Nortel 7400 Hardware Installation page 80

80 Chapter 7 Multiservice Switch 7480 installation
Site preparation for a seismic cabinet
NN10600-175 6.1S2
Your floor plan must conform to the required spacing shown in "Floor space
requirements for a seismic cabinet" (page 81). You can install termination
panels in the same cabinet as the chassis. Or, you can install termination
panels in a separate cabinet or rack.
Position each cabinet to allow you to open both the front and rear doors 90°
(20 in. extension). The front and rear doors have a gate swing of 175°.
Cabinets that contain a single device mounted in the top half must be
anchored to the floor. To meet NEBS Zone 4 seismic requirements, you must
anchor the cabinet to the floor using the equipment in one of the seismic
anchoring kits. You cannot anchor a seismic cabinet for seismic protection on
a raised floor.
For ac installations, the power cord attachment to each device must be within
1.5 m (5 ft) of the electrical outlet. Do not use extension cords. For dc
installations, the distance from the power cord attachment to each device must
be correct for its wire gauge and voltage drop. See dc power input and wiring
regulations in NN10600-170 Nortel Networks Multiservice Switch 7400
Hardware Description.