3. Remove the ESD grounding strap from the ESD point on the chassis, and attach it to an approved site
ESD grounding point. See instructions for your site.
4. Disconnect the AC power cord (see Figure 172 on page 373) from the power source.
Figure 172: Three-Phase Wye AC Power Cord
5. Remove the ESD grounding strap from the approved site ESD grounding point. See the instructions
for your site. Reconnect the strap to one of the ESD points on the chassis.
6. Using a number 2 Phillips (+) screwdriver, loosen the four screws on the cover of the metal wiring
compartment that protects the AC terminal block.
7. Remove the cover of the metal AC wiring compartment.
8. Disconnect the wires from the AC terminal block on the three-phase wye AC PDM (see
Figure 173 on page 374), loosen each of the input terminals or grounding point screws, and remove
each wire from the grounding point or input terminal.
To remove wires from the terminal block that serves six PSMs:
a. Remove the wire labeled N from the input terminal labeled N1.
b. Remove the wire labeled L3 from the input terminal labeled C1.
c. Remove the wire labeled L2 from the input terminal labeled B1.
d. Remove the wire labeled L1 from the input terminal labeled A1.
e. Remove the grounding wire from the grounding point labeled GND.
373
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