When routing power cables, at what degree angle should they cross other cables when possible?

When routing power cables, at what degree angle should they cross other cables when possible?

• A. 60 degrees
• B. 45 degrees
• C. 90 degrees
• D. 120 degrees

Answer: (C)

Crossing at a right angle minimizes electromagnetic interference between power and other cables. When cables cross perpendicularly, the overlapping length for magnetic coupling is minimized, so any induced noise is greatly reduced. Running them at other angles or parallel to each other increases the potential for interference. So, whenever possible, cross power cables with other cables at a perpendicular (90-degree) angle, and if you can’t avoid crossing, maximize the separation.

Crossing at a right angle minimizes electromagnetic interference between power and other cables. When cables cross perpendicularly, the overlapping length for magnetic coupling is minimized, so any induced noise is greatly reduced. Running them at other angles or parallel to each other increases the potential for interference. So, whenever possible, cross power cables with other cables at a perpendicular (90-degree) angle, and if you can’t avoid crossing, maximize the separation.