Electrical Installation; Protection Against Electric Shock, Indirect Contact; Cable Requirements - Grundfos CRE Installation And Operating Instructions Manual

5. Position the plastic cover correctly on the four rubber pins (C).
Make sure that the locking tabs (A) are placed correctly.
A
Positioning the plastic cover
6. Fit the terminal box cover, and make sure that it is also turned
180° so that the buttons on the operating panel are aligned with
the buttons on the plastic cover.
7. Tighten the four screws (TX25) with 5 Nm.
Fitting the terminal box cover

6. Electrical installation

A
C
If the power supply cable is damaged, it must be replaced by the
manufacturer, the manufacturer's service partner or a similarly
qualified person.
The user or the installer is responsible for the installation of correct
grounding and protection according to local regulations. All
operations must be carried out by a qualified electrician.

6.1 Protection against electric shock, indirect contact

Protective-ground conductors must always have a yellow/green
(PE) or yellow/green/blue (PEN) color marking.
Protection against power supply voltage transients
The motor is protected against power supply voltage transients in
accordance with EN 61800-3.
Motor protection
The motor requires no external motor protection. The motor
incorporates thermal protection against slow overloading and
blocking.

6.2 Cable requirements

Cable cross-section
Single-phase supply
Conductor type
Solid
Stranded
Three-phase supply
Conductor type
Solid
Stranded
DANGER
Electric shock
Death or serious personal injury
‐
Switch off the power supply to the motor and to the
signal relays. Wait at least 5 minutes before you make
any connections in the terminal box. Make sure that
the power supply cannot be accidentally switched on.
DANGER
Electric shock
Death or serious personal injury
‐
Check that the supply voltage and frequency
correspond to the values stated on the nameplate.
WARNING
Electric shock
‐
Death or serious personal injury
‐
Connect the motor to a protective ground and provide
protection against indirect contact in accordance with
local regulations.
DANGER
Electric shock
Death or serious personal injury
‐
Always comply with local regulations as to cable
cross-sections.
Conductor material
Copper
Conductor material
Copper
Cross section
2
[AWG]
[mm ]
0.5 - 2.5 28-12
0.5 - 2.5 30-12
Cross section
2
[AWG]
[mm ]
0.5 - 10 18-8
0.5 - 10 18-8
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