CTX28 Installation
AC Power and Grounding Requirements
Strata CTX28 I&M 3/05 1-5
Ground Test
Test the “wire ground” for continuity by either measuring the resistance between the TB3 terminal
(earth ground) on the GMAU and the common point ground on (or near) the MDF, or the utility
entrance ground (maximum: 1 ohm), or by using a commercially available earth ground indicator.
If neither procedure is possible, perform the following earth ground test procedure.
Table 1-2 Ground Wiring Summary
Grounding Requirement From To Description
System connects to earth ground Earth ground TB3 on GMAU
Less than 1 ohm
FG of HPFB-6 connect to GMAU HPFB-6 FG Screw TB1 on GMAU
HPFB-6 Ground Feed TB1 on GMAU TB3 on GMAU
GETS connects green ground wire to
GMAU
GETS ground wire TB2 on GMAU
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