Electrical Installation; Electrical Requirements; Wire Types And Ratings - Lowara e-LNEEE Installation, Operation And Maintenance Manual

en – Original instructions

4.2 Electrical Installation

DANGER: Electrical hazard
The connection to the electric power supply must be completed by an electrician possessing the
technical-professional requirements outlined in the current regulations.

4.2.1 Electrical requirements

Local directives prevail on the specific requirements indicated below.
Electrical connection checklist
Check that the following requirements are met:
 The electrical leads are protected from high temperature, vibrations, and collisions.
 The current type and voltage of mains connection must correspond to the specifications on
 The power supply line is provided with:
The electrical control panel checklist
NOTICE:
The control panel must match the ratings of the electric pump. Inappropriate combinations do not
guarantee the protection of the unit.
Check that the following requirements are met:
 The control panel must protect the pump against short-circuit. A time lag fuse or a circuit
 The pump has built in overload and thermal protection, no additional overload protection is required.
DANGER: Electrical hazard
Before starting work on the unit, make sure that the unit and the control panel are isolated from
the power supply and cannot be energized.
Grounding (earthing)
DANGER: Electrical hazard
 Always connect the external protection conductor to the ground terminal before attempting to
 Connect all the electric accessories of the pump and the motor to the ground, making sure that
 Check that the protection conductor (ground) is longer than the phase conductors; in case of
Use a cable with several strands to reduce electric noise.

4.2.2 Wire types and ratings

 All cables must comply with local and national standards in terms of section and ambient
 Use cables with minimum heat resistance +70°C (158°F); to ensure compliance with UL
 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
20
the data plate on the pump.
- High sensitivity earth leakage circuit breaker (30 mA) [RCD residual current device] suitable
for fault currents to the earth, with pushbutton AC or DC components (single-phase
version), or pushbutton AC or DC and direct current components (three-phase version)
- A mains isolator switch with a contact gap of at least 3 mm.
breaker (Type C model is suggested) can be used to protect the pump.
make any other electrical connections
the connections are completed correctly
accidental disconnection of the power supply conductor, the protection conductor (ground)
must be the last one to detach itself from the terminal.
temperature
(Underwriters Laboratories) regulations, all power supply connections must be completed
using the following types of copper cables with minimum resistance +75°C: THW, THWN
separated from the others by means of reinforced insulation.