Toshiba CTX28 manual Rack Mount Cabinet Grounding

Rack Mount Cabinets

Step 15: Attach Front and Back Covers

		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
		Power
		Supply
		“B” Point “B” is always on the		ONEAC 6-AP
				or 6-DP
		Base Cabinet, whether it's
Base		on the top or bottom.		Solid State
				Secondary
Cabinet
				Protectors
	Cabinet Motherboard	Insulated Ground Wire “B”
		Note:		AWG #6 Wire
		The impedance of the link		(minimum)
		between point “A” and “B” must		Length: 60 Feet
		be less than 0.25 ohms.		(maximum)
	Cabinet
	Motherboard
			Single Point Ground (SPG)
			Cold Water Pipe or Ground Rod
			Note:
Up to six	Cabinet	AWG #6 Wire	The SPG cannot be structural
	Motherboard		steel members or conduit.
Expansion		(minimum)
Cabinets		Length: 60 Feet	Earth Ground:
		(maximum)
			Per General Rules of Article
			250 of the National Electric
	Cabinet		Code, NFPA70
	Motherboard	120VAC System Primary Power ( 1-5 cabinets only )
				NEMA 5-15R,
				120VAC
	Cabinet			“A”
	Motherboard
7076				Note:

Green ground	FG Screws	Building Main Power	The impedance of
wires from		Panel Electrical Ground	the link between
Motherboard	Inter-cabinet green wires	115VAC ± 10VAC (50/60 Hz)	point “A” and “B”
	supplied with each cabinet	Dedicated 20 Amp	must be less than
		Branch Circuit	0.25 ohms.
	Third Wire	208 or 240VAC System Primary Power ( 1-7 cabinets )
The cabinets must be	AC Ground		NEMA 6-20R,
located no more than 9	Note:
			240VAC
feet from the AC outlet.
	The ground must be		“A”
	routed through the		Note:
	same conduit as the	Building Main Power
	phase conductors		The impedance of
		Panel Electrical Ground
	serving the system.		the link between
		208VAC ± 20VAC (50/60 Hz)
		or 240VAC ± 20VAC (50/60 Hz)	point “A” and “B”
	Note:	Dedicated 20 Amp	must be less than
	The system may be	Branch Circuit.	0.25 ohms.

powered by 120, 208,	If 208VAC is used, the plug may have to be
or 240VAC.
	changed by a licensed electrician.

Rack Mount Cabinets

Figure 5-5 Rack Mount Cabinet Grounding

Strata CTX I&M 06/04 5-19