Nortel 7400 Hardware Installation page 65

Chapter 5 Multiservice Switch 7460 installation 65
Site preparation for a seismic cabinet
Your floor plan must conform to the required spacing shown in "Floor space
requirements for a seismic cabinet" (page 66). 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
degrees (20 in. extension). The front and rear doors have a gate swing of 175
degrees.
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 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.
Multiservice Switch 7400 Hardware Installation, Maintenance, and Upgrade 6.1S2