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NetSure 502NGFB Installation Manual (Section 6009)
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Rev. Z
26
MAKING ELECTRICAL CONNECTIONS
Important Safety Instructions
DANGER!
Adhere to the “Important Safety Instructions” presented at the front of this document.
Wiring Considerations
For recommended wire sizes, crimp lugs, branch circuit protection, alarm relay contact ratings, and general
wiring information and restrictions; refer to System Application Guide SAG582136700. The SAG is located in
the separate User Manual.
Refer to drawing 031110100 for lug crimping information. Refer to drawings 031110200 and 031110300 for
additional lug information. These are located in the Installation Manual.
All wiring and branch circuit protection should follow the current edition of the American National Standards
Institute (ANSI) approved National Fire Protection Association's (NPFA) National Electrical Code (NEC), and
applicable local codes. For operation in countries where the NEC is not recognized, follow applicable codes.
Relay Rack Frame Grounding Connection
For relay rack grounding requirements, refer to the current edition of the American National Standards Institute
(ANSI) approved National Fire Protection Association's (NPFA) National Electrical Code (NEC), applicable local
codes, and your specific site requirements.
Procedure
1.
Attach a customer grounding network lead to the equipment mounting rack(s) per site requirements.
Holes are provided on the top of each relay rack for installing a lead with a two-hole lug that has 1/4" bolt
clearance holes on 5/8" centers. When using 1/4-inch hardware, recommended torque is 84 in-lbs when
a standard flat washer and lock washer are used.
Power/Distribution Shelf Frame Grounding Connection
For shelf grounding requirements, refer to the current edition of the American National Standards Institute
(ANSI) approved National Fire Protection Association's (NPFA) National Electrical Code (NEC), applicable local
codes, and your specific site requirements.
Procedure
1.
The frame grounding connection to the shelf is made by using grounding washers with the mounting
hardware used to secure the shelf to the relay rack or cabinet. Refer to the previous procedure
“Securing the Power/Distribution Shelf to a Relay Rack or Cabinet”. Ensure that the relay rack or cabinet
is properly grounded.
NOTE!
The DC return connection to this system can remain isolated from system frame and chassis
(DC-I).
AC Input and AC Input Equipment Grounding Connections
Follow the Admonishments listed at the beginning of this section when making AC input connections.
