Sequoia / Tahoe Series User Manual California Instruments
44 M447352-01 REV-A
AC INPUT L3 AC Input
- 208 V
LL
10%
- 230 V
LL
10%
- 380 V
LL
10%
- 400 V
LL
10%
- 480 V
LL
10%
3-Phase, Line-Line
Line-3 input from utility AC mains
GND
Safety
Ground
N/A
Safety-Ground connection from utility
earth protection-ground
Table 3-1. AC Input Connector Pinout and Safety-Ground, for 3-Wire plus Ground Input
Connector Type
AC Input
Manufacturer Name: MARATHON SPECIAL PRODUCTS
Manufacturer Part Number: 1323574
Tightening torque: 0.7 Nm, min (6 lb-in) to 1.13 Nm, max (10 lb-in);
Wire cross section: 2.5 mm
2
, min (14 AWG) to 70 mm
2
, max (2/0 AWG).
Wire stripping length and lug would depend upon the size of wire used.
Safety-Ground
Stud name : FHS-0420-14
Stud Type : Thread specification of ANSI B1.1, 2A with length of 22 mm.
Manufacturer Name for Nut : MCMASTER-CARR
Manufacturer Part Number for Nut : 91240A029
Nut tightening torque : 7.57 Nm (67 lb-in), max.
Table 3-2. AC Input Connector Type
No wiring for AC input connections is provided with the Sequoia/Tahoe Series and must be provided by
the end-user or installer. Input wiring should be entered through wire access opening located at the rear
bottom of the chassis (see Figure 3-3). A wire channel is provided to allow the input wiring to be routed to
the connections that are to be made.
WARNING!
A suitable overcurrent protection device must be provided externally to power supply’s input
connection, within the system installation, to protect the external wiring and interconnects.
The power supply’s input connection wiring gauge (size) must be sized for the maximum
input current rating to ensure user safety and avoid possible power source damage,
regardless of the actual output load.
CAUTION!
To comply with product safety requirements, EARTH GROUND must be connected to the
chassis of the AC power system using the ground stud located directly below the AC input
fuse block. Use a Green/Yellow ground wire.
CAUTION!
Do not use the Neutral connection of a 3-phase Wye AC power connection in place of a true
earth ground connection. AC power system neutrals cannot be used for the protective earth
ground.
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