MIL-HDBK-1004/10
type C or type CDD. Type CDD is recommended because the lead wire connection
is protected longer by the thicker wall of the enlarged ends. Two type CDD
anodes per string provide a current capacity of 2 A x 10 strings = 20 A.
These anodes are spaced as shown in Figure 99.
NOTE: The anodes chosen in this example were chosen to show
the analogy that must be used in designing cathodic
protection. With the advent of newer center connected
tubular anodes, anode type TAFW, 2-3/16 inch by 8
inch, weighing 4.3 pounds each, should be used instead
of CDD anodes.
Table 27
Technical Data - Commonly Used HSCBCI Anodes
ANODE
WEIGHT
ANODE MAX.
AREA
MAX. CURRENT
TYPE
SIZE (in.)
(lb)
DISCHARGE
(ft)
DENSITY
(A)
(A/ft)
TA-FW
2-3/16 x 8
4.3
0.025
0.22
0.1
FW1
1-1/8 OD x 9
1
0.025
0.2
0.1
FC2
1-1/2 x 9
4
0.075
0.3
0.25
G-2
2 OD x 9
5
0.100
0.4
0.25
G-2-1/2
2-1/2 x 9
9
0.20
0.5
0.40
B3,4
1 x 60
12
0.50
1.4
0.36
C
1-1/2 x 60
25
1.00
2.0
0.50
CDD3
1-1/2 x 60
26
1.00
2.0
0.50
M3
2 x 60
60
2.5
2.8
0.9
SM
4-1/2 x 60
20
10.0
5.5
1.8
K-6
6 x 2-1/2
16
0.225
0.5
0.45
K-12
12 x 3-7/16
53
0.80
1.0
0.80
B-30
1 x 30
7
0.25
0.7
0.36
TA-2
2-3/16 x 84
46
6.4
4.0
1.6
1
For elevated fresh water tank.
2
For distributed system in ground trench.
3
Each end enlarged with cored opening for wire.
4
Not more than 2 anodes per assembly.
161
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