Argantix KDC 100-100, User Manual

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User Manual
KDC Series II DC Power Supplies 17
3.4 Wire Sizing and Lug Size
The DC output is available from a set of copper bus bars, one for the positive terminal, out for the
negative terminal. Each bus bar has two screw studs, (Penn Engineering, HFHB-0518-24, see
www.pennfast.com ) to which a set of two nuts and lock washers are attached. The
recommended ring-lug size that mates with these 5/16-18 thread studs for connecting output
wiring is 5/16” (standard) or M8 (metric). Crimp ring lugs are generally available from Tyco/AMP
and catalog vendors like Mouser, Digikey etc. The wire gauge and ring-lug crimp size must be
matched. See paragraph 3.5 for AC input wire lug size.
Figure 3-2: DC Output bus bar studs.
Care must be taken to properly size all conductors for the input and output of the power supply.
Table 3-7 provides guidelines for minimum recommended wire sizes for the AC input and DC
output wires. This table is derived from the National Electrical Code and is for reference only.
Local laws and conditions may have different requirements. The table is for copper wire only. The
use of Aluminum wiring is not recommended.
Size Temperature Rating of Copper Conductor
60 C 75 C 85 C 90 C
Types Types Types Types
AWG
MCM RUW, T, TW UF FEPW, MR, RHW,
RUH, THW, THWN,
XHHW, USE, ZW V, MI TA, TBS, SA, AVB,
SIS, FEP, FEPB,
RHH, THHN, XHHW
Current Rating
14 20 20 25 25
12 25 25 30 30
10 30 35 40 40
8 40 50 55 55
6 55 65 70 75
4 70 85 95 95
3 85 100 110 110
2 95 115 125 130
1 110 130 145 150
0 125 150 165 170
00 145 175 190 195
000 165 200 215 225
0000 195 230 250 260
Table 3-7: Minimum Wire Size Table
For higher ratings wires can be paralleled or refer to the applicable National Electrical Code.