Alpha Technologies GMX-915 - Manual (Page 26)

26 017-932-B0-002, Rev. B
3.0 Installation, continued
3.3
Service Power Inserter (SPI), continued
6. Replace the SPI cover and reinstall the screws.
7. Verify the switch on the top of the SPI is in the
ON position. The switch in the ON position
selects the GMX Power Supply as the power
source to the cable plant. The switch should
only be in the ALT position when a service
power supply is connected to the cable. At this
time, the standby power supply is bypassed for
service or removal .
8. Verify the SPI is properly grounded. Typically,
grounding is accomplished by one of two
methods:
a. If the SPI has been installed with a mounting bracket, ground connection is made
with paint-cutting star washers (Fig. 3-6) used in conjunction with SPI grounding wire.
b. If the SPI doesn’t utilize the mounting bracket, the ground connection is made via
a #8AWG wire connected to the cover of the SPI (Fig. 3-7) and terminated at the
ground bar of the cabinet (Fig. 3-8).
Fig. 3-7, SPI Grounding Lug Fig. 3-8, Enclosure Ground Bar
Fig. 3-6, Cover Replaced,
SPI Switched On
Enclosure
Wall
Paint-cutting
Star Washers
ALT ON
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