If they are a metal can type they are most likely full of PCB oil unless
stated otherwise on the metal cans.

I doubt they are 4 farads. More likely 4 microfarads uf.

"Ignoramus22732" wrote in message
...
Okay, all that said -- for you paranoids out there there is another
source of PCBs that _was_ commonly used in the home: Capacitors,
especially the capacitors used in electric light ballasts. Those _did_
have PCBs in them at one time. So if you're got some 30-year-old
flourescent lights hanging around you might want to take a minute to
check the ballasts. If they don't have PCBs they will say so.

How about these huge capacitors from the demolished UPS?

See

http://igor.chudov.com/tmp/capacitors/

The cup is pictured for size comparison.

Are they 4.1 farad each or they are 4.1 millifarad? They are rated for
300V. Are there PCB in them?

i