Lucent Technologies Lineage
®
2000 ECS Battery Plant H569-403
3 - 18 Engineering, Planning, and Ordering
Issue 4 February 1997
stranded welding type (e.g. KS-20921). Flexible or Welding
Wire is slightly larger than AWG stranded wire of the same
gauge, which may affect the selection of crimp lugs. For
example, different crimp lugs are required for AWG and Weld
wire of the same gauge, for 1/0 gauge and larger. Flexible power
wire (e.g., KS-20921) should be used for sizes 1/0 and larger in
applications requiring tight bends, such as small battery plants in
confined locations.
The terminal lugs that may readily be attached at the dc
distribution subsystem are listed in Tables 3-D and 3-E.
A wide range of circuit breakers and fuses is available for dc
distribution overcurrent protection. The ratings of these circuit
breakers are from 10-100 and the ratings of the fuses are from
1-30 amperes. The breaker or fuse rating for a given circuit is
selected by the criteria covered in paragraph “Overcurrent
Protection.”
The lengths of all load and battery conductors must be known
before proceeding with this section. Use the following steps to
record the wire and breaker/fuse sizes for each load feeder in
Table 3-F. Use additional sheets as needed.
Step A: Copy List 2 drains for each load feeder from Table 3-B
to Table 3-F.
Step B: Calculate the minimum wire size that meets the
ampacity requirement based on the List 2 drain for each load
feeder.
Step C: List the wire sizes based on ampacity in Table 3-F.
Step D: Calculate the minimum wire size for each load feeder in
Table 3-B to meet the voltage drop requirements outlined in
paragraph “Calculating Voltage Drop.”
Step E: List the sizes based on voltage drop in Table 3-F.
Step F: Indicate the larger size for each load feeder in the
column marked “Selected Wire Gauge.”
Step G: Fill in the circuit breaker rating (10, 20, 30, 45 or 60
amperes) in Table 3-F for each feeder.
