Table B-3 Battery System Wire Size - Motorola iDEN Site Controller System Manual

Gen 3 Site Controller System Manual
68P80801E30-A 5/1/2002
Determining battery system wire size
The wire size for the connection between the batteries and the Power Supply
Rack is determined by the required wire length and the maximum allowable
voltage drop. The voltage drop in the loop must be kept to below 200 mV.
The wire selected should be UL-approved and contain a high number of
strands for flexibility.
For a standard configuration, the Power Supply Rack is located directly
adjacent to the batteries with a cable loop length of 20 feet or less, which
requires the use of a 4/0 wire. Table B-3 shows recommended wire sizes for
various loop lengths. Larger wire sizes may be used if the recommended
sizes are not available. The recommended wire sizes are large enough to
allow site expansion to a fully loaded site.
Table B-3 Battery system wire size
Loop length
20 feet
30 feet
45 feet
Selecting battery system lugs
Depending on the wire size used and the manufacturer of the batteries,
different wire lugs are crimped onto the power cable ends. After the wire
size has been determined from Table B-3, verify the manufacturer of the
Batteries (Dynasty or Absolyte).
Two different battery systems are offered with the system. The Dynasty
system is a low to medium capacity, field expandable system supplied for
smaller sites or sites with minimal backup hour requirements. This system is
custom designed to Motorola specifications. The Dynasty system is
manufactured by Johnson Controls:
Johnson Controls
Specialty Battery Division
900 East Keefe Avenue
P.O. Box 591
Milwaukee, WI 53212
Phone: 414 967-6500
The Absolyte IIP battery system is a heavy duty, high capacity battery
system. The Absolyte IIP battery system is manufactured by GNB
Technologies:
Wire size
4/0 (or 250 MCM)
350 MCM
500 MCM
Appendix B Parts & Suppliers
B-11