| Table 5.4 - Maximum
earth-fault loop impedance for 240 V fixed ---------------- equipment distribution circuits protected by fuses |
|||
|
-
|
Maximum earth-fault loop impedance
|
||
|
Device rating
(A) |
Cartridge
BS 88 |
Cartridge
BS 1361 |
Semi-enclosed
BS 3036 |
|
5
|
-
|
17.1
|
-
|
|
6
|
14.1
|
-
|
-
|
|
10
|
7.74
|
-
|
-
|
|
15
|
-
|
5.22
|
5.58
|
|
16
|
4.36
|
-
|
-
|
|
20
|
3.04
|
2.93
|
4.00
|
|
30
|
-
|
1.92
|
2.76
|
|
32
|
1.92
|
-
|
-
|
|
40
|
1.41
|
-
|
-
|
|
45
|
-
|
1.00
|
1.66
|
|
50
|
1.09
|
-
|
-
|
Extracted from The Electricians Guide Fifth Edition
by John Whitfield
Published by EPA Press Click Here to order your Copy.