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 > 50 Amp service question

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time2roll

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Posted: 09/25/20 07:31pm Link  |  Quote  |  Print  |  Notify Moderator

43 amps is more than two air conditioners.
How much on the other side or is this a combined reading?


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Posted: 09/25/20 07:50pm Link  |  Quote  |  Print  |  Notify Moderator

jdc1 wrote:

And that 43 amps is probably on start-up.

Correct about 13amps running.


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Posted: 09/25/20 08:11pm Link  |  Quote  |  Print  |  Notify Moderator

The amp designation is for the highest voltage. Hence your 120/240V RV is 50A at 240V = 12,000 watts. Few RVs have 240V appliances so it's common in RV land to think of the power as 2*120V*50A = 12,000W.

My home has a 200A service which is also 120/240V so that's 200*240 = 48,000W or 48kW. And I have a mixture of 120V and 240V loads like all homes.


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Posted: 09/25/20 09:44pm Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Skipg wrote:

My new travel trailer has 50 amp service and two air conditioners. When running both air conditioners the draw is 43 Amps does that mean I’m almost maxed out??
What is telling you 43 amps?
There's the question we need an answer to. All else is pure speculation, with no data.


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navigator2346

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Posted: 09/25/20 09:44pm Link  |  Quote  |  Print  |  Notify Moderator

Startup on each is probably 13-15 amps and running at 8-10 amps each. If you are seeing 43 amps, could you be counting the electric element in the water heater and the charger in the inverter?

cavie

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Posted: 09/26/20 03:49am Link  |  Quote  |  Print  |  Notify Moderator

What is giving you a reading of 43 amps? 43 is way too much for 2 A/C's only. Should be 30 or less.That sounds like total amprage with other things running. 2 A/C's are not usually on the the same leg. Yes you are almost make out. At 50 amps the breaker will trip.


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Posted: 09/26/20 04:25am Link  |  Quote  |  Print  |  Notify Moderator

Sounds like there is more to the story.

OP doesn't know what 50amp service is but knows the air/cons are on one leg?

Plus as mentioned, 43 amps is way more than 2 air/con units should be pulling.


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wa8yxm

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Posted: 09/26/20 05:05am Link  |  Quote  |  Print  |  Notify Moderator

Skipg wrote:

My new travel trailer has 50 amp service and two air conditioners. When running both air conditioners the draw is 43 Amps does that mean I’m almost maxed out??

Not even close if the RV is properly wired YES if it is not.

What's the difference

30 amp service is like this Hot-120V-Neutral That's all folks (There is a 3rd wire the safety ground)

50 amp is 4 wire hot1-120v-neutral-120v-Hot2 and safety grond

I call it 50 amps at 240 volts divided

Properly wired means hot1-ac1-Neutral-Ac2-Hot2

Several other things are also divided between 1 and 2

WHY: well it's a voltage loss issue. but I don't want to type the full course today. Take my word for it please that this reduces voltage loss and makes life easier and less expensive for the electrician and park.

But it also means you can eventually use every one of those 50 amps TWICE (Practically impossible but can be done in theory) So if you are properly balanced 43 amps is about half your power.

On the other hand after the install of an inverter.... I found Camping World had moved both A/Cs to the same power leg. I fixed it.


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