Alcatel OS6855-24 User Guide - Page 95

Mounting OS6855-14/P14 and OS6855-U10 Switches General Installation Recommendations Recommended Clearances Always allow adequate clearance at the front, rear, top, and sides of the switch. The following table shows the recommended minimum clearances for adequate chassis cooling and access to cabling and components at the front and rear of the chassis. Location Top Bottom Sides Rear Front OS6855-14/P14 0.875 inches (1/2 RU) for switches operating in an ambient room temperature of 60°C or less. 3.5 inches (2 RU) for switches operating in an ambient room temperature of 70°C (maximum allowable). No minimum clearance required. However, be sure that the bottom of the chassis is not in direct contact with any equipment below. 2 inches 6 inches (see note below) 6 inches (see note below) OS6855-U10 0.875 inches (1/2 RU) for switches operating in an ambient room temperature of 60°C or less. 3.5 inches (2 RU) for switches operating in an ambient room temperature of 70°C (maximum allowable). No minimum clearance required. However, be sure that the bottom of the chassis is not in direct contact with any equipment below. 2 inches 6 inches (see note below) 6 inches (see note below) Note. Clearance recommendations at the front and rear of chassis are for access to cabling and components only and are not intended as a specific air flow requirement. Mechanical Loading Mounting of the equipment in the rack should be such that a hazardous condition is not achieved due to uneven mechanical loading. Circuit Overloading Consideration should be given to the connection of the equipment to the supply circuit and the effect that overloading of the circuit might have on overcurrent protection and supply wiring. Appropriate consideration of equipment nameplate ratings should be used when addressing this concern. Reliable Earthing Reliable earthing of rack-mount equipment should be maintained. Particular attention should be given to supply connections other than direct connections to the branch circuit (e.g. use of power strips). OmniSwitch 6855 Series Hardware Users Guide September 2011 page 4-3