3-17
Figure 3-16.—Table of correct readings.
With the switch in position 1 and the voltmeter connected between ground and terminal 1, the
voltmeter should indicate no voltage (OV). When the voltmeter is connected to terminal 2, the voltmeter
should indicate the source voltage. With the voltmeter connected to terminal 3, the source voltage should
also be indicated. The table in figure 3-16(C) will show you the correct readings with the switch in
position 2 or 3.
REPLACEMENT OF SWITCHES
When a switch is faulty, it must be replaced. The technical manual for the equipment will specify the
exact replacement switch. If it is necessary to use a substitute switch, the following guidelines should be
used. The substitute switch must have all of the following characteristics.
At least the same number of poles.
At least the same number of throws.
The same number of breaks.
At least the same number of positions.
