3 Electrical Installation                                                                                                                      
 
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cable
cable
< 30 cm
cable
cable
≥ 30 cm
90°
Interference 
cable
Sensitive 
cable
Figure 3-3 Routing of interfering cables and sensitive cables
2)  Route dierent signal cables separately and isolate dierent types of signals 
with the equipotential signal. When routing cables of same signal type, lay the 
equipotential signal cables at the outer layer, and consider the equipotential signal 
arrangement in the middle. The following gure shows an example.
Standard cable
Bad belt shape
Two pairs of different cables
Good belt shape
Digital signal
Analog signal pair
Equipotential wire
Figure 3-4 Routing of dierent types of signal cables