TINNED COPPER FUSE WIRE TABLE:
The following table is based on the information given in the I.E.E. Regulations 12th Edition 1950 table 21 Approximate sixes of fuse elements composed of tinned copper for use in semi enclosed fuses. The figures are an approximate guide only the current at which the fuse will blow will depend upon the construction of the fuse holder inn which wire is used. |
|||
S.W.G |
Current rating of Fuse in Amperes |
Approximate fusing Current |
|
40 |
1.5 |
3 |
|
39 |
2.5 |
4 |
|
38 |
3 |
5 |
|
37 |
3.5 |
6 |
|
36 |
4.5 |
7 |
|
35 |
5 |
8 |
|
34 |
5.5 |
9 |
|
33 |
6 |
10 |
|
32 |
7 |
11 |
|
31 |
8 |
12 |
|
30 |
8.5 |
13 |
|
29 |
10 |
16 |
|
28 |
12 |
18 |
|
27 |
13 |
23 |
|
26 |
14 |
28 |
|
25 |
15 |
30 |
|
24 |
17 |
33 |
|
23 |
20 |
38 |
|
22 |
24 |
48 |
|
21 |
29 |
58 |
|
20 |
34 |
70 |
|
19 |
38 |
81 |
|
18 |
45 |
106 |
|
17 |
65 |
135 |
|
16 |
73 |
166 |
|
15 |
78 |
197 |
|
14 |
102 |
230 |
|
13 |
130 |
295 |
|
H.G. FUSE RATINGS FOR TRANSFORMERS |
|||
Capacity of transformer in KVA |
H.T. Voltage |
Size of T.C. fuse wire in S.W.g |
Horn gap length in mm (inches) |
1500 |
33 KV |
2 x20 |
385 (15) |
3000/3150 |
- |
20 |
- |
1500/1600 |
- |
21 |
- |
1000 |
- |
22 |
- |
750 |
- |
23 |
- |
500 |
- |
26 |
- |
500 |
11 KV |
20 |
205 (8) |
250 |
- |
23 |
- |
100 |
- |
33 |
- |
75 |
- |
33 |
- |
63 |
- |
33 |
- |
50 |
- |
33 |
- |
25 |
- |
38 |
- |
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