Cable Sizing; Fitting The Submersible Drop Cable - Grundfos SQ Manual Del Usuario

6.6 Cable sizing

Grundfos can supply submersible drop cables for
any type of installation.
The cross-section of the submersible
drop cable must be large enough to
Caution
meet the voltage requirements
specified in section 5.1 General.
The table values below are calculated from the
following formula:
I x 2 x 100 x PF x L x ρ
q =
U x ΔU
where
q = Cross-section of submersible drop cable
2
[mm ].
I = Rated maximum current of the motor [A].
PF = 1.0.
L = Length of submersible drop cable [m].
ρ
= Specific resistance: 0.02 [Ωmm
U = Nominal voltage [V].
ΔU = Voltage drop [%] = 4 %.
The 4 % voltage drop is according to IEC 3-64,
HD-384 Series.
The calculation gives the following maximum cable
lengths at a supply voltage of 240 V:
Motor
I
N
(P2)
[kW] [A]
0.7 5.2
1.15 8.4
1.68 11.2
1.85 12

6.7 Fitting the submersible drop cable

It is recommended to join the submersible drop cable
and the motor cable by means of a Grundfos cable
termination kit, type KM.
Cable termination kit, type KM
Cross-sectional area
2
1.5 to 2.5 mm
2
4.0 to 6.0 mm
For larger cross-sections, please contact Grundfos.
14
2
/m].
Max. cable length [m]
2
2.1 mm /
2
1.5 mm
14 AWG
80 112
50 69
37 52
35 49
Product number
96021462
96021473
Pumpland.ru
Cable size
2
3.3 mm /
2
2.5 mm
12 AWG
133 176
83 109
62 82
58 76
2 2
4 mm 6 mm
213 320
132 198
99 149
92 139