Measurement Guide

Grundfos cannot be held responsible for wrong sizing based on this guide. If any questions to selection or sizing please feel free to contact us any time or go to grundfos.us DN000430_1220
GROUNDWATER  QUICK SIZING  CABLE
SQ CABLE
· Supply voltage 240 V
· 5% voltage drop
P2
[kW]

MAX
[A]
Wire cross sectional area [mm
2
]
1.5 2.5 4.0 6.0
Maximum cable length [m]
0.70 5.2 86 144 230 346
1.15 8.4 53 89 142 214
1.68 11.2 40 66 107 160
1.85 12.0 37 62 100 150
How to select the cross-sectional
area of the individual wire of a
submersible drop cable
1. Select SQ pump incl. motor size
2. Required total length of cable (D + E + F)
3. Read the cross-sectional area of
individual wire of the drop cable
Example:
1. SQ pump incl. motor size
SQ 2-70, motor size 1,15 kW
2. Distance from pump to the power source
(outside 44 m (D + F) + inside 6 m (E))
50 m
3. Selected cross-sectional area
1,5 mm
2
Level of well head
Dynamic water level
F (25 m)
D
(19 m)
E (6 m)
Power source Cable entrance
house
Supply voltage 240 V 5% voltage drop
and cable supplied by Grundfos.
!
MAXIMUM CABLE LENGTH
HOW TO SELECT THE CROSSSECTIONAL AREA
Quick selection guide
GRUNDFOS DOMESTIC COLD WATER