To prevent tampering with control enclosures, which placement approach is recommended?

• A. Enclosures should be placed in areas with no access for anyone.
• B. Enclosures should be placed in accessible locations for authorized personnel.
• C. Enclosures should be placed outdoors in unfenced areas.
• D. Enclosures should be painted to blend in.

Answer: (C)

Preventing tampering hinges on making interference obvious and difficult to carry out unnoticed, while still allowing authorized personnel to perform necessary maintenance. Placing control enclosures outdoors in an open, unfenced area increases visibility to workers, passersby, and any surveillance in the vicinity, which acts as a strong deterrent against tampering. The idea is that tampering would likely be detected quickly, reducing the incentive to interfere with the enclosure. Proper security measures like locks, cameras, and restricted access for maintenance should still be in place to protect the equipment without sacrificing this deterrent effect.

The other approaches fail to balance practicality and deterrence. If no one can access the enclosure at all, maintenance becomes impractical. Keeping enclosures in highly accessible locations for authorized personnel improves upkeep but can reduce deterrence by making tampering easier to conceal or go unnoticed if not paired with monitoring. Painting the enclosure to blend in makes tampering harder to detect, which is counterproductive to preventing interference.