DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   Electrical (http://www.diychatroom.com/f18/)
-   -   11.5 amp blender tripping 20 amp circuit breaker (http://www.diychatroom.com/f18/11-5-amp-blender-tripping-20-amp-circuit-breaker-169632/)

MidgeTenant 01-20-2013 02:13 PM

11.5 amp blender tripping 20 amp circuit breaker
 
My new Vitamix blender is rated at 11.5 amps, but twice tripped the circuit breaker when I used it for the first time a few days ago. The circuit breaker has the number "20" on the switch; I assume it's a 20 amp breaker.

I plan to talk to Vitamix about this, but would like some feedback from the likelier-to-be impartial forum visitors here: do you think I received a blender with a bad motor? Or are there circumstances in which even a 20 amp circuit might not be enough for a heavy duty blender?

Speedy Petey 01-20-2013 02:22 PM

The obvious question is are SURE nothing else is running on that circuit?

64pvolvo1800 01-20-2013 02:28 PM

Quote:

Originally Posted by MidgeTenant (Post 1097926)
My new Vitamix blender is rated at 11.5 amps, but twice tripped the circuit breaker when I used it for the first time a few days ago. The circuit breaker has the number "20" on the switch; I assume it's a 20 amp breaker.

I plan to talk to Vitamix about this, but would like some feedback from the likelier-to-be impartial forum visitors here: do you think I received a blender with a bad motor? Or are there circumstances in which even a 20 amp circuit might not be enough for a heavy duty blender?

Does the blender turn at all? Tried a different outlet? Try it without the container and empty.

micromind 01-20-2013 05:10 PM

If it's an arc-fault breaker, a 11.5 amp universal motor could very well trip it if it's fairly close to the panel and the voltage is on the high side.

Seattle2k 01-20-2013 06:37 PM

You may have a bad breaker. If you move the blender to a different circuit, does the breaker on the new circuit trip?

Billy_Bob 01-20-2013 07:13 PM

When that breaker trips, what else stops working?

What else is on that circuit and how much amperage are those things?

It is the TOTAL amperage used by ALL appliances on a circuit which causes a breaker to trip. Unlikely just one outlet is on that breaker...

dmxtothemax 01-20-2013 07:15 PM

Quote:

Originally Posted by MidgeTenant (Post 1097926)
My new Vitamix blender is rated at 11.5 amps, but twice tripped the circuit breaker when I used it for the first time a few days ago. The circuit breaker has the number "20" on the switch; I assume it's a 20 amp breaker.

I plan to talk to Vitamix about this, but would like some feedback from the likelier-to-be impartial forum visitors here: do you think I received a blender with a bad motor? Or are there circumstances in which even a 20 amp circuit might not be enough for a heavy duty blender?


Is the rating 11.5 amps the running current ?
If so the starting current could be much higher !
You need the correct type of breaker,
One with a slow trip,
these types of breakers are designed to cope with the high start up
currents of a motor.
We call them slow-blow,
I think you guys call them type 2 ?

Speedy Petey 01-20-2013 07:57 PM

Quote:

Originally Posted by dmxtothemax (Post 1098157)
You need the correct type of breaker,
One with a slow trip,
these types of breakers are designed to cope with the high start up
currents of a motor.
We call them slow-blow,
I think you guys call them type 2 ?

Which is every pretty much breaker made in the last 30+ years.

MidgeTenant 01-20-2013 08:41 PM

First, thanks to everyone for contributing responses, and I apologize for posting my question without providing enough information the first time.

The Vitamix was definitely the only appliance on that 20 amp circuit; I hooked up an extension cord to run it from a plug in the living room, so it wouldn't have to compete with the fridge in the kitchen. In each case, that living room breaker tripped when I applied more power after the blender had been on for thirty seconds or more. I was mixing up a big batch of some gooey dressing, which is a lot harder for a blender than making a light smoothie.

After the circuit breaker tripped the second time, I moved the Vitamix's extension cord to the circuit that powers the garage wall plugs. A contractor told me awhile ago that these are usually higher amperage than other circuit breakers in a house.

The garage wall plug circuit breaker didn't trip, and I finished making that dressing. When I investigated later, though, I found out that the circuit breaker amp rating was the same: 20 amps for the circuit breaker that tripped, and 20 amps for the breaker that didn't. But -- and I'll bet this is important -- the labels indicate that they're different types of breakers. The living room breaker is labeled AFCI and BRAF. The garage wall plug breaker is labeled BR120.

I gather that AFCI breakers are more sensitive than 'regular' breakers. Still, I'm surprised that an 11.5 amp breaker would trip a breaker rated for 20 amps.

FWIW: the Vitamix 5200 is a big, heavy duty machine, even though it's made for home use.

Thanks again for your help in tracking down this problem.

Speedy Petey 01-20-2013 08:50 PM

That is definitely it. Many AFCI breakers do not play well with motors. Do you really have AFCI breakers protecting kitchen receptacle circuits? If so then that is not required and not really desired.

frenchelectrican 01-20-2013 09:50 PM

Quote:

Originally Posted by dmxtothemax (Post 1098157)
Is the rating 11.5 amps the running current ?
If so the starting current could be much higher !
You need the correct type of breaker,
One with a slow trip,
these types of breakers are designed to cope with the high start up
currents of a motor.
We call them slow-blow,
I think you guys call them type 2 ?

Most of the Americiane breakers are class B or C ( more like halfway between the two ) so it pretty common beside the AFCI they are it own legand ( some are good and some are merde. ) But the GFCI's is about pretty close to our RCD's even your verison of RCD's

Merci,
Marc

MidgeTenant 01-21-2013 09:18 AM

Mystery solved! Thanks very much, Speedy Petey, and everyone else who contributed to this thread.

dmxtothemax 01-21-2013 07:34 PM

Well ! dont leave us in suspense !
What did you do ?
To resolve the issue ?

rrolleston 01-21-2013 08:49 PM

Hope he did not change a combo AFCI for his counter tops to a standard breaker instead of a GFCI

MidgeTenant 01-21-2013 10:06 PM

Maybe you'll think I'm an odd one, but I'm going to run the Vitamix from a long extension from the garage wall plugs until I hire an electrician to do something with my circuit panel. (I don't trust myself to do the job on my own.) The 20 amp kitchen circuit is on a regular, non-AFCI breaker, but it already has an 11 amp fridge running on it.

I opened the thread because I had thought something was wrong with the Vitamix's motor. I really like the machine otherwise, so if it's working the way it should I'll hold onto it.


All times are GMT -5. The time now is 11:00 AM.


Copyright 2003-2014 Escalate Media LP. All Rights Reserved