Which of the following is NOT recommended for lighting track installation?

Lighting track installation in dry locations is widely accepted and recommended. This is because dry locations allow for safety and optimal performance of the lighting fixtures, ensuring that the electrical components do not face moisture-related issues that can lead to short circuits or corrosion.

In contrast, the other options involve practices that pose risks or do not align with standard installation guidelines. For instance, installation in damp locations can create safety hazards due to moisture exposure, which can damage electrical components and lead to electrical shocks. Concealed installation can limit access for maintenance and troubleshooting, and installing track lighting through walls or partitions can complicate wiring and safety compliance, specifically regarding heat dissipation and accessibility. Therefore, dry locations are appropriate for track lighting installations while the other options should be avoided.