To minimize interference from sources of EMI, cables should cross each other at what angle?

When it comes to minimizing interference from sources of electromagnetic interference (EMI), the optimal angle for cables to cross each other is at 90-degree angles. This configuration effectively reduces the potential for crosstalk and signal degradation that can occur when cables are laid parallel to one another for extended lengths. By crossing at a right angle, the exposure of the cables to interference is minimized, as the fields from each cable do not interact as significantly compared to sharper angles.

Crossing cables at angles other than 90 degrees, such as those proposed by the other options, can increase the risk of EMI impacting the signal integrity. For instance, a 45-degree angle can still allow some degree of interaction between the cables, leading to potential interference issues. Similarly, crossing at 30 or 180 degrees (which is essentially parallel) presents an even higher risk for EMI affecting performance, as cables may run adjacent to each other, allowing for more substantial interference.

Therefore, maintaining a 90-degree crossing point provides the greatest protection against interference, ensuring optimal performance for limited-energy cabling systems.