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4hv.org :: Forums :: General Science and Electronics
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Capacitor mounting stud question

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dmg
Fri Oct 01 2010, 10:32PM Print
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
I have this capacitor, and it has a mounting screw on the buttom, with a plastic nut, that goes around a 3/8" threaded rod.

I tried messuring between the terminals to see if there is any electrical contact between the stud and the terminals of the capacitor, but all ive gotten is false readings with no clear answer,

this capacitor still works and charges up, but I wonder if that stud is connected in any way to the terminals.
does anyone have capacitors like this one?
1285972347 2628 FT0 Semicap 001

1285972347 2628 FT0 Semicap 002
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Proud Mary
Fri Oct 01 2010, 10:50PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
The threaded mounting stud is connected to the negative pole.
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dmg
Fri Oct 01 2010, 10:56PM
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
Thank you for your help Mary,

I was going to mount this capacitor directly to a metalic frame, but now I will mount it on a plexiglass platform first before that.
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Proud Mary
Fri Oct 01 2010, 11:06PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
There are insulated through-hole chassis mountings for this type of capacitor, but your way will do just as well if you don't want the negative pole connected directly to a grounded chassis.
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teravolt
Sat Oct 02 2010, 03:37AM
teravolt Registered Member #195 Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
Hi Gatedbreakdown and Proud Mary, the mounting stud is floating and the reading is false. if there is no dead short to the negitive the stud is just a mounting stud. I have recieved assemblies with them mounted on aluminuim.
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dmg
Sat Oct 02 2010, 04:44AM
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
Makes sence, well, either way, I already had made the piece of plexi for isolation, and it fits just fine. but its nice to know in the future about these type of capacitors,

Thank you for your help everyone.
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