Re: We turned it on its head
"[...] yes I had forgotten to switch it from 110V back to 240V for testing"
A UK customer had a new mainframe delivered. Owing to very long production delays the supplier had upgraded it from the range's smallest UK model to its largest model. That model had to be imported from the USA. The customer was very pleased with their bargain after the long wait.
The supplier's engineers commissioned it successfully with the UK to lower USA voltage autotransformer jury rigged.
Overnight the customer's electricians commissioned the autotransformer into a permanent arrangement. On power up it was instantly clear that they had connected it backwards. Presumably giving the mainframe 4 times its expected voltage. Not sure how long they had to wait for another one to be shipped from the USA.
Biting the hand that feeds IT
