4] |
30/ |
|
|
|
|
#16 |
|
1.25 |
|
13 |
[10.4] |
50/ |
|
|
|
|
#14 |
|
2 |
|
20 |
[16.] |
37/ |
0.26 mm |
|
|
|
600V |
#16 |
IV |
1.25 |
|
15 |
[12.] |
7/ |
0.45 |
3.0 |
mm |
#14 |
|
2 |
|
22 |
[17.6] |
7/ |
0.6 mm |
3.4 |
|
|
#12 |
|
3.5 |
|
37 |
[29.6] |
7/ |
0.8 |
4.0 |
|
|
#10 |
|
5.5 |
|
49 |
[39.2] |
7/ |
1.0 |
5.0 |
|
|
#8 |
|
8 |
|
61 |
[48.8] |
7/ |
1.2 |
6.0 |
|
|
#6 |
|
14 |
|
84 |
[67.2] |
7/ |
1.6 |
7.6 |
|
|
#4 |
|
22 |
|
105 |
[84] |
7/ |
2.0 |
9.2 |
|
|
#1,#2 |
|
38 |
|
139 |
[111.2] |
7/ |
2.6 |
11.5 |
|
|
|
|
60 |
|
145 |
[116.] |
10/ |
2.0 |
14.0 |
|
|
600V |
#12 |
KIV |
3.5 |
|
39 |
[31.2] |
|
|
4.0 |
|
#10 |
|
5.5 |
|
50 |
[40.] |
|
|
5.0 |
|
|
#8 |
|
8 |
|
61 |
[48.8] |
|
|
6. |
|
|
#6 |
|
14 |
|
84 |
[67.2] |
|
|
7.6 |
|
|
#4 |
|
22 |
|
115 |
[92.] |
|
|
9.2 |
|
|
#1,#2 |
|
38 |
|
162 |
[129.6] |
|
|
11.5 |
|
|
|
|
60 |
|
220 |
[176.] |
|
|
14.0 |
|
|
|
|
100 |
|
285 |
[228.] |
|
|
17.0 |
|
|
|
|
150 |
|
355 |
[284.] |
|
|
21.0 |
|
|
|
|
200 |
|
395 |
[316.] |
|
|
23.0 |
|
|
|
|
250 |
|
460 |
[368.] |
|
|
26.0 |
|
|
|
|
325 |
|
520 |
[416.] |
|
|
29.0 |
|
資料2 600VケーブルVCT 許容電流値参考資料
※[ ]内は許容電流×80%値
AWG |
公称断面積 |
空中配線工事 |
電線管配線&ピット工事 |
||||
2心(A) |
3心(A) |
4心(A) |
2心(A) |
3心(A) |
4心(A) |
||
#14 |
2 |
19 |
18 |
15 |
19 |
16 |
13 |
[15.2] |
[14.4] |
[12.] |
[15.2] |
[12.8] |
[10.4] |
||
#12 |
3.5 |
28 |
25 |
22 |
27 |
20 |
19 |
[22.4] |
[20.] |
[17.6] |
[21.6] |
[18.4] |
[15.2] |
||
#10 |
5.5 |
38 |
33 |
27 |
35 |
30 |
25 |
[30.4] |
[26.4] |
[21.6] |
[28.] |
[24.] |
[20.] |
||
#8 |
8 |
47 |
42 |
37 |
43 |
38 |
31 |
[37.6] |
[33.6] |
[29.6] |
[34.4] |
[30.4] |
[24.8] |
||
#6 |
14 |
67 |
60 |
53 |
60 |
52 |
44 |
[53.6] |
[48.] |
[42.4] |
[48.] |
[41.6] |
[35.2] |
||
#4 |
22 |
91 |
79 |
70 |
77 |
66 |
54 |
[72.8] |
[63.2] |
[56.] |
[61.6] |
[52.8] |
[43.2] |
||
#1,#2 |
38 |
130 |
105 |
91 |
105 |
89 |
70 |
[104.] |
[84.] |
[72.8] |
[84.] |
[71.2] |
[56.] |
||
|
60 |
170 |
140 |
125 |
135 |
115 |
95 |
[136.] |
[112.] |
[100.] |
[108.] |
[92.] |
[76.] |
||
|
100 |
240 |
200 |
180 |
180 |
155 |
130 |
[192.] |
[160.] |
[144.] |
[144.] |
[124.] |
[104.] |
||
|
150 |
315 |
265 |
235 |
230 |
195 |
180 |
[252.] |
[212.] |
[188.] |
[184.] |
[156.] |
[144.] |
||
|
200 |
365 |
310 |
275 |
265 |
235 |
205 |
[292.] |
[248.] |
[220.] |
[212.] |
[188.] |
[164.] |
||
|
250 |
430 |
365 |
325 |
305 |
270 |
230 |
[344.] |
[292.] |
[260.] |
[244.] |
[216.] |
[184.] |
||
|
325 |
495 |
425 |
380 |
350 |
305 |
260 |
[396.] |
[340.] |
[304.] |
[280.] |
[244.] |
[208.] |
||
|
400 |
565 |
|
|
515 |
|
|
[452.] |
|
|
[412.] |
|
|
||
|
500 |
625 |
|
|
565 |
|
|
[500.] |
|
|
[452.] |
|
|
||
|
600 |
715 |
|
|
645 |
|
|
[572.] |
|
|
[516.] |
|
|
||
|
800 |
850 |
|
|
750 |
|
|
[680.] |
|
|
[600.] |
|
|
||
|
1000 |
990 |
|
|
900 |
|
|
[792.] |
|
|
[720.] |
|
|
||
|
基底温度 |
40℃ |
|
|
25℃ |
|
|
|
導体温度 |
60℃ |
|
|
60℃ |
|
|