We follow a tight through-line: two neighboring tenant floors experience the same outage but diverge after different power decisions. An anonymized micro-case compares outcomes one floor endured ~4 hours of downtime with lost services and tenant disruption; the other reduced downtime to under 30 minutes after modest UPS sizing, clear ownership boundaries, and a documented testing cadence. Early in the episode listeners hear a three-item audible checklist they can use immediately: (1) define and agree critical loads, (2) match redundancy to downtime tolerance, (3) require testable handover documentation. The main segment diagnoses common root causes undermetering, mixed tenant loads, ambiguous metering/ownership and compares backup strategies (tenant vs building UPS, generator sizing philosophy, centralized vs distributed batteries) using decision heuristics rather than product recommendations. The close gives operational practices, repeatable questions for design reviews, and points listeners to the show's resource hub for a downloadable checklist. Listeners are reminded to consult licensed electricians and local code officials for implementation or compliance.