Cisco 3845 Hardware Guide - Page 45

Grounding the Router You must connect the router chassis to a reliable earth ground. The ground wire must be installed in accordance with local electrical safety standards. • For NEBS-compliant grounding, use size AWG 6 (13 mm2) wire and the two-hole barrel lug provided in the router accessory kit. • For NEC-compliant grounding, use size AWG 14 (2 mm2) or larger wire and an appropriate user-supplied ring terminal. • For EN/IEC 60950-compliant grounding, use size AWG 18 (1 mm2) or larger wire and an appropriate user-supplied ring terminal. To connect the router to a reliable earth ground, follow these steps: Step 1 Step 2 Step 3 Step 4 Strip one end of the ground wire to the length required for the two-hole barrel lug or terminal. • For the NEBS two-hole barrel lug, approximately 0.75 in. (20 mm) • For a user-provided ring terminal, as required Crimp the ground wire to the two-hole barrel lug or ring terminal, using a crimping tool of the appropriate size. Attach the two-hole barrel lug or ring terminal to the router chassis as shown in Figure 8 , Figure 9, Figure 10, or Figure 11. For a two-hole barrel lug, use the two screws with captive locking washers provided. For a ring terminal, use one of the screws provided. Tighten the screws to a torque of 8 to 10 in-lb (0.9 to 1.1 N-m). Connect the other end of the ground wire to a suitable grounding point at your site. Figure 8 NEBS-Compliant Two-Hole Barrel Lug Ground Connection on Cisco 3825 Router NE36SMWD-- 35x GE1 1B0a/s1e0-0T/x1000 17x 35x 17x 34x 16x 33x 15x 32x 14x 31x 13x 30x 12x FastEthernet Ports 29x 11x 28x 10x 27x 9x 26x 8x 25x 17 24x 6x 18x 23x 5x 22x 4x 21x 3x 20x 2x 19x 1x 0x 18x 0x Ext Pwr -48V GE0 11B00a/0s10e0-0T/x EN 117015 Ground lug attachment OL-5969-01 Installing Cisco 3800 Series Routers in an Equipment Rack 15