There are two types of labels used that relate to grounding safety: Equipotential (see 
Figure 37), and Earth (see Figure 38). 
 
Fig. 37.   Equipotential Label 
 
Fig. 38.   Earth Ground Label 
Grounding is required for safety and reliable operation of the electrical subsystems. 
Before power is connected to the scanner, a safety ground should be terminated to the 
scanner (see Figure 39). 
 
Fig. 39.   Scanner Ground Termination