IBM H Series Installation And Service Manual page 33

12. Perform the following checks on each device that has its own power cables:
a. Check for damage to the power cord.
b. Check for the correct grounded power cable.
c. With the external power cable connected to the device, check for 0.1 ohm or
less resistance between the ground lug on the external power cable the
metal frame of the device.
13. Install the covers.
Chapter 1. Reference Information
1-17