Strata CTX670 Installation
3-19
Strata CTX I&M September 2002
Figure 3-11 Cabinet Earthing
Cabinet Motherboard
Cabinet
Motherboard
Cabinet
Motherboard
Cabinet
Motherboard
Cabinet
Motherboard
FG Screws
Power
Supply
FG (Frame Ground) Screws
The Single Point Ground must always be connected to
the Base Cabinet Power Supply FG Screw
Expansion
Cabinets
Inter-cabinet green wires
supplied with each cabinet
Green/Green Yellow
ground wires from
Motherboard
Earth Ground:
AWG #6 Wire
(minimum)
Length: 60 Feet
(maximum)
Per General Rules IE REGS
16th Edition
BMEP
Third Wire
AC Ground
Insulated Ground Wire “B”
Note:
The impedance of the link
between point “A” and “B” must
be less than 0.25 ohms.
Note:
The ground must be
routed through the
same conduit as the
phase conductors
serving the system.
“A”
Note:
The impedance of
the link between
point “A” and “B”
must be less than
0.25 ohms.
Building Main Power
Panel Electrical Ground
240VAC ± 20VAC (50/60 Hz)
Dedicated 20 Amp
Branch Circuit.
,
240VAC
208 or 240VAC System Primary Power
“B”
42mm Green/Yellow Earth Wire.
Max Impedance = Ω
Point “B” is always on the
Base Cabinet.
Base
Cabinet
5044 CT I&
The cabinets must be
located no more than 9
feet from the AC outlet.
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