The power sockets are by default switched on, the only switch the driver has access to is the emergency isolate switch in each coach which kills everything except the doors (which run on the battery). There is a huge wall of switches behind the driver but that is sealed but has a glass screen so the driver can see what is tripped
The 22k/ICR operates its onboard systems very like an airplane. If there is a technical fault, non critical systems are shed. The first system on the list to go are the power sockets. If that isn't enough it works through other systems such as the catering boiler. The safety critical systems run off the battery if everything else fails
At first when the ICR's where delivered the shedding order was all over the place and the heating and AC was the first to be chopped but the power sockets remained on. Clearly that was not acceptable
Curiously most of the reports are on morning trains towards Dublin which suggests a technical fault picked up the day before or that someone at maintenance is failing to reset the circuit breakers
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