a. Examine the following illustration, and determine
which of the three installations is wired incorrectly,
and why.
b. Of the two remaining installations, which of them
do you think would be preferred over the other, and
why?
Panel instrument
Panel instrument
Chassis or
earth ground
Panel instrument
Chassis or
earth ground
Field instrument
Single-pair cable
Chassis or
earth ground
Field instrument
Single-pair cable
+
0-
Chassis or
earth ground
Field instrument
Single-pair cable
-
93
94