Ametek Sorensen SGI Series - 2.5 Wire Selection

Sorensen SGI Series Installation
M550221-01 Rev U 2-7
2.5 Wire Selection
Care must be taken to properly size all conductors for the input and output of
the power supply. This section provides guidance in the selection of wire size.
CAUTION!
Cables with Class B or C stranding should be used. Fine-stranded
(flexible) cables should not be used unless crimp-on lugs or ferrules
are used that are approved for fine-stranded cables.
2.5.1 Wire Size
The tables below will assist in determining the appropriate wire size for both
the input and output connections. Table 2–8 gives minimum recommended
wire size; these recommendations are for copper wire only. This table is
derived from the National Electrical Code, and is for reference only. Local laws
and conditions may have different requirements. For higher ratings, wires can
be paralleled; refer to the National Electrical Code for guidelines.
Size
Temperature Rating of Copper Conductor
AWG
60°C
75°C
85°C
90°C
Types: RUW,
T, TW, UF
Types: FEPW,
RHW, RH, RUH,
THW, THWN,
XHHW, USE, ZW
Types: V, MI
Types: TA, TBS,
SA, AVB, SIS, FEP,
FEPB, RHH, THHN,
XHHW
Current Rating, A(RMS)
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 2–8. Minimum Wire Size