and the substation protector may reveal a broken lead. If no broken lead is found, test at the end of the
line. If the open is located back toward the connecting box, go back over the line and test at reasonably
spaced intervals until the open is located between two test points. Continue to test at intervals until the
fault is located between two adjacent poles. If the leads are both in the air, the fault is probably a poorly
made splice. If the pole line carries another working common battery circuit, connect one lead of the
test set to one side of this circuit, and connect the spare lead to one side of the line under test. If a click
or dial tone is heard, that lead is good. If no click or dial tone is heard, move the test set lead to the other
side of the working line and repeat the test. If a click or dial tone is heard, the side of the circuit under
test is good. Secure the faulty lead toward the substation, and cut it toward the connecting box far
enough away from the pole tie to permit a sleeve splice later. Examine the lead, locate the open, and
make the necessary repairs.
(3) If the open is in an insulated paired wire, proceed as in (2) to the point where the fault is
located between two adjacent poles. Because there is no advantage in determining whether the open is
in the ring side or the tip side of the line, cut the wire toward the connecting box, and test at intervals
along the line back toward the connecting box until the fault is located. Repair the open to restore
service, and then inspect the line; the conditions that caused the interruption in service should be
(4) If the open is located in a cable pair, consult the cable records for authority, and transfer
the circuit to a good spare pair.
c. Testing for and locating Open Ground Lead.
(1) To determine whether the ground wire of the substation protector is open, connect the test
receiver across the line at the protector.
(2) If a click is heard, the line is good at this point. With the test pick connected to the ring
conductor, tap the ground binding post with the other test clip. A click, heard each time the connection
is made and broken, indicates a good ground lead; lack of a click indicates an open ground lead.
(3) A visual inspection of the ground wire and connections will usually reveal the source of
d. Locating opens in Drop and Inside Wires.