HP ProLiant BL280c HP BladeSystem c-Class Site Planning Guide - Page 14
Lighting requirements for equipment servicing, Working space for component access
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Lighting requirements for equipment servicing Adequate lighting and utility outlets in a computer room reduce the possibility of accidents and improve efficiency during equipment servicing. The minimum recommended illumination level is 756 lm/m2 (70 foot candles) when the light level is measured at 762 mm (30 in) above the floor. Occupancy-controlled lighting, with manual override switches for use during extended occupancy periods or for servicing, is more efficient and less costly. For example, adequate lighting reduces the chance of connector damage when cables are installed or removed. The HP Rack Light Kit (part number 361589B21) can also be installed at the rear of the rack to ensure adequate lighting is available. Working space for component access The recommended working space for performing maintenance is 1.2 m (4 ft) from either side of, in front of, or behind the server. The work space must permit at least a 90 degree opening of equipment doors or hinged panels. When planning for the working space area, consider whether access to the server will be at the front, the side, or the rear of the component. General site preparation guidelines 14