Redundant Powers systems offer multiple challenges. Every consumer’s needs are somewhat different, consequently each system is different. Procuring the right uninterruptible power source (UPS), generator, transfer mechanisms, and bypass equipment requires diligent attention. Coordinating shut-downs of new or existing systems requires complete working knowledge to avoid any activity that can cause system failure or data loss. Finally, these systems are designed to provide continuous power. Concerns for our employees’ safety are obvious. No “hot work” if at all possible, is our mantra. Checking ways to isolate portions of the system for maintenance is our first choice. If the only option is working on a system hot, we complete our “Energized Electrical Work Permit” and plan the work and all its specific requirements. RMJ has installed many redundant power systems ranging in size from a few volt amps/ watts to several thousand volt amps and a few mega watts. Our experience makes this one of our favorite types of work.