Toshiba STRATA DK14 Installation And Maintenance Manual page 280

DK424i Installation
Step 3: Ground the System
Base
Cabinet
Expansion
Cabinets
5044
Green/Green Yellow
ground wires from
Motherboard
The cabinets must be
located no more than 9
feet from the AC outlet.
Figure 7-11 Cabinet Grounding
7-18
The Single Point Ground must always be connected to
the Base Cabinet Power Supply FG Screw
(Top cabinet - Wall Mount or Bottom cabinet - Floor Mount.)
FG (Frame Ground) Screws
Cabinet Motherboard
Cabinet
Motherboard
Cabinet
Motherboard
Cabinet
Motherboard
Cabinet
Motherboard
FG Screws
Inter-cabinet green wires
supplied with each cabinet
Third Wire
AC Ground
Note:
The ground must be
routed through the
same conduit as the
phase conductors
serving the system.
Note:
The system may be
powered by 120, 208,
or 240VAC.
Power
Supply
"B" Point "B" is always on the
Base Cabinet, whether it's
on the top or bottom.
Insulated Ground Wire "B"
Note:
The impedance of the link
between point "A" and "B" must
be less than 0.25 ohms.
Single Point Ground (SPG)
Cold Water Pipe or Ground Rod
Note:
The SPG cannot be structural
AWG #6 Wire
steel members or conduit.
(minimum)
Length: 60 Feet
Earth Ground:
(maximum)
Per General Rules of Article
250 of the National Electric
Code, NFPA70
120VAC System Primary Power
Building Main Power
Panel Electrical Ground
115VAC ± 10VAC (50/60 Hz)
Dedicated 20 Amp
Branch Circuit
208 or 240VAC System Primary Power
Building Main Power
Panel Electrical Ground
208VAC ± 20VAC (50/60 Hz)
or 240VAC ± 20VAC (50/60 Hz)
Dedicated 20 Amp
Branch Circuit.
If 208VAC is used, the plug may have to be
changed by a licensed electrician.
ONEAC 6-AP
or 6-DP
Solid State
Secondary
Protectors
AWG #6 Wire
(minimum)
Length: 60 Feet
(maximum)
NEMA 5-15R,
120VAC
"A"
Note:
The impedance of
the link between
point "A" and "B"
must be less than
0.25 ohms.
NEMA 6-20R,
240VAC
"A"
Note:
The impedance of
the link between
point "A" and "B"
must be less than
0.25 ohms.
Strata DK I&M 6/00