Wire Anode Characteristics
Wire Anode Dimensions
Nom-Wire
Size |
Diameter
Tolerance |
Titanium |
Copper |
Active Surface Area |
Weight |
| |
mm |
inches |
%
by Wt. |
%
by Vol. |
%
by Wt. |
%
by Vol. |
ft²/ft
of length |
m²/m
of length |
lbs/ft |
g/m |
| 1.5 |
+0.15
-0.00 |
+0.007
-0.000 |
31 |
47 |
69 |
53 |
0.0155 |
0.0047 |
0.008 |
12.2 |
| 3.0 |
+0.28
-0.00 |
+0.010
-0.000 |
15 |
25 |
85 |
75 |
0.0309 |
0.0094 |
0.037 |
66.4 |
Electrical Properties Of Wire Anode
Wire Size (mm)
|
1.5 |
3.0 |
| Electrical Resistivity (ohm/m at 25° C) |
0.0188 |
0.0034 |
| Electrical Resistivity (ohm/m at 70° C) |
0.0221 |
0.0040 |
| Maximum Wire amperage at 25° C |
21 |
36 |
| Maximum Wire amperage at 70° C |
7 |
12 |
Resistivity Versus Length
Proper current distribution is an important factor in the design and proper
use of an anode wore for each application. The graphs of Electrolyte Resistivity
versus Maximum Wire Length are shown for selected voltage drops down the line.
The voltage drop values represent the percentage decrease in actual driving
voltage for the beginning to the end of a particular anode system.
For example. if a wire voltage drop of 10% or less is desired for
proper current distribution in 1000 ohm-cm water, anode segments 45
feet should not be exceeded between electrical connections to a
header cable with the 1.5 mm diameter wire. By comparison, use of
the 3.0 mm diameter wire will permit the use of 110 foot segments,
while still allowing the desired 10% voltage drop.
As with all electrical conductors, the operating temperature of
the wire effects the resistance. The change in resistivity also
changes the maximum ampacity of the wire.
