flashlight
Senior Member
- Location
- NY, NY
- Occupation
- Electrician, semi-retired
While doing monthly checklist for school we work for, their super showed us a problem in one of the science classrooms--the tap water had been running blue !
Unfortunately (or fortunately) it was not doing it when we arrived, but he said it did this from time to time for about a week. A plumber had come in to see if there was any siphoning situation, found none, and then suggested he call an electrician to search for stray current.
Does anyone have any experience with this ? There would have to be current, not just voltage, for electrolysis to occur, right ? From what I remember reading about this problem at marinas, it does not take a high current to cause it. I'm not sure how to go about testing for this, besides the most obvious things (clamp ammeter around water pipe...) and to make things more difficult, the copper plumbing is not easily accessible, even right under the sink.
Would be grateful for any insight on this !
Unfortunately (or fortunately) it was not doing it when we arrived, but he said it did this from time to time for about a week. A plumber had come in to see if there was any siphoning situation, found none, and then suggested he call an electrician to search for stray current.
Does anyone have any experience with this ? There would have to be current, not just voltage, for electrolysis to occur, right ? From what I remember reading about this problem at marinas, it does not take a high current to cause it. I'm not sure how to go about testing for this, besides the most obvious things (clamp ammeter around water pipe...) and to make things more difficult, the copper plumbing is not easily accessible, even right under the sink.
Would be grateful for any insight on this !