The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Industrail Control Panel bonding per 409.108
by sparkyinak
Yesterday at 06:29 PM
Calling all Non-US members!! (Non-US only)
by aussie240
12/07/16 02:39 AM
Photo Upload Tutorial
by DanK
12/06/16 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 10
sparkyinak 9
Texas_Ranger 8
Potseal 6
Who's Online
0 registered (), 78 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#164490 - 06/04/07 03:51 PM Capacitor keeps going bad?
sid123456 Offline
Member

Registered: 01/18/05
Posts: 72
Loc: Florida
A friend of mine called me, asking me why his customer's pool pump capacitor keeps going bad every 3 to 6 months. I told him that it was possibly a surge or a loose return path. I haven't come across this myself.

Any ideas?

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#164500 - 06/04/07 04:23 PM Re: Capacitor keeps going bad? [Re: sid123456]
NJwirenut Offline
Member

Registered: 09/15/01
Posts: 816
Loc: Bergen County, NJ
Check the centrifugal switch for binding or welded contacts.

If the cap doesn't get switched out of the circuit once the motor is up to speed, it will burn up quickly.

Top
#164510 - 06/04/07 06:04 PM Re: Capacitor keeps going bad? [Re: NJwirenut]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
Also check the centrifugal actuator for the switch, If that binds up it won't open the switch.
_________________________
Greg Fretwell

Top
#164521 - 06/05/07 03:05 AM Re: Capacitor keeps going bad? [Re: gfretwell]
RODALCO Offline
Member

Registered: 12/08/05
Posts: 863
Loc: Titirangi, Akld, New Zealand
And check the voltage rating of the capacitor too. To be on the safe side it should be about 1.5 times the nominal mains voltage.
For 230 Volts a 400 V cap.
For 120 Volts a 200 or 250 V cap.
_________________________
The product of rotation, excitation and flux produces electricty.

Top
#164539 - 06/05/07 06:43 PM Re: Capacitor keeps going bad? [Re: sid123456]
wendel Offline
Member

Registered: 08/07/04
Posts: 57
Is this a PSC motor? The capacitor would remain in the circuit. Could low voltage cause excessive current draw and wear out the capacitor sooner?

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals