Strata CTX670 Installation

Ground the System

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

 

 

 

5044

 

 

 

 

Note:

Green/Green Yellow

FG Screws

Building Main Power

The impedance of

Panel Electrical Ground

the link between

ground wires from

 

Inter-cabinet green wires

115VAC ± 10VAC (50/60 Hz)

point “A” and “B”

Motherboard

supplied with each cabinet

Dedicated 20 Amp

 

must be less than

 

 

 

 

 

 

Branch Circuit

 

0.25 ohms.

 

The cabinets must be

Third Wire

208 or 240VAC System Primary Power ( 1-7 cabinets )

 

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.

 

Installation

Strata CTX670

 

 

Figure 4-11 Cabinet Grounding

Strata CTX I&M 06/04

4-19

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Image 145
Toshiba CTX28 manual Cabinet Grounding