Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 Installation Instructions, PRIOR to Firmware rev. 3.0 - Manual (Page 20)

Publication 1404-IN007D-EN-P - October 2004
20 Powermonitor 3000
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Install and connect all wiring in a neat and workmanlike
manner. Use wire tags to identify connections. Bundle wiring
neatly and maintain a minimum of 50 mm (2.0 inches) clearance
from the Master Module ventilation slots to avoid a buildup of
heat within the unit
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Furnish and install properly-selected fuses for voltage signals
and control power
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Use 600 volt wiring rated at 75°C (167°F) or higher. We strongly
recommend the use of flame-retardant wire rated VW-1 by
Underwriters Laboratories
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Use a shorting terminal block (provided by customer) for CT
wiring, to permit servicing connected equipment such as the
Powermonitor 3000 Master Module without de-energizing the
power system
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Use ring lugs or locking spade lugs for voltage and current
connections to provide additional wiring security and safety
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Pay careful attention to correct phasing and polarity for proper
operation
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Connect the Master Module to a low-impedance earth ground
using its grounding terminal and a dedicated grounding wire at
least as large as the largest current-carrying wire connected to
the Master Module. Keep grounding wiring as short as possible.
To obtain maximum EMI immunity, the Master Module
mounting feet should make electrical contact with the mounting
panel. Refer to Mounting of Master Module on page 16 for
additional information.
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Connect all equipment ground terminals (Master Module, PT
and CT secondary) to a single point, low impedance earth
ground
For information on wire sizes and types for grounding electrical
equipment, refer to publication 1770-4.1, Industrial Automation Wiring
and Grounding Guidelines for Noise Immunity or the National Electric
Code published by National Fire Protection Association (NFPA).
Wiring of Master Module
Terminal Blocks Wire Sizes and Screw Torques - Observe all wire lug
sizes and screw torques. Refer to Technical Specifications on page 59.