Lucent Technologies 1200A 24V ECS Battery Plant J85500E-2
Issue 7 October 1998
Engineering, Planning, and Ordering 3 - 17
Cable and Load
Breaker Sizing
In this section, power cabling for the dc distribution and battery
subsystems is covered, including the following subtopics.
•
Maximum and minimum wire gauge
•
Wire type
•
Crimp lugs
•
Circuit breaker selection
To determine actual wire sizes, the equipment locations, cable
rack and routing systems at the site must be known. Since the
battery plant shares the cabling system with other building
systems, cabling engineering is not completely defined by this
section of the product manual. This section derives the basic dc
power cabling which will be required as part of a complete cable
engineering process. Lucent Technologies offers cabling
engineering services that are separate from battery plant
engineering. Contact your Lucent Technologies Account
Executive for more information on available services.
Wire type RHW or RHH should be used for dc power wiring.
This type of wire is commonly available in American Wire
Gauge (AWG) Stranded (e.g., KS-5482) and in a finer 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 wire sizes that may be readily terminated at the dc
distribution subsystem are listed in Table 3-D. The distribution
allows direct termination of 4/0 wire. H taps should be used for
larger wire size requirements. Table 3-D specifies the
equipment, the terminal lug requirements, the maximum wire
size to be terminated directly without H taps, the terminal lug
center spacing, the crimp tool to use, the required fasteners, and
provisioning information.
Terminal lugs and hardware not provided may be ordered from
Table 3-E.