| Author | Message | ||
| R.C.Bishop (Chuckllb)
Registered Member Username: Chuckllb Post Number: 1040 Registered: 7-2006 Posted From: 70.212.234.136 Rating: N/A |
For a couple of years, I have been "plagued" with one of the two breakers on our Onan NHH 6500 popping... from time to time. I have checked the draw on both legs going into the main panel; (in fact even switched them a couple of times) and find nothing of any real significance that would make it happen. Always the same breaker.(bad breaker?...how would one check that?) Switched the loads around several times, but, alas, seems to make no difference!   Mystified...any suggestions? (thought I had all the answers... ) Thanx! RCB | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1814 Registered: 10-2003 Posted From: 71.58.71.157  Rating: N/A |
can you remove the breakers and reverse positions? | ||
| Tom Caffrey (Pvcces)
Registered Member Username: Pvcces Post Number: 1313 Registered: 5-2001 Posted From: 65.74.67.140 Rating: N/A |
If there is a bad connection at the breaker, it will develop heat and trip below it's rating. If it's warm right after it trips, I would change it. Tom Caffrey PD4106-2576 Suncatcher Ketchikan, Alaska | ||
| Paul Lawry (Dreamscape)
Registered Member Username: Dreamscape Post Number: 613 Registered: 5-2007 Posted From: 64.40.209.21  Rating: N/A |
A breaker can be weak, even new sometimes. Change it out, not much cost, and forget about it! The contacts are probably arched so bad it's causing it to trip. There is no way to check one without damaging the case. Paul | ||
| FloridaCliff (Floridacracker)
Registered Member Username: Floridacracker Post Number: 422 Registered: 7-2004 Posted From: 97.101.146.143 Rating: N/A |
RC, Since you have already amp clamped them and they are almost the same, Shoot them with an infrared temp detector and see if any difference. I would suspect you will find the one tripping to be hotter under the same load, . Either way you going to have to replace it, just nice to know why, or maybe just a weak breaker. I have replaced plenty of them at work. | ||
| Tom Christman (Tchristman)
Registered Member Username: Tchristman Post Number: 159 Registered: 1-2006 Posted From: 66.218.33.156 Rating: N/A |
Strange as it sounds, if the clamping screw to the output wire is not as tight as can be, it will create extra resistance and cause the breaker to trip. You should check all breakers to make sure the screw on the output wire is tight since the bus is vibrating going down the road. Good Luck, TomC | ||
| R.C.Bishop (Chuckllb)
Registered Member Username: Chuckllb Post Number: 1041 Registered: 7-2006 Posted From: 75.210.128.38 Rating: N/A |
Today I removed both breakers....filthy and most probably corrosion is the culprit. The leads are typical terminal ends and are not affixed with a screw-in connection. Think I'll do as suggested and just replace both breakers. (also note both were Made in Mexico...have no idea how long ago) Should have done this a couple of years ago...but nooooo. I had to start from the "other end"... Many thanx for the advice....and suggestions. What a great board!!! (thanx,Ian!) RCB | ||
| R.C.Bishop (Chuckllb)
Registered Member Username: Chuckllb Post Number: 1044 Registered: 7-2006 Posted From: 70.212.217.135 Rating: N/A |
PPL...in Houston, has the Onan breakers I need....and many more, from what I am told. A post above indicates "not much cost"....doubtful, at least in my definition....these are $35++ shipped...after a healthy discount. Understand "newer models" are in the $50 range...before shipping. Typical Onan!! Thanx for the "help". Will post results after I receive the new breaker. RCB |