28
031-295-B0-001, Rev. B (11/2018)
2.6.2 Connecting the Service Power Inserter (SPI)
The standard SPI (Alpha p/n 020-019-31) can be mounted in any of three locations as shown in the illustrations below.
Three knockouts (one at the rear of the enclosure and two on the side) are available for this version of the SPI allowing
greater flexibility with regard to the installation of the coaxial cable.
Fig. 2-10, Mounting locations for the standard SPI
Installation Procedure:
1. Use the hammer and punch to remove the 3/4" knockout from either front or rear location on the right side (as
viewed from the front) or the right rear corner of the enclosure.
2. Use a 1" wrench to remove the output port fitting from the SPI.
3. Position the SPI inside the enclosure and fix in place by reattaching the output port fitting to the body of the SPI.
Tighten to 130 in-lbs.
4. Disconnect the SPI from all power sources.
5. If needed, remove the cover, exposing the circuit board and seizure screw assembly.
6. Loosen the seizure screw.
7. Screw the Coaxial Termination into Output Port at the rear of the SPI, inserting the stinger into the seizure screw
assembly.
8. To prevent arcing and failure of the unit, tighten seizure screw to 35 in-lbs.
9. Replace cover and reinstall screws.
10. Verify switch on front of SPI is on the ON position.
Fig. 2-11, Cover Removal
Fig. 2-12, Coaxial Cable Connection
2.0 Installation, continued
Disconnect all power sources from the SPI (Service Power Inserter) before removing its cover. Verify that the
SPI is disconnected from both the utility power and the power supply before beginning procedure.
WARNING! ELECTRICAL HAZARD
Installed in
side knockout
Installed in
side knockout
Installed in
rear knockout
Seizure Screw
Output Port
Coaxial Termination
Stinger
Seizure Screw
SPI Cover
(Close up view)
