Given a 25 hp, three-phase, 230-volt, squirrel cage induction motor. The ambient temperature of the place of installation is 40°C. Use TW wires
Given a 25 hp, three-phase, 230-volt, squirrel cage induction motor. The ambient temperature of the place of installation is 40°C. Use TW wires
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter7: Symmetrical Faults
Section: Chapter Questions
Problem 7.3MCQ: The amplitude of the sinusoidal symmetrical ac component of the three-phase short-circuit current of...
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Given a 25 hp, three-phase, 230-volt, squirrel cage induction motor. The ambient temperature of the place of
installation is 40°C. Use TW wires
![Table Al – Allowable Ampacities of Insulated Conductors Rated 0 through 2,000 Volts,
60°C Through 90°C not more than Three Current-Carrying Conductors in Raceways,
Cable, Based on Ambient Temperature of 30°C
Temperature Rating of Conductor
90°C
60°C
75°C
Турes
FEPW,
RH, RHW,
THHW,
THW,
THWN,
XHHW,
USE, ZW
60°C
75°C
90°C
Турез
TBS, SA, SIS, FEP,
FЕPB, M, RHH,
ZW-2, RHW-2,
THHN, THHW,
THW-2, THWN-2,
XHHW, XHHW-2
Турes
RH, RHW,
THHW,
THW,
THWN,
XHHW,
USE
Турes
TBS, SA, SIS,
THHN, THHW,
THW_2, THWN-
2, USE-2, XHH,
XHHW, ZW-2,
XHHW-2
Conductor
Size
[mm']
Турes
TW,
Турes
TW,
UF
UF
ALUMINUM or COPPER-
СОРPER
CLAD ALUMINUM
2.0
20
20
25
3.5
25
25
30
20
20
25
5.5
30
35
40
25
30
35
8.0
40
50
55
30
40
45
14
55
65
70
40
50
65
22
70
85
90
55
65
80
30
90
110
115
65
80
90
38
100
125
130
75
90
105
50
120
145
150
95
110
125
60
135
160
170
100
120
135
80
160
195
205
120
145
165
185
210
100
220
140
190
225
265
295
170
125
255
165
200
225
150
240
280
185
225
250
200
280
330
355
220
265
300
250
315
375
400
255
305
345
325
370
435
470
305
365
410
400
405
485
515
335
405
460
00
445
540
580
370
440
495
CORRECTIONFACTOR
Ambient
For ambient temperatures other than 30°C, multiply the allowable
ampacities showWn above by the appropriate factor shown below
1.05
Теmp. ("C)
21 - 25
26 - 30
31- 35
36- 40
41 -45
1.08
1.04
1.08
1.05
1.04
1.00
1.00
1.00
1.00
1.00
1.00
0.91
0.94
0.96
0.91
0.94
0.96
0.82
0.88
0.91
0.82
0.88
0.91
0.71
0.82
0.75
0.67
0.82
0.87
0.71
0.87
0.75
0.67
0.58
0.33
46 – 50
0.58
0.82
0.58
0.82
0.76
0.41
0.76
0.71
51-55
0.41
56 - 60
0.71
0.58
61 - 70
71- 80
Source: Philippine Electrical Code 2000 Part 1, Vol. 1
0.58
0.33
0.58
0.41
0.41](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc884b76e-62ee-4c1f-a3ae-7a051008f1ab%2F1a4018f2-1243-405a-9b00-ee41316f7f21%2F3r6dw8_processed.png&w=3840&q=75)
Transcribed Image Text:Table Al – Allowable Ampacities of Insulated Conductors Rated 0 through 2,000 Volts,
60°C Through 90°C not more than Three Current-Carrying Conductors in Raceways,
Cable, Based on Ambient Temperature of 30°C
Temperature Rating of Conductor
90°C
60°C
75°C
Турes
FEPW,
RH, RHW,
THHW,
THW,
THWN,
XHHW,
USE, ZW
60°C
75°C
90°C
Турез
TBS, SA, SIS, FEP,
FЕPB, M, RHH,
ZW-2, RHW-2,
THHN, THHW,
THW-2, THWN-2,
XHHW, XHHW-2
Турes
RH, RHW,
THHW,
THW,
THWN,
XHHW,
USE
Турes
TBS, SA, SIS,
THHN, THHW,
THW_2, THWN-
2, USE-2, XHH,
XHHW, ZW-2,
XHHW-2
Conductor
Size
[mm']
Турes
TW,
Турes
TW,
UF
UF
ALUMINUM or COPPER-
СОРPER
CLAD ALUMINUM
2.0
20
20
25
3.5
25
25
30
20
20
25
5.5
30
35
40
25
30
35
8.0
40
50
55
30
40
45
14
55
65
70
40
50
65
22
70
85
90
55
65
80
30
90
110
115
65
80
90
38
100
125
130
75
90
105
50
120
145
150
95
110
125
60
135
160
170
100
120
135
80
160
195
205
120
145
165
185
210
100
220
140
190
225
265
295
170
125
255
165
200
225
150
240
280
185
225
250
200
280
330
355
220
265
300
250
315
375
400
255
305
345
325
370
435
470
305
365
410
400
405
485
515
335
405
460
00
445
540
580
370
440
495
CORRECTIONFACTOR
Ambient
For ambient temperatures other than 30°C, multiply the allowable
ampacities showWn above by the appropriate factor shown below
1.05
Теmp. ("C)
21 - 25
26 - 30
31- 35
36- 40
41 -45
1.08
1.04
1.08
1.05
1.04
1.00
1.00
1.00
1.00
1.00
1.00
0.91
0.94
0.96
0.91
0.94
0.96
0.82
0.88
0.91
0.82
0.88
0.91
0.71
0.82
0.75
0.67
0.82
0.87
0.71
0.87
0.75
0.67
0.58
0.33
46 – 50
0.58
0.82
0.58
0.82
0.76
0.41
0.76
0.71
51-55
0.41
56 - 60
0.71
0.58
61 - 70
71- 80
Source: Philippine Electrical Code 2000 Part 1, Vol. 1
0.58
0.33
0.58
0.41
0.41
Transcribed Image Text:Table 2 – Full-Load Current for Single-Phase and Three-Phase
Alternating Current Motors
Power
Full-load current at 230 Volts
Amperes
kW
hp
1/6
Single-phase
Three-phase
0.12
2.2
0.19
1/4
2.9
0.25
1/3
3.6
0.37
1/2
4.9
2.2
0.56
3/4
6.9
3.2
0.75
1
8.0
4.2
1.12
1 1/2
10.0
6.0
1.49
2
12
6.8
2.24
3
17
9.6
3.73
5
28
15.2
5.60
7 1/2
40
22
7.46
10
50
28
11.19
15
42
14.92
20
54
18.65
25
68
22.38
30
80
29.84
40
104
Adapted from Philippine Electrical Code 2000 Part 1, Vol.1
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