Where can electrical noise be reduced for electronic equipment?

To understand why a non-metallic raceway can help reduce electrical noise for electronic equipment, it's important to consider the properties of materials and their impact on electromagnetic interference (EMI).

Non-metallic raceways, such as PVC or other insulating materials, provide electrical isolation from surrounding conductive materials. This isolation minimizes the coupling of electromagnetic interference and reduces the likelihood that external noise will affect the signals within the raceway. Non-metallic raceways are effective at preventing EMI due to their lack of conductive properties, making them a suitable choice when the goal is to protect sensitive electronic equipment from electrical noise.

In contrast, while a metal raceway effectively shields certain types of interference, it can also act as an antenna for noise, potentially transmitting interference rather than eliminating it. Fiber optic cables are excellent for reducing electrical noise since they transmit data using light rather than electrical signals, but they are not applicable to the question since they represent a different medium rather than a raceway. Grounding to the earth serves to dissipate stray currents and reduce noise but does not specifically address where electrical noise can be reduced within a physical run of conductors, particularly in the context of raceways.

Thus, a non-metallic raceway is the best option in this scenario for effectively