BF 50 Wall Fans
56 Technical User Guide
4.1.12 Cable plans and circuit diagrams
4.1.12.1 General information about circuit diagrams
Symbols are in accordance with the IEC/EN 60617 standard. The classification of the ("letter codes") on the
symbols is in accordance with the IEC/EN 81346-2 standard. Reference designations are in accordance with
IEC/EN 81346-1:2001 structuring principles and reference designations. This standard indicates structured
methods for naming electrotechnical systems.
4.1.12.1.1 Color code
Letter Code Color Standard
BK Black
Color coding on wires are in accor-
dance with standard IEC 60757:
Letter codes to identify colors used
on drawings, diagrams, labelling,
etc.:
BN Brown
RD Red
OG Orange
YE Yellow
GN Green
BU Blue (incl. light blue)
VT Violet (purple red)
GY Grey (slate)
WH White
PK Pink
GD Gold
TQ Turquoise
SR Silver
GNYE Green-and-yellow
4.1.12.1.2 Power supply isolator
The installation of a power supply isolator is required for each motor and
motor control.
4.1.12.1.3 Letter Code
The letter codes used in accordance with standard IEC/EN61346-2.
-F -K -M -Q -S -T -W
Protective
equipment
RCCB / Initial
fuse Protective
motor switch
Controller
Contactor
Fan
Motor
Power supply
isolator
Switch Motor con-
troller
Cable
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