I had an intermittent mcb a proteus board the other day.
That was;- you turn it on, one time and it worked, try it again - and it did not. You could try toggling the mcb switch a couple of times. Other than that I would not advise you do any further testing in this area yourself.
Too dangerous in there for some one with limited experience. Especially the board that you have - there are huge live busbars running all over the place in them.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local