Originally Posted by whitecrest
Yes, a watt meter is indispensable when you are making adjustments to the power system. It will tell you when current levels are too high and potentially damaging. It is also important to have the published specifications of the components you're working on. If not provided by the manufacturer, they can often be located online.
I can see the point of the Wattmeter when the ESC / motor is working combo - but here the guy has a non-working combo and a Wattmeter is no use whatsoever to him to get it working.
What he may need to do is to connect a meter to see if anything is coming out of ESC !
Personally with the price of ESC's now - is it worth trusting an ESC that you are unsure of ? My favourite 50mm EDF is in sorry state for this reason.