IBM T00 - Page 28

13. If your rack is an ac rack, do the following:
a. With the external power cable connected to the system unit, check for 0.1 ohm or less resistance
between the ground lug on the external power cable plug and the metal frame.
L1
L1
L1
1
2
1 Rear View of Rack
2 Ohm Meter
b. Using the appropriate probe, check for 0.1 ohm or less resistance between the metal frame and
the grounding pin on each of the power outlets on the power distribution bus (check each bus if
there are multiple buses).
c. Check for the following conditions for each external device that has an attached power cord:
v Damage to the power cord.
v The correct grounded power cord.
v With the external power cord connected to the device, check for 0.1 ohm or less resistance
between the ground lug on the external power cord plug and the metal frame of the device.
14. Close the rear cover of the rack.
15. Perform the power-on procedure for the power distribution system installed in your rack. See
“Power-On Procedure with the AC Power Distribution Bus” on page 25 and “Power-On Procedure
with the DC Power Distribution Panel” on page 27.
16 7014 Model T00, and Model T42 Service Guide