Question How many amps does your DP PULL

[Chuggs]

Ok Chuggs, flog me if I am wrong. I am not the most electrically savvy, but I believe 50A shore power gives you 50A at 120V on each leg. You should have energy to spare. Beware it may not be as much on the generator, depending on its size (10kw = 83 A, 41.5 on each leg).

No floggings from here forth to eternity.

 

[Chuggs]

We have two Victron MultiPlus inverters as well.

View attachment 25163

Dang that’s pretty! Love Victron porn. Is that a custom rack mount for double inverters?

 

[Joe Dutchstar]

Dang that’s pretty! Love Victron porn. Is that a custom rack mount for double inverters?

This is the Factory Li Ion option. Agree that it looks nice

 

[Wemustrv]

just to help avoid confusion you have a total of 50 amps available between the two legs. Each leg can handle 50 amps however the total draw for extended period is 50 amps not 100.

50 Amp RV Electrical System vs 30 AMP RV Electrical System​

• A 50-amp RV system provides 240 volts of electrical power, split into two 120-volt circuits, each with a separate hot wire (L1 and L2). The total amperage available is 50 amps, with 50 amps available on the two hot legs. This allows for 12,000 watts (50 amps x 240 volts) of electrical power.
• A 30-amp RV system provides 120 volts of electrical power with a total amperage of 30 amps available. This results in 3,600 watts (30 amps x 120 volts) of electrical power.
• Note that a 50-amp RV system has more outlets and wiring than a 30-amp one. 50-amp plugs can support multiple electrical devices, including high power-consuming ones (refrigerators, air conditioners, and electric ovens).

 

[MemoriesByTheMile]

Can you clarify why you say more than 50A cannot be drawn for extended periods of time?
IF the power draw is BALANCED across the 2 hot legs, a total of 100 amps at 120v can be pulled for prolonged amounts of time. My knowledge on this is - the need to be balanced is due to sharing a common/neutral which is the same sized wire gauge as each hot leg. But when power is balanced, the opposing legs are each of of phase, thereby cancelling each other out on the neutral, IF they are balanced.
For instance

• if leg 1 is pulling 20A and nothing is on leg 2, the neutral will show the full 20A flowing back
• If leg 1 is pulling 20A and leg 2 is pulling 20A, then each leg is allowing 20A to flow back on the neutral, but the 2 legs have opposing phases, so the neutral will show 0A in a perfect world
• If leg 1 is pulling 20A and leg 2 is pulling 15A, then the neutral will only show the amount of power that opposing phases are not cancelling, or 5A
• So, if leg 1 is pulling 45A and leg 2 is pulling 45A, this is a total of 90A being pulled on the hot, but neutral will show 0A. This can be done for prolonged periods of time.

This same principle of loading balancing is also in place within a typical sticks and bricks, 2 hot legs that share a neutral.

 

[redbaron]

just to help avoid confusion you have a total of 50 amps available between the two legs. Each leg can handle 50 amps however the total draw for extended period is 50 amps not 100.

50 Amp RV Electrical System vs 30 AMP RV Electrical System​

• A 50-amp RV system provides 240 volts of electrical power, split into two 120-volt circuits, each with a separate hot wire (L1 and L2). The total amperage available is 50 amps, with 50 amps available on the two hot legs. This allows for 12,000 watts (50 amps x 240 volts) of electrical power.
• A 30-amp RV system provides 120 volts of electrical power with a total amperage of 30 amps available. This results in 3,600 watts (30 amps x 120 volts) of electrical power.
• Note that a 50-amp RV system has more outlets and wiring than a 30-amp one. 50-amp plugs can support multiple electrical devices, including high power-consuming ones (refrigerators, air conditioners, and electric ovens).

Most rvs are not 240v. They are 100amps of 120v.

You can safely pull 98amps of 120v as long as each leg is limited to 49amps.

you can also do this all summer long without an issue. Ask me how I Know….been doing it for 15 years.

The circuit we plug into is a 50amp 240v, which is provided by 2 circuits of 50 amp 120v.

The Rv breaker panel does not have any breakers that span both legs, so each breaker is assigned Line 1 or Line 2.

When connected to 50amp 240v and used as describe above, you get 100amp 120v.

A 30amp plug has 1 line of 120v, so you lose 70amps of usable load in your Rv.

The dog leg adapters combine line 1 to line 2 so that all of your breakers have power. You must manage the draw to not exceed 30amps total.

 

[MemoriesByTheMile]

We have two Victron MultiPlus inverters as well.

View attachment 25163

Very nice!

 

[Kevin D Pem]

just to help avoid confusion you have a total of 50 amps available between the two legs. Each leg can handle 50 amps however the total draw for extended period is 50 amps not 100.

50 Amp RV Electrical System vs 30 AMP RV Electrical System​

• A 50-amp RV system provides 240 volts of electrical power, split into two 120-volt circuits, each with a separate hot wire (L1 and L2). The total amperage available is 50 amps, with 50 amps available on the two hot legs. This allows for 12,000 watts (50 amps x 240 volts) of electrical power.
• A 30-amp RV system provides 120 volts of electrical power with a total amperage of 30 amps available. This results in 3,600 watts (30 amps x 120 volts) of electrical power.
• Note that a 50-amp RV system has more outlets and wiring than a 30-amp one. 50-amp plugs can support multiple electrical devices, including high power-consuming ones (refrigerators, air conditioners, and electric ovens).

Would like to visit that site!!!

 

[Wemustrv]

Well,80 amps.

Explain the 80 amps. The circuit is rated at 50 amps. The total available amperage to the panel is 50 amps whether it is line one or two. If you exceed the 50 amps the main should trip.

 

[Kevin D Pem]

Breakers rated at 80% duty cycle! Notice the two 50 amp breakers are tied together? That keeps a 220vac load from having a hot wire if you trip it.

So 50amps per leg 100 amps Total. Times 80(80%) equals 80 amps. If neither leg exceeds the breakers limit!

That is why you should strive to balance the legs.

 

[redbaron]

Explain the 80 amps. The circuit is rated at 50 amps. The total available amperage to the panel is 50 amps whether it is line one or two. If you exceed the 50 amps the main should trip.

The circuit is rated 50 amps at 240v, which is the same thing as 100amps at 120v. Line 1 & Line 2 are each 120v.

Each breaker can supply 120v @ 50amps. When used as 120v appliances, you get 100amps at 120v, or 12,000 watts of power.

That is why a 12.5Kw generator is required to power the RV the same as when connected to shore.

If you are using a 30amp plug, then you only have 3,600 watts of power available.

A single 50 amp, 120v Line will be 6000 watts of power.

 

[redbaron]

Breakers rated at 80% duty cycle! Notice the two 50 amp breakers are tied together? That keeps a 220vac load from having a hot wire if you trip it.

So 50amps per leg 100 amps Total. Times 80(80%) equals 80 amps. If neither leg exceeds the breakers limit!

That is why you should strive to balance the legs.

This is why campgrounds so often have bad breakers. Many, like myself, will commonly use 90-95% of the load. This wears out the breakers very quickly.

Plus all the turning on/off as we break camp and setup camp.

 

[MemoriesByTheMile]

For a 50A hookup at home base, we have a separate disconnect switch at the outlet so the breaker isn’t being flipped on and off regularly. The breaker isn’t adjacent to the outlet.
I figure the only reason campgrounds don’t use disconnect switches is they either don’t know better or they are being “penny wise and pound foolish” and like replacing breakers on a regular basis.

 

[newmarokie]

Let's add another twist. Yes, campgrounds have a 50 amp double pole breaker. 50 times 240 = 12,000 watts of power. Like Kevin says and I believe the NEC says, circuits should be sized to run at 80% of rating. My 19 Dutch Star has an 8k Onan generator. It has a 35 amp double pole breaker. But it is pure 120v. If you measure across the lines it measures zero. Each line to neutral measures 120v. The legs can be tied together to make 70 amps of 120v but not split to make 35 amps of 240. I am still not completely certain how this all fits together and works(flawlessly I might add). I know the genny has the two lines and two neutrals going to the transfer switch that bond together there. I have not determined if the main line going to the panel has a oversized neutral to help compensate for the 240 volt pedestal power being out of balance. I know with both ACs going and the inverter/charger going full tilt, the system is definitely out of balance. About thirty amps on the leg with one AC and the inverter, about fourteen on the other. Maybe that amount of imbalance is with in the limits of the neutral? Maybe the panel is balanced well enough that you can't hardly overload the neutral?

 

[redbaron]

Let's add another twist. Yes, campgrounds have a 50 amp double pole breaker. 50 times 240 = 12,000 watts of power. Like Kevin says and I believe the NEC says, circuits should be sized to run at 80% of rating. My 19 Dutch Star has an 8k Onan generator. It has a 35 amp double pole breaker. But it is pure 120v. If you measure across the lines it measures zero. Each line to neutral measures 120v. The legs can be tied together to make 70 amps of 120v but not split to make 35 amps of 240. I am still not completely certain how this all fits together and works(flawlessly I might add). I know the genny has the two lines and two neutrals going to the transfer switch that bond together there. I have not determined if the main line going to the panel has a oversized neutral to help compensate for the 240 volt pedestal power being out of balance. I know with both ACs going and the inverter/charger going full tilt, the system is definitely out of balance. About thirty amps on the leg with one AC and the inverter, about fourteen on the other. Maybe that amount of imbalance is with in the limits of the neutral? Maybe the panel is balanced well enough that you can't hardly overload the neutral?

The 10kw and 12.5kw are 240v.
-edit: I don't know why I am getting conflicting information on the 8kw..some are made 240v, some are made 120v single phase, with separate neutrals and cannot be 240v---its an odd setup.

https://www.cummins.com/generators/onan-qd-8000