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ETL 1110-9-10(FR)
5 Jan 91
Table 3--4. Shape functions (K) for impressed current cathodic
protection anodes where L is effective anode/backfill length and
d is anode/backfill diameter.
L/d
K
L/d
K
5
0.0140
20
0.0213
6
0.0150
25
0.0224
7
0.0158
30
0.0234
8
0.0165
35
0.0242
9
0.0171
40
0.0249
10
0.0177
45
0.0255
12
0.0186
50
0.0261
14
0.0194
55
0.0266
16
0.0201
60
0.0270
18
0.0207
Table 3-5. Anode paralleling factors (P) for various numbers of
anodes (N) installed in parallel.
N
P
N
P
2
0.00261
14
0.00168
3
0.00289
16
0.00155
4
0.00283
18
0.00145
5
0.00268
20
0.00135
6
0.00252
22
0.00128
7
0.00237
24
0.00121
8
0.00224
26
0.00114
9
0.00212
28
0.00109
10
0.00201
30
0.00104
12
0.00182
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