Whenever I run my drier...It runs for about 5 min. then blows breaker both drier and box 30amp.
Sounds like you may have a weak breaker or under size conductors. For 30A you need at least 10 awg conductor. Did this help?
By the way, Most dryers are 50 Amp. Are you trying to run a 50A dryer using only 30 A breaker and conductor. Check it out to be sure.
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SOURCE: Main breaker tripping
replacing the main is a possibility and i saw someone suggestion to ck load on each leg of power , also a good idea but one thing i have also seen do this is a loose or corroded connection in the meter base or disconnect which causes a process called electrolysis that is a flaking away of the conductor itself in the meter base or disconnect feeding the panel main breaker and causing heat build up internal to breaker and making it trip but if you replace the main that is the time to check all these connection and it would not hurt to apply a little no lock or some other brand of oxidation inhibitor
SOURCE: Looking for 2 15amp single pole pushmatic circuit breakers.
A Google search for "15 amp pushmatic" turned up several links. Here's one for a retailer with new ones and an eBay store with cheaper prices (maybe pullouts):
http://www.aplussupply.com/break/push/push.htm
http://stores.ebay.com/Sparkys-Place_Pushmatic-Categories_W0QQfsubZ10975954
Did you also check the big-box stores like Home Depot or Lowe's or electric suppliers in your area?
SOURCE: gfci breaker for spa
gfci's are designed to trip if they receive voltage on there ground/neutral side, therefore my vote is for Smithbrother I would say there is probably a partial short somewhere in you system.
SOURCE: 50 amp GFCI breaker trips after spa runs for 45
More than likely, it's the element. They begin to 'leak' small current as they get old and this will trip the GFCI
If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c
SOURCE: Breaker trips when running a small dehumidifier alone on circuit
the breaker is getting weak and won't hold the load, assuming that nothing else is on the line. if it trips immediately u could have a short.
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