Nortel Passport 15000 Preparation Manual page 137

Table 23
Cable identification, North America
Conductor potential
-48/-60 V
0 V, the grounded side
of the dc power supply
grounded
(or bonded to ground)
According to the standard IEC-950, the framework ground or the framework
bonding conductors are also known as protective earth. The green and yellow
ratio of color for the ground relative to a power cable is nominally 50/50 but
must be no less than 30% and no more than 70% for either color.
Table 24
Cable identification, Germany
Signal name Function
-48/-60 V dc power
BR battery return
FG frame ground
LR logical return
-48/-60 V dc power
BR battery return
Passport 15000, 20000 Site Requirements and Preparation Guide
Chapter 4 Power and grounding preparation 137
Function
dc power
dc power return battery
return, BR conductor
framework ground,
framework bonding
conductor
Color code
black (or blue) with tape marked L-
black (or red) with tape marked L+
green and yellow
(or black)
black
black (or blue) with tape marked L-
black (or red) with tape marked L+
Conductor Color code,
label if used
L- blue
L+ red
FB green, 50%
and
yellow, 50%
5.2S2