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This image shows electrical equipment safety labeling and specifications for an I-Line Panelboard manufactured by Square D (model HCRU). The panelboard specifications indicate it has a maximum amperage of 1000 amps and operates at 208Y/120 VAC with 3 phases and 4 wires. The image includes a prominent bilingual (English/Spanish) danger warning label describing electrical shock, explosion, and arc flash hazards, along with required safety protocols including proper PPE usage per NFPA 70E standards. The warning label emphasizes that only qualified electrical personnel may service the equipment and specifies requirements for power disconnection, voltage sensing, and blank filler installation. This equipment appears to be part of the electrical infrastructure that would be relevant to the HVAC and facility upgrade project at the Portland ME Air Traffic Control Tower, particularly regarding the electrical systems that will support new mechanical equipment installation.

The "MDPE" marking visible at the bottom of the image likely indicates a Main Distribution Panel Electric, which would be a critical component in the building's electrical distribution system that would need to be considered during the HVAC upgrades and installation of new equipment specified in the contract opportunity.