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I always knew how to do it Kerching, the question was why isolate at the mcc panel rather than the local isolator, I have been told to expect that question, the fact that someone can notice a fault and go down to the panel, when i'm away from it working on the motor, and start having a play and...

Well I've cheated on you chaps, so desperate am I to get this job I joined another forum to get maximum feedback, a fella on there did say that anyone could come along and push the delta contactor in, and that a de energised coil is not really isolation, looking at a wiring diagram for star...

Your right NozSpark, it could be a twin set, but I was under the impression it was more a health and safety question really, I'll bear it in mind though. Thanks again everyone.

Thanks chaps, Canoeboy I think you've nailed it, I should have said isolate to work on, if I only isolate at the isolator then someone sees that it's off on the BMS because a fault has appeared on screen and try to get it going remotely.

Thanks for the reply Nozspark, dunno mate, the bloke who gave me the heads up had been through a similar interview and was asked this question (it was a HR thing) and he gave the answer- lock off at the mcc- and the interviewer told him that was right but then asked why there and not the local...

Hi, I am going for an interview next week and I have been given a heads up on a few questions I will be asked. One of the questions will be about isolating a 3 phase motor, I know the answer is locked off at the mcc panel but why is that important compared to isolating from the local isolator...

As my name suggests, I am a very average spark, I've been bending metal most my life and am now going into maintenance, I have a few (probably basic) questions, I thought I would say hello first.