Emerson Liebert NPS - Cable Entry and Termination; Cable Rating and Connections; Safety Earth Connection Procedure

Chapter 3 - Installation Procedure User Manual
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3.3 Connecting cables to Network Power Switch
WARNING
BEFORE CABLING-UP THE NETWORK POWER SWITCH, ENSURE THAT YOU ARE AWARE OF
THE LOCATION AND OPERATION OF THE EXTERNAL ISOLATORS THAT CONNECT THE
NETWORK POWER SWITCH INPUT SUPPLY TO THE MAINS DISTRIBUTION PANEL.
CHECK THAT THESE SUPPLIES ARE ELECTRICALLY ISOLATED, AND POST ANY NECESSARY
WARNING SIGNS TO PREVENT THEIR INADVERTENT OPERATION.
3.3.1
3.3.2
Cable entry
Cable enter the Network Power Switch cabinet, from the rear side as shown in figure 5.1.2. The cables are terminated
on the connectors and fuses.
Cable Rating
Following are the recommended cable size for 6kVA Network Power Switch –
Table 3-1
Description Max. Current rating (Amp) PVC cable (sq.mm)
Input Cables 25 4
Output Cables 25 4
Earthing - 2.5
Note:
These recommendations are for guideline purposes only and may be superseded by local regulations and codes
of practices.
3.3.3
3.3.4
Cable connections
Following are the set of external power cables, which are connected to the Network Power Switch equipment –
• Input source 1 – Line
• Input source 2 – Line
• Input source 1 – Neutral
• Input source 2 – Neutral
• Output – Line
• Output – Neutral
• Earthing
These cables are connected to the terminals on rear side of the equipment as shown in figure 5.1.2 in Chapter 5.
Safety earth
The safety earth busbar is provided on the rear side of equipment .The safety earth cable must be connected to this
busbar.
WARNING
FAILURE TO FOLLOW ADEQUATE EARTHING PROCEDURES CAN RESULT IN ELECTRIC
SHOCK HAZARD TO PERSONNEL, OR THE RISK OF FIRE, SHOULD AN EARTH FAULT OCCUR.
Page 3-2 (03/04)