3. Cabling
3-5
TI 33Q01J10-01E
3.2
Connecting Power
Power is connected either by using a grounding-type bipolar (three-pin) plug or by wiring
to terminals.
When piece of CS 3000 equipment has a power switch, it is recommended that you install
a breaker for each piece of equipment in the same room, for maintenance and safety
considerations.
CAUTION
• Power cables must be laid 1 cm or further away from signal cables.
• Power and grounding cable are use power and ground cables which are in conformance
with the safety standard of each country.
Type and Maximum Length of Power Cables
Formulas are given below for determining the type and the maximum length (m) of branch cables
from an indoor low-voltage main line.
• The standard type of cable used (nominal cross sectional area) is equivalent to JIS C 3312.
• Calculate the maximum power cable length from the following conditions in Figure.
However, the power cable must meet the conditions described in Section “1.3 Power Supply
System”, “AC Power Specification”.
Low-voltage
wiring
Power
dstribution
board
Power distribution
board
Equivalent voltage drop (referred to 100 V
supply) of 2 V or less in the main line, viewed
from the indoor power distribution board
Voltage drop of 2 V or less
across this section of wiring
Equip-
ment
L (m)
AC wiring (100 V AC, 220 V AC)
High-voltage
wiring
Voltage drop of 1.2 V or lower
across this setction of wiring
L (m)
24 V DC±10 %
DC wiring (24 V DC)
Note:
A voltage drop may be thought of as
the load fluctuation that would result
if the load were turned on and off.
F030205.ai
Equip-
ment
Figure Maximum Cable Length Calculation Conditions
Sep. 30, 2008-00
