Exide Technologies Section 92.30 - Manual (Page 8)

Determine the number of units to be placed on each row. If a row of units does not fill the entire rack
length, fill the remaining space with foam cell spacers in seismic installations.
SECTION 7 - ELECTRICAL INSTALLATION CONSIDERATIONS
7.0 CONNECTING CABLES: BATTERY SYSTEM TO OPERATING EQUIPMENT
Battery performance is based on the output at the battery terminals. Therefore, the shortest electrical
connections between the battery system and the operating equipment should be used for maximum
total system performance. A terminal plate kit should be utilized when connecting multiple cables to a
battery terminal post.
DO NOT SELECT CABLE SIZE BASED ON CURRENT CARRYING CAPACITY ONLY. Cable size
selection should provide the lowest voltage drop possible between the battery system and operating
equipment. Excessive voltage drop will reduce the desired support time of the battery system.
7.1 PARALLELING
Where it is necessary to connect battery systems in parallel to obtain sufficient capacity, cable
connections from the bus/load to each of the parallel strings is preferred rather than inter-string
paralleling. The maximum number of parallel strings recommended by GNB Industrial Power in high
rate applications is 4. High Rate applications are defined as those with loads that would discharge
the battery in 60 minutes or less.
Cables should be sized to minimize voltage drop, and for proper current carrying capability. They should be
as short as possible. Care should be taken to ensure the overall resistance of the connection between
batteries and equipment bus are consistent between strings.
7.2 CONNECTION PREPARATION
Gently clean contact surfaces only by using a brass suede brush or 3M Scotch Brite scouring pad,
being careful not to remove lead plating from inter-unit connectors. Immediately after contact areas
are cleaned, apply a thin coating of NO-OX-ID grease to these surfaces only.
7.3 CONNECTION TORQUEING
After cleaning contact surfaces, install all connectors hand tight to allow for final alignment of units.
Once final alignment is made, all connections should be torqued to the value shown on the battery
Complete connection of units by installing the inter-tier cables and terminal plates (when required).
Caution
, do not make connections to the load at this time.
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