Working for a critical power specialist, we were asked to carry out fixed wire testing on a complete power system at a data centre in the Thames Valley, including its busbars. The main panels could only be tested inside planned shutdown windows.
We started with a pre-start survey of every distribution board fed from the main panels. That let us build a testing schedule that slotted into the client’s critical programme.
The programme was four full shutdown days, 07:00 to 19:00, for the main panels and busbars, plus seven days of local isolations for the system’s auxiliary boards. End users were briefed in advance so they could plan around each isolation.
The client received an Electrical Installation Condition Report for the system to BS 7671.



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