030-713-C0 Rev A WC
Page 12 of 23
6.6 Calculating
Output
Wire Size Requirements
Wire size is calculated by first determining the appropriate maximum voltage drop requirement. Using the formula
below calculate the CMA wire size requirement. Determine the size and number of conductors required to satisfy
the CMA requirement.
CMA = (A x LF x K) / AVD, where:
CMA = Cross section of wire in circular MIL area
A = Ultimate drain in amps
LF = Conductor loop feet
K = 11.1 constant factor for commercial (TW type) copper wire
AVD = Allowable voltage drop
Check again that the ampacity rating of the cable meets the requirement for the installation application. Consult
local electrical codes (NEC, CEC, etc.) for guidelines. If required, increase the size of the cable to meet the code.
6.7
DC Output Connections
WARNING
Leave cables or bus bars disconnected at battery and verify output polarity using a voltmeter.
Make battery connections only after all other wiring is completed.
DC output wire shall be UL approved XHHW or RHH/RHW (for Canadian users, RW90 Type). Control and sense
wires shall be UL approved Style 1015 (for Canadian users, TEW type).
Figure 4–Rear perspective view of DC output
DC output cables are
connected through the
rear of the shelf.
The common output leg
of the rectifier system
should be connected to
ground. This is typically
done at the load common
termination point.
Older style
shelves may have
side access for
DC output.
Summary of Contents for ALPHA OUTBACK ENERGY Cordex 48-1kW
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