C04 - 7 - Pictures.pdf

This document is a photographic reference guide for electrical switchgear and power equipment at the San Bernardino National Forest Supervisors' Office, specifically documenting damage to a Southern California Edison (SCE) substation and associated Forest Service infrastructure.

The document contains 14 pages of photographs depicting the electrical system configuration and damage at the site. Key infrastructure shown includes the SCE substation with transmission structures, the connection point between SCE's transformer secondary and Forest Service switchgear where damage occurred, internal views of damaged busbars with melted and peeling insulation, secondary feeder cables connecting SCE equipment to Forest Service main entrance busbars, multiple switchgear compartments showing control equipment and distribution systems, a secondary distribution transformer with generator tie-in configuration, and a standby generator unit. The photographs reveal evidence of electrical arcing or fault damage with charred and degraded insulation materials, discoloration on internal busbars, and what appears to be possible asbestos insulation on some cable components. The switchgear compartments show metering equipment, circuit protection devices, and high-voltage warning labels. The document serves as visual documentation of site conditions and damage extent, likely for repair specification, insurance, or investigative purposes related to electrical system failure at this federal facility.