| Table 5.3 - Maximum
impedance of circuit protective ----------------- conductors to allow 5 s disconnection time ----------------- for socket outlets |
||||||||
|
-
|
Maximum impedance of circuit protective
conductor
|
|||||||
|
Rating (A)
|
Fuse BS 88
|
Fuse BS 1361
|
Fuse BS 3036
|
MCB type 1
|
MCB type 2
|
MCB type 3 & C
|
MCB type B
|
MCB type D
|
|
5
|
-
|
3.25
|
3.25
|
2.50
|
1.43
|
1.00
|
-
|
0.50
|
|
6
|
2.48
|
-
|
-
|
2.08
|
1.19
|
0.83
|
1.67
|
0.42
|
|
10
|
1.48
|
-
|
-
|
1.25
|
0.71
|
0.50
|
1.00
|
0.25
|
|
15
|
-
|
0.96
|
0.96
|
0.83
|
0.48
|
0.33
|
-
|
-
|
|
16
|
0.83
|
-
|
-
|
0.78
|
0.45
|
0.31
|
0.63
|
0.16
|
|
20
|
0.55
|
0.55
|
0.63
|
0.63
|
0.36
|
0.25
|
0.50
|
0.12
|
|
25
|
0.43
|
-
|
-
|
-
|
-
|
-
|
-
|
0.10
|
|
30
|
-
|
0.36
|
0.43
|
0.42
|
0.24
|
0.17
|
-
|
-
|
|
32
|
0.34
|
-
|
-
|
0.39
|
0.22
|
0.16
|
0.31
|
0.08
|
|
40
|
0.26
|
-
|
-
|
0.31
|
0.18
|
0.13
|
0.25
|
0.06
|
|
45
|
-
|
0.18
|
0.24
|
0.28
|
0.16
|
0.11
|
0.22
|
0.06
|
Extracted from The Electricians Guide Fifth Edition
by John Whitfield
Published by EPA Press Click Here to order your Copy.