I have ten 26 year old 2' x 4' flourescent troffers with T12 magnetic ballasts (4 lamps & 2 ballasts each) in my basement. Over the last year or so the ballasts are all starting to fail.
I'm retrofitting the troffers over to T8 ballasts and lamps. My plan was to start tonight with the 3 ballasts I picked up today--maybe do 3 a week over the next few weekends.
I was choosing between two GE electronic models. They're in the same case. One was GE432-120RES-DIY, said "residential electronic ballast" and is Class B 120V single tap. The other was GE432MV-N-DIY, said "high-performance electronic ballast" and is Class A 120-277.
I choose the "high performance" one. The load with 4 lamps is only 0.9 A @120V as opposed to almost twice that with the regular "residential" one. (the load per lamp with the "residential" ballast was only slightly less than the existing T12 ballasts) The previous owner skimped on the electrical when the basement was finished in 1985 and the circuits tend to get full, so taking 2 A off each 15A circuit will help get the load cut down.
After tearing off the plastic on the first one, the folded up paper from GE fell out and up on reading, it states several times "This ballast should only be installed in a commercial invironment. Do not install this ballast in a residential environment."
Can anyone explain why the literature states this and why I shouldn't install this ballast in a residential basement?