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Specifications: Electrical Specification
Symmetra MW 1000 kW 480 V Installation - 990-4112E 33
Size Temperature Rating of Cables (See Table 310-13) Size
AWG or
kcmil
60
o
C
(140
o
F)
75
o
C
(167
o
F)
90
o
C
(194
o
F)
60
o
C
(140
o
F)
75
o
C
(167
o
F)
90
o
C
(194
o
F)
AWG or
kcmil
Types
TW,UF
Types
FEPW,RH,RH
W,THHW,
THW,THWN,
XHHW,
USE,ZW
Types
TBS,SA,SIS,FEP,
FEPB,MI,RHH,
RHW-2,THHN,
THHW,THW-2,
THWN-2,USE-2,
XHH,XHHW,XH
HW-2,ZW-2
Types
TW,UF
Types
RH,RHW,TH
HW,THW,
THWN,
XHHW,USE
Types
TBS,SA,SIS,TH
HN,THHW,TH
W-2,THWN-2,
RHH,RHW-2,
USE-2,XHH,
XHHW,
XHHW-2,ZW-2
Copper Aluminium or Copper-Clad Aluminium
18
16
14*
12*
10*
8
-
-
20
25
30
40
-
-
20
25
35
50
14
18
25
30
40
55
-
-
-
20
25
30
-
-
-
20
30
40
-
-
-
25
35
45
-
-
-
12*
10*
8
6
4
3
2
1
55
70
85
95
110
65
85
100
115
130
75
95
110
130
150
40
55
65
75
85
50
65
75
90
100
60
75
85
100
115
6
4
3
2
1
1/0
2/0
3/0
4/0
125
145
165
195
150
175
200
230
170
195
225
260
100
115
130
150
120
135
155
180
135
150
175
205
1/0
2/0
3/0
4/0
250
300
350
400
500
215
240
260
280
320
255
285
310
335
380
290
320
350
380
430
170
190
210
225
260
205
230
250
270
310
230
255
280
305
350
250
300
350
400
500
600
700
750
800
900
355
285
400
410
435
420
460
475
490
520
475
520
535
555
585
285
310
320
330
355
340
375
385
395
425
385
420
435
450
480
600
700
750
800
900
1000
1250
1500
1750
2000
455
495
520
545
560
545
590
625
650
665
615
665
705
735
750
375
405
435
455
470
445
485
520
545
560
500
545
585
615
630
1000
1250
1500
1750
2000
CORRECTION FACTORS
Ambient
Temp. (
o
C)
For ambient temperatures other than 30
o
C (86
o
F), multiply the allowable Ampacities shown above by
the appropriate factor shown below
Ambient
Temp. (
o
F)
21-25
26-30
31-35
36-40
41-45
46-50
51-55
56-60
61-70
71-80
1.08
1.00
0.91
0.82
0.71
0.58
0.41
-
-
-
1.05
1.00
0.94
0.88
0.82
0.75
0.67
0.58
0.33
-
1.04
1.00
0.96
0.91
0.87
0.82
0.76
0.71
0.58
0.41
1.08
1.00
0.91
0.82
0.71
0.58
0.41
-
-
-
1.05
1.00
0.94
0.88
0.82
0.75
0.67
0.58
0.33
-
1.04
1.00
0.96
0.91
0.87
0.82
0.76
0.71
0.58
0.41
70-77
78-86
87-95
96-104
105-113
114-122
123-131
132-140
141-158
159-176
Reprinted with permission from NFPA 70-2005, National Electrical Code®, Copyright © 2004, National Fire Protection Association,
Quincy, MA 02169. This reprinted material is not the complete and official position of the NFPA on the referenced subject, which is
represented only by the standard in its entirety.