Cable Sizing; Splicing The Cable; Fitting The Cable Guard; Piping - Grundfos SQ Series Installation And Operating Instructions Manual

5. Cable sizing

Single-phase 60 Hz maximum cable length motor service to entrance:
Motor rating
Volts hp amps
115 0.5
230 0.5
230 0.75
230 1.0 11.2
230 1.5
Note: The values apply to 230 V, 60 Hz, and conform to the requirements stated in the National Electrical
Code Book.
Note: Recommended maximum cable length between the SQE and the CU 300 or CU 301 control box = 650 ft.

6. Splicing the cable

Splice the drop cable with the motor cable.
The splice must be made carefully.
It is recommended to use a third-party-approved
watertight junction box or splice connection.

7. Fitting the cable guard

To fit the cable guard, proceed as follows:
1. Make sure that the motor lead lies flat in the
cable guard.
2. Place the cable guard in the groove in the cable
plug. The two flaps must engage with the upper
edge of the pump sleeve, see fig. 6.
Fig. 6 Placing the cable guard
3. Fasten the cable guard to the pump suction
strainer with the two self-tapping screws sup-
plied, see fig. 7.
Maximum lengths of copper wire in feet (9% voltage drop)
14 AWG 12 AWG
12 140 220
5.2 640 1000
8.4 400 620
300 460
12 280 430
10 AWG 8 AWG
360 550
1660 2250
1030 1580
770 1190
720 1110
Fig. 7 Fitting the cable guard to the pump
suction strainer

8. Piping

• The pump should only be gripped by the two flats
at the top of the pump, see fig. 8.
• The pump can be installed vertically or horizon-
tally. During operation, the pump must always be
completely submerged in water.
• When plastic pipe is used, a stainless-steel safety
wire is recommended for lowering and lifting the
pump. Fasten the wire to the eyelet on the pump,
see fig. 9.
• The threaded joints must be well cut and fit
together tightly to ensure that they do not work
loose.
Fig. 8 Gripping the pump
6 AWG 4 AWG 2 AWG
880 1390
4060 –
2510 3970
1890 2980
1760 2780
2260
–
–
4850
4530
7