Alpha Technologies Cordex 125-4.4kW - Manual (Page 22)

Argus Technologies Ltd. 010-589-C0 Rev A WC
Printed in Canada. © 2007 Argus Technologies Ltd. ARGUS and CORDEX are trademarks of Argus Technologies Ltd. All Rights Reserved. Page 8 of 16
5.6 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.
5.7 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).
5.7.1 Cable
Terminate cable leads with appropriate crimp lugs for 3/8” holes on 1” centers.
Secure the positive and negative to the shelf output post of the correct polarity; i.e., +Vcable to +Vpost. Ensure
the washers are on the bolts in the same order in which they were shipped from the factory. Tighten the bolts as
per Customer Connections drawing at the rear of this manual.
5.7.2 Bus Bar
Bus bar adapters may be factory-installed, for the option selected, to easily accommodate direct connections to
customers’ vertical bus bars.
Secure the positive and negative to the shelf output post of the correct polarity; i.e., +Vcable to +Vpost. Ensure
the washers are on the bolts in the same order in which they were shipped from the factory. Tighten the bolts as
per Customer Connections drawing at the rear of this manual.