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 > breaker keeps blowing

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jdc1

Rescue, Ca

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Posted: 07/06/20 04:27pm Link  |  Quote  |  Print  |  Notify Moderator

AC = 13amps
Converter = 8amps
Water heater = 13 amps

time2roll

Southern California

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Posted: 07/06/20 04:45pm Link  |  Quote  |  Print  |  Notify Moderator

panteramatt wrote:

The extension cord I used was very heavy duty.
S/B #10 wire minimum.


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Lwiddis

Camping near Pearsonville, CA

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Posted: 07/06/20 04:59pm Link  |  Quote  |  Print  |  Notify Moderator

Read about RV electric...the basics.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watts solar-parallel & MPPT, Trojan T-125s. TALL pole for flags. Prefer USFS, COE, BLM, NPS, TVA, USF&WS, state & county camps. Bicyclist! 14 year Army vet - 11B40 then 11A - (MOS 1542 & 1560)


Edd505

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Posted: 07/06/20 07:40pm Link  |  Quote  |  Print  |  Notify Moderator

panteramatt wrote:

Sjm9911 wrote:

What kind of camper do you have and what does it normally run at? Is it a 50 amp plugged into a 30 amp? My TT will run ac, fridge ( just one), ellectric water heater, and microwave etc just fine. Are the fridges built in or did you add them? You can always run a hevey duty extention cord for extras to your power pedistal. What type of cord did you use?


Its a 32ft COugar TT 30 amp. It has a built in refridge indoor and outdoor. The extension cord I used was very heavy duty.

The longer you go the heaver you need, here is a standard 30Amp RV extension.
https://www.lowes.com/pd/CAMCO-PowerGrip........eavy-Duty-General-Extension-Cord/3455554


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pianotuna

Regina, SK, Canada

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Posted: 07/06/20 11:53pm Link  |  Quote  |  Print  |  Notify Moderator

Hi,

As the various items are turned on, voltage may become lower and lower. The air conditioner may draw more and more watts as the day gets hotter. I've measured mine at 1900 watts. (Dometic 13500 btu)

1900/107 =~ 17.76 amps at my comfort zone of 107 volts.

24 amps continuous is what a 30 amp service can handle.

24- 17.76 = 6.24 amps for all other continuous loads. (about 667 watts)

At campgrounds when every one is running their roof air, and other loads, there may be voltage drop. It behooves the owner to monitor voltage. As the voltage drops there is much more risk of melting plugs.

My comfort zone is no lower than 107. I keep in my comfort zone by added an autoformer.


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My ride is a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

BB_TX

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Posted: 07/07/20 08:37am Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

Hi,........

24 amps continuous is what a 30 amp service can handle.
........

If you check manufacturer circuit breaker trip curves, you will see that circuit breakers are rated to run at full rated load indefinitely. Only after they exceed that current rating do they begin to trip. Slightly exceeding the printed rating they will trip after a few seconds or a few minutes. The more the printed current rating is exceeded, the faster they trip.

It is recommended that the expected design load on a circuit breaker to be less than the max rating. But that does not mean it will trip at less than the max rating.

breaker trip curves

panteramatt

Salem, NJ

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Posted: 07/07/20 08:57am Link  |  Quote  |  Print  |  Notify Moderator

Thanx guys I learned a lot. Seems like my system is working just fine I just overloaded it which i suspected in the first place. If I'm bumping my a.c. I will run my water heater on propane from now on.

pianotuna

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Posted: 07/07/20 09:49am Link  |  Quote  |  Print  |  Notify Moderator

BB_TX wrote:

pianotuna wrote:

Hi,........

24 amps continuous is what a 30 amp service can handle.
........

If you check manufacturer circuit breaker trip curves, you will see that circuit breakers are rated to run at full rated load indefinitely. Only after they exceed that current rating do they begin to trip. Slightly exceeding the printed rating they will trip after a few seconds or a few minutes. The more the printed current rating is exceeded, the faster they trip.

It is recommended that the expected design load on a circuit breaker to be less than the max rating. But that does not mean it will trip at less than the max rating.

breaker trip curves


In homes the electrical code is 80% of rated current. That's 12 amps for a 15 amp. But of course, since RV's are "plug in devices" they are exempt.

It is easy, in our power hungry RV's to exceed 30 amps.

Low voltage exacerbates the problem and is endemic in RV parks.

You can fix the problem with technology, or you can suffer in the mid summer heat by turning off the air conditioner, to protect if from damage. Probably best to not use the microwave--but those at least are no longer expensive.

pbohart

Portland, Oregon

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Posted: 07/14/20 11:51am Link  |  Quote  |  Print  |  Notify Moderator

Hey. I know this topic has been thoroughly discussed, but your load does not sound too large for a 30amp breaker.

I was having a similar problem with my 30amp breaker popping under reasonable load. I replaced the breaker and it fixed my problem.

I am not an expert, but seems as if the switches get worn and over time will pop under lighter and lighter loads.

FYI.


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enblethen

Moses Lake, WA

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Posted: 07/14/20 02:10pm Link  |  Quote  |  Print  |  Notify Moderator

pbohart: You are correct. The springs in the breakers running hot can loose their tension.


Bud
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