6.7: ELECTRICAL POWER SYSTEM COMPONENTS

6.7 ELECTRICAL POWER SYSTEM COMPONENTS

See Table 6.16 for dc capacities of copper bus bars.

Table 6.16: DC Current-Carrying Capacities Copper Bus
Size ^[*]	Current-carrying capacity (DC), ^{[ ]} A
? 1	245
? 2	445
? 3	695
? 4	900
1	365
1	445
2	645
3	990
4	1280
5	1560
6	1830
8	2320
? 1	500
? 2	890
? 3	1250
? 4	1590
? 5	1920
? 6	2260
? 8	2860
1	605
2	1040
3	1460
4	1860
5	2250
6	2620
8	3360
^[*]Flat, rectangular copper bus bars. ^{[ ]}30 C temperature rise; 40 C ambient temperature.

See Tables 6.17a, 6.17b, and 6.17c for data on ac (60-Hz) current-carrying capacities for copper bus bars, copper round rods, and copper pipes.

Table 6.17a: AC Current-Carrying Capacity Copper Bus

Table 6.17b: Physical and Electrical Properties for Round Copper Rods
	Cross-sectional area		DC resistance	60-Hz current rating, A (indoor)
Diameter, in	in ²	kcmil	Weight, lb/ft	??/ft	SE	30 C rise	50 C rise
Electrolytic tough-pitch copper #110
	0.0491	62.5	0.1897	170.4	1.00	107	136
?	0.1104	140.6	0.4268	75.8	1.00	190	240
	0.1964	250.0

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