| Table 5.1 - Maximum earth-fault loop impedance for 240 V socket outlet circuits protected by fuses | |||
|
Fuse rating (A)
|
Maximum earth-fault loop impedance
(Ohms)
|
||
|
|
Cartridge
BS 88 |
Cartridge BS 1361
|
Semi-enclosed BS3036
|
|
5
|
-
|
10.9
|
10.0
|
|
6
|
8.89
|
-
|
-
|
|
10
|
5.33
|
-
|
-
|
|
15
|
-
|
3.43
|
2.67
|
|
20
|
1.85
|
1.78
|
1.85
|
|
30
|
-
|
1.20
|
1.14
|
|
32
|
1.09
|
-
|
-
|
|
40
|
0.86
|
-
|
-
|
|
45
|
-
|
0.60
|
0.62
|
Extracted from The Electricians Guide Fifth Edition
by John Whitfield
Published by EPA Press Click Here to order your Copy.