77
FieldSmart
®
Fiber Active Cabinet (FAC) 900
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Installation Manual
Direct: 763.476.6866 • National: 800.422.2537 • www.SeeClearfield.com • [email protected]
Manual 020420 REV B - April 2019
Installing the Cabinet and EXM Ground Connections
You must install the cabinet's connection to the earth ground circuit before you connect commercial power to the cabinet.
You may also install the Expansion Module's (EXM) connection to an earth ground circuit, however this is optional.
Guidelines
Clearfield recommends adhering to PANI grounding methods to reduce ground current interaction:
• The PANI system divides the ground bar into sections, with one type of conductor in each section:
P
roducers, surge
A
bsorbers,
N
on-isolated and
I
solated (PANI).
• The middle position on the ground bar bisects separate ground connections for surge producers from surge absorbers/
active electronics.
• The earth ground connection on the cabinet ground bar serves as the primary surge absorber to isolate the equipment
grounds from the surge-producing grounds.
•
The EXM subground bar serves as the primary surge absorber to isolate the equipment grounds from the surge-pro
-
ducing external grounds in the EXM, when installed. For the EXM earth ground connection, choose one of the following
methods (but not both):
• Best practice:
Connect the "Earth Ground" lugs on the EXM subground bar to a ground rod.
• Alternate:
Connect from the "Earth Ground" lugs on the EXM subground bar to the "FAC 900/EXM Subground"
lugs on the FAC 900 main ground bar.
