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APPENDIX C
BONDING & GROUNDING OF BATTERY RACK
INTRODUCTION
1. To insure personnel safety, and equipment protection, operation, and reliability, the battery rack should be connected to the
Common Bonding Network (CBN).
2. Electrical continuity between modules is provided through the use of serrated hardware. Testing has shown that standard sys-
tems are compliant with the GR-1089-CORE, Issue 4, Section 9 requirements of the Bonding and Grounding tests.
GROUNDING KIT INSTALLATION (OPTIONAL)
1. Each kit consists of the following components:
(2) #6 AWG, 12 in. 90°C cables
(4) “C” shaped beam clamps
(4) 1/4-20 x 0.75 in. bolts
(4) 1/4-20 x 1.00 in. bolts
2. Using (1) 1/4-20 x 1.00 in. bolt per beam clamp, connect (1) beam clamp to the I-beam flange and (1) beam clamp to the back
flange of the module (see Figure 1). Be sure to securely tighten the bolts such that the paint is penetrated (see Figure 2).
3. Attach each end of cable assembly to a beam clamp using (1) 1/4-20 x 0.75 in. bolt per end (see Figure 3). Tighten hardware securely.
4. Repeat Steps 2 and 3 for the second horizontal support (I-beam).
CONNECTING TO THE CBN
1. The recommended location for attaching the frame ground is the back “C” channel on the
upper module of the stack (see Figure 4).
2. Once the location is determined, it will be necessary to drill (2) holes for the frame ground conductor/lug (installer supplied).
Note, hole size and spacing will be dependent on the lug.
3. Using a grinder, etc., remove the paint from around the holes drilled in Step 2.
Apply a thin film of NO-OXID grease to the bare metal and attach the frame ground conductor/lug.
Figure 1: Beam Clamp Installation Figure 2: Adequate Paint Penetration Figure 3: Cable Assembly Installation
Figure 4: Recommended Frame
Ground Location