there are mechanics that allow water to disrupt electricity, underwater melding is done not with just electricity but the system is designed specifically, you can use water to even avoid death by lightning which was proven scientifically, water can disrupt electric discharge, and by disrupt I don't just mean nullify but simply interfere with it's flow, if you splash water onto electric stuff you cause a disruption in electric flow leading to fails or power, fires even, and other things, you should finally learn that one word has more meanings that just the obvious, a word "point" for example has more meanings that 1, "Disrupt" is also not a single meaning word, and it does not mean nullify.