Want to run a line from cellar to upstairs to use as indicator for well...thought i could get power off one of the 110 lines going to control box when pressure switch calls for water,and use neutral wire in outlet nearby as other wire...just thought something such as nightlite would be a good indicator to let me know pump has kicked on and so i can tell when it goes off.....question is will tapping into one of 2 lines for run motor interfere with pump...even if only a small nightlite type draw....we have limited water supply and has run well dry a few times and believe that put our first pump in an early grave so want something to help us know if pump is on.....would using a voltage tester with small indicator lite be better...would have to extend leads to bring upstairs....can go straight up so less than 8 feet of wire....any thoughts appreciated.