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User Manual
3.5 AC Input Wiring - INPUT
AC input connec
is located on the
labeled "AC INPUT".
Ground (earth) wire must be connected to the chassis of the AC power system using the ground
connection of the AC input terminal block. The mains source must have a current rating equal to or
greater than the input fuses and the input wiring mu
codes.
The AC input compression terminal accommodates a AWG12 to AWG6 wire sizes.
The input power cord must be large enough to handle the input current of the power source and mu
conform to local electrical codes. Note that all wir
maximum current that may occur under low line conditions. Local electrical codes may also require
different wire types and sizes.
Cable le
ngths must not exceed twenty-five (25) feet. For lengths greater than 25 fe
voltage drop from the following formula:
2 X DISTANCE X CABLE RESISTANCE PER FT. X CURRENT = VOLT DROP
For cable lengths less than 25 feet, the following wire gauge AC line input cord is recommended:
AC Line Voltage
115 -
230 V
Note: A
lways in
wiring and before applying power.
CAU
TION: Capacitors in the power source may hold a hazardous electrical cha
the power source has been disconnected from the mains supply. Allow capacitors to
discharge to a safe voltage before touching exposed pins of mains supply connectors.
Power modules need at least 5 minutes to discharge to safe levels before they can be
removed.
California Instruments
tions are to be made directly to the input terminal block. The AC input terminal block
right hand side on the back of the chassis (when facing the back of the unit). It is
Wire Gauge
A
WG12
stall supplied
safety co
st be sized to satisfy the applicable electrical
es must be sized to accommodate the worst-case
Metric Diameter
2.053 mm
ver on A
C input ter
minal block aft
2253i / 2253iX
et, calculate the
Nearest Metric Equivalent
2
4 mm
er conn
ecting input
rge even if
st
36
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