Checking the receptacle for wiring errors
The receptacle the customer uses to supply power to the frames will be tested in the following steps.
Note: The following graphics represent a customer's 3-phase branch circuit IEC 60309
compliant female connectors. These graphics do not apply to Single-phase power line cords, and may
not apply if the customer used their own different connector/plug set with IBM's
cut-end power line cords.
Perform the following AC voltage checks on all of the receptacles
that the customer uses to supply power to the frame.
- Verify that the wall breaker is set to the OFF position.
- PDU power
- Carefully probe the PDU outlets to verify that all power is turned off.
- Using the digital voltage meter, check to be sure that there is no AC voltage between each phase pin and the ground/earth pin (and metal receptacle components).
- Using the digital voltage meter, check to be sure that there is no AC voltage from receptacle ground/earth to
building ground/earth (water pipe, building steel, etc.). Grounded raised floors might not be
an acceptable building ground/earth. A grounded raised floor is acceptable if the following
is true:
- It is bonded to building steel
- It is a bolted stringer design
- The stringer system is not corroded.
For metal receptacle shells or shells with metal components, check for no AC voltage from the receptacle ground/earth pin to the metal.