TM 5-811-7
paragraph b above. An ammeter cannot be placed in series with the resistance bond because the resistance
would be increased slightly and the current through the bond would be reduced.
c. Bond installation. The installation of cathodic interference resistance bonds will reduce the cathodic
protection current coming onto the protected POL structure from the electrolyte by an amount equal to the
total current flowing through all of the bonds, This total bond current originates from the rectifiers installed
to protect the protected structure (the POL system in this case). The portion of rectified or d.c. current equal
to the total bond current does not contribute to corrosion mitigation of the POL system. Therefore, the
rectified or d.c. current output may have to be increased as bonds are installed to maintain an adequate POL
structure-to-earth potential of -0.85 volt.
F-4
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