Grundfos SP Installation And Operating Instructions Manual page 37

10.4.3 230 V, 3-phase, 60 Hz
Maximum submersible power cable length (maximum cable length in feet, starter to motor)
Motor
[Hp]
rating
14 12
930 1490
.5
(283) (454)
670 1080
.75
(204) (329)
560 910
1
(171) (277)
420 670
1.5
(128) (204)
320 510
2
(98) (155)
240 390
3
(73) (119)
230 V
140* 230
3-ph 5
(43*) (70)
60 Hz
160*
7.5 -
(49*)
10 - -
15 - -
20 - -
25 - -
30 - -
Note:
* Indicates single conductor only (not jacketed).
No asterisk indicates both jacketed cable and
single-conductor cables.
• The table is based on copper wire. If
aluminum wire is used, multiply lengths by
0.5.
The maximum permissible length of
aluminum is considerably shorter than
copper wire of same size.
• Make sure that the portion of the total cable
which is between the service entrance and a
motor starter/controller does not exceed 25
% of the total maximum length to ensure
reliable starter operation. Single-phase
control boxes may be connected at any point
of the total cable length.
• The table is based on maintaining motor
terminal voltage at 95 % of service entrance
voltage, running at maximum nameplate
amperes. In general, a voltage drop must be
maintained at 3 V / 100 ft or less.
• 1 foot = 0.305 meter (1 meter = 3.28 feet).
AWG copper wire size
10 8 6 4
2350 3700 5760 8910
(716) (1128) (1756) (2716)
1700 2580 4190 6490
(518) (786) (1277) (1978)
1430 2260 3520 5460
(436) (689) (1073) (1664)
1060 1670 2610 4050
(323) (509) (796) (1234)
810 1280 2010 3130
(247) (390) (613) (954)
620 990 1540 2400
(189) (302) (469) (732)
370 590 920 1430
(113) (180) (280) (436)
260 420 650 1020
(79) (128) (198) (311)
190* 310 490 760
(58*) (94) (149) (232)
210* 330 520
-
(64*) (101) (158)
250* 400
- -
(76*) (122)
320*
- - -
(98*)
260*
- - -
(79*)
[ft (m)]
3 2 1
- - -
8060 9860
-
(2457) (3005)
6780 8290
-
(2067) (2527)
5030 6160 7530 9170
(1533) (1878) (2295) (2795)
3890 4770 5860 7170
(1186) (1454) (1786) (2185)
2980 3660 4480 5470
(908) (1116) (1366) (1667)
1790 2190 2690 3290
(546) (668) (820) (1003)
1270 1560 1920 2340
(387) (475) (585) (713)
950 1170 1440 1760
(290) (357) (439) (536)
650 800 980 1200
(198) (244) (299) (366)
500 610 760 930
(152) (186) (232) (283)
400 500 610 750
(122) (152) (186) (229)
330* 410* 510 620
(101*) (125*) (155) (189)
0 00 000 0000
- - - -
- - - -
- - - -
- - -
8780
- -
(2676)
6690 8020 9680
(2039) (2444) (2950)
4030 4850 5870
(1228) (1478) (1789)
2870 3440 4160
(875) (1049) (1268)
2160 2610 3160
(658) (796) (963)
1470 1780 2150
(448) (543) (655)
1140 1380 1680
(347) (421) (512)
920 1120 1360
(280) (341) (415)
760 930 1130
(232) (283) (344)
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