en – Original instructions
24
Grounding (earthing)
DANGER: Electrical hazard
•
Always connect the external protection conductor to the ground terminal before attempting to
make any other electrical connections
•
Connect all the electric accessories of the pump and the motor to the ground, making sure that
the connections are completed correctly
•
Check that the protection conductor (ground) is longer than the phase conductors; in case of
accidental disconnection of the power supply conductor, the protection conductor (ground)
must be the last one to detach itself from the terminal.
Use a cable with several strands to reduce electric noise.
4.3.2 Wire types and ratings
•
All cables must comply with local and national standards in terms of section and ambient
temperature
•
Use cables with minimum heat resi70°C (158°F); to ensure compliance with UL
(Underwriters Laboratories) regulations, all power supply connections must be completed
using the following types of copper cables with minimum resi75°C: THW, THWN
•
Cables must never enter into contact with the motor body, the pump and the piping.
•
The wires connected to the power supply terminals and the fault signal relay (NO, C) must be
separated from the others by means of reinforced insulation.
e-SM Drive models
Power supply input cable + PE
Tightening torque
Wire numbers
x Max. copper
section
Wire numbers
x Max. AWG
Mains and motor
cable terminals
Earth Conductor
103, 105, 107, 111,
115
3 x 1.5 mm
2
3 x 0.0023 sq.in
3 x 15 AWG
Spring connectors
Spring connectors
303, 305, 307, 311,
315, 322
4 x 1.5 mm
2
4 x 0.0023 sq.in
4 x 15 AWG
0.8 Nm
7.1 lb-in
3 Nm
26.6 lb-in
Control cables
External volt free contacts must be suitable for switching < 10 VDC.
NOTE:
•
Install the control cables separate from the power supply cables and the fault signal relay
cable
•
If the control cables are installed in parallel with the power supply cable or the fault signal
relay, the distance between the cables must exceed 200 mm
•
Do not intersect the power supply cables; should this be necessary, a 90°intersection angle is
permitted.
e-SM Drive control cables
Wires number
x Max. copper Section
AWG
Tightening torque
All I/O conductors
0.75÷1.5 mm
2
0.00012÷0.0023 sq.in
18÷16 AWG
0.6 Nm
5.4 lb-in
