Chapter 3 Environment description and installation
3-11
3.3.4
Safety and EMC: Good wiring practice IP20 models
iDrive
EDX-220-21-E
(for example)
Motor
L1(L) L3(N) PE
P N T1 T2 T3 PE
L1
L2
L3
N
E/Ground
BACK PLATE
(paint/coating free)
Brass earth studs
fixed through
back plate and
secured with
shake-proof
washers.
NB. Both ‘PE’
terminals must be
linked to back
plate with
4mm
2
(min) cable
as shown.
Optional ferrite
choke, only required
if motor cable is
very long.
Note: For very long
cables an ACR
should be used
External earth /
ground conductor
if used.
**
Local
Isolator
Note: Power supply side ancillary equipment
not shown in this diagram, for clarity.
Earth / ground
cables connected
through isolator
Armoured or
screened cable,
3C or 4C.
Screen
connected at all
ends as shown.
**
**
NOTE 2
Screen / armour must
be connected as shown
at each end of cable
sections.
If motor connection
box is plastic, screen
must be secured to the
metal frame of the
motor.
415V 50Hz
3-phase + N
Power supply
*
NOTE 1
Enclosure (& backplate) must
be connected to main earth system
by single 10mm
2
c.s.a. copper
conductor to conform to BS7671
*
10mm
2
ENCLOSURE
4mm
2
4mm
2
