30 amp vs. 50 amp question

[kopy_kat]

I have a spot reserved at an Rv park, but all they had available was a 30 amp hookup.

So...

-do I still put my 50 amp EMS In line after the 30/50 converter?

-I know I can’t run both a/c units, but can I still run the heat pump?

So much to learn with this new unit!

Thanks, Larry

[CA_Traveler]

valhalla360 wrote:

CA Traveler wrote:
EMS and heat pump OK, you just can't exceed the 30A pedestal CB limit with all of your loads.

Actually, you can hit 30A for a few seconds but the circuit is limited to 80% of the rating for continuous loads (ie: 24amps).

This explains a lot of burnt up sockets and cable ends. For a couple seconds, pushing to 30amps when the air/con compressor kicks on, won't be enough time to overheat anything but 4hr of continuous draw right at the 30amp limit and it can burn up a plug (particularly if it's an old and worn outlet).

Good point, 30A or more like motor starting. The NEC recommends 80% load for sustained use which seems to be largely ignored by RVers.

[valhalla360]

CA Traveler wrote:
EMS and heat pump OK, you just can't exceed the 30A pedestal CB limit with all of your loads.

Actually, you can hit 30A for a few seconds but the circuit is limited to 80% of the rating for continuous loads (ie: 24amps).

This explains a lot of burnt up sockets and cable ends. For a couple seconds, pushing to 30amps when the air/con compressor kicks on, won't be enough time to overheat anything but 4hr of continuous draw right at the 30amp limit and it can burn up a plug (particularly if it's an old and worn outlet).

[cavie]

A/C and Heat pump is the same unit. A heat pump is just a phrase for a reversing valve to reverse the direction of the gas in an A/C system.

[pianotuna]

Ed_Gee wrote:

pianotuna wrote:
Yes.

Shore power-->adapter-->ems-->rv

Limit your loads to 24 amps if that is possible.

If you are lucky enough to have a hybrid inverter/charger, then turn on the load support feature.

Not really --- You'll do it this way:
shore power pedestal >> eMS >> adapter >> rv cable.

He is plugging in a 50 amp rv to a 30 amp shore power. Therefore the adapter comes first.

[CA_Traveler]

time2roll wrote:

Ed_Gee wrote:
Not really --- You'll do it this way:
shore power pedestal >> eMS >> adapter >> rv cable.

How you going to push a 50a EMS into a 30a pedestal?

Not much escapes time2roll. :B

[time2roll]

Ed_Gee wrote:
Not really --- You'll do it this way:
shore power pedestal >> eMS >> adapter >> rv cable.

How you going to push a 50a EMS into a 30a pedestal?

[Ed_Gee]

pianotuna wrote:
Yes.

Shore power-->adapter-->ems-->rv

Limit your loads to 24 amps if that is possible.

If you are lucky enough to have a hybrid inverter/charger, then turn on the load support feature.

Not really --- You'll do it this way:
shore power pedestal >> eMS >> adapter >> rv cable.

[kopy_kat]

Thanks for the responses.

Larry

[Lwiddis]

Make a chart of starting and running amps.

[Edd505]

I have been able to run everything inside on 30amps, including the fireplace and microwave at the same time. Like you said just not two A/C's.

[CA_Traveler]

EMS and heat pump OK, you just can't exceed the 30A pedestal CB limit with all of your loads.

[Lwiddis]

You can live well on 30 amps!

[pianotuna]

Yes.

Shore power-->adapter-->ems-->rv

Limit your loads to 24 amps if that is possible.

If you are lucky enough to have a hybrid inverter/charger, then turn on the load support feature.