Toshiba V Series - 3.3 Mounting in the Base Unit

6F8C0942 33
5.2 Separation from Other Cables
5
5.2 Separation from Other Cables
Normally, separate the trunk cables 2 meters away from the power lines and other
devices which produce a magnetic field or an electric field. If it is difficult to separate
them by a space of 2 meters, observe the figures given relative to the actual voltages and
amperages of the sources of induction in Table 5-2.
Considering protection from noise, a covered metal cable duct or steel-made protection
tube is recommended. The recommended minimum separation distances between
parallel signal lines and power cables in using the above means of protection are shown
in Table 5-3.
Note: Excerpt from the Guideline for the Environment of Installing Microcomputer-
applied Instrumentation and Control Devices (by the [Japan Electric Measuring
Instruments Manufacturers' Association])
Table 5-2 Recommended Minimum Separation Distances
Amperage/voltage of
induction source
Minimum distance between parallel lines (mm)
Over 100 A 100 A or less 50 A or less 10 A or less
Over 440 V 2000 2000 2000 2000
440 V or less 2000 600 600 600
220 V or less 2000 600 600 500
110 V or less 2000 600 500 300
60 V or less 2000 500 300 150
Table 5-3 Recommended Minimum Separation Distances
(Installation in Covered Metal Ducts or Steel Protection Tubes)
Cabling method Covered metal duct or steel protection tube (mm)
Total parallel
distance
10m or
less
25m or
less
100m or
less
200m or
less
500m or
less
Over 501m
Power cable
125V or less
10A or less
Over 10 Over 10 Over 50 Over 100 Over 200 Over 250
250V or less
50A or less
10 50 150 200 250 250
400V or less
100A or less
50 100 200 250 250 250
500V or less
200A or less
100 200 250 250 250 250
In excess of
the above
Over 500