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ETL 1110-9-10(FR)
5 Jan 91
N
=
14.5
1
N
=
14.5; use 15 rod segments (4 ft.
long)
7)
Calculate the radius of the main anode circle (AR),
using equation 2-4:
DxN
AR '
(eq 2-4)
2 (A % N)
Where:
D=
56 ft (Tank diameter, from item 2 of
paragraph 2-7a)
N
=
10 anode strings (assumed: it is
necessary to assume a number of
anode strings since there are two
unknowns in this equation.
AR =
56 ft x 10
2 (3.1416 + 10)
AR =
560 ft
26.28
AR =
21.3 ft; use 22 ft for the main
anode circle radius
85
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