Community Forums

Bottombare · 10-24-2021, 10:06 AM

I'm new to the motor coach scene, so I'm picking up info add we go.

I understand that if the rv has 2 roof a/c units, it's generally a 50A setup.
Our 97 dolphin has 2 roof units, but the wired in cord has a 30A plug?

Usual, unusual, or aberrant?

Ljwt330 · 10-24-2021, 10:26 AM

Quote:

Originally Posted by Bottombare

I'm new to the motor coach scene, so I'm picking up info add we go.

I understand that if the rv has 2 roof a/c units, it's generally a 50A setup.
Our 97 dolphin has 2 roof units, but the wired in cord has a 30A plug?

Usual, unusual, or aberrant?

I found a brochure for your coach. It states there is an "Intellitec" system that runs two A/Cs on 30 amps. I would assume then that your coach is OEM 30 amp.

https://www.rvroundtable.com/wp-cont...inBrochure.pdf

krivanj · 10-24-2021, 11:15 AM

On my previous 97 Holiday Rambler, it was set up with a switch to use one or the other. I rewired it to have an extra cord go to the 20A outlet in the box so I could run both.
You could check out the new easy start systems on this website. They let the compressor start without the big surge in amps, so you could run 2 acs on 30A

Mich F · 10-24-2021, 11:24 AM

Quote:

Originally Posted by krivanj

On my previous 97 Holiday Rambler, it was set up with a switch to use one or the other. I rewired it to have an extra cord go to the 20A outlet in the box so I could run both.
You could check out the new easy start systems on this website. They let the compressor start without the big surge in amps, so you could run 2 acs on 30A

Just as an "aside", there are campgrounds where you're not supposed to run more than 1 cord to the power pedestal. I'm in one of those campgrounds now and going to another with the same "rule" Tuesday. I have no idea if they ever enforce their rule.

m.elliott63 · 11-02-2021, 02:55 PM

I have a 1998 Sea Breeze that has 2 AC units and is 30amp. I preplaced both my Dometic Brisk Air with new Brisk Air II Evolution units recently when replacing the roof membrane. I also installed soft starts. I can run both AC units at the same time now drawing around 25-27 amps but can not run anything else except the converter/charger. Your Dolphin is most likely 30amp.

Dolphon35 · 11-02-2021, 03:06 PM

We also have a 97 Dolphin with 2 roof A/C units. The coach is 30 amps with an intellitec system. We can run both A/C units if nothing else is pulling a significant load. The intellitce system will start shutting down circuits when you start pulling to many amps including one of the a/c units if required.

THenne1713 · 11-02-2021, 08:24 PM

Varied w/ GEN size/ RV MFR, but 2nd air Option was 5500W GEN which had a 30a and separate 20a Circuit Breakers; for Shore line use, the 20a had a separate Transfer Switch and 20a cord that ONLY fed the 2nd Air Unit; you ONLY plugged in the 30a& 20a if shoreline available and 2nd unit needed? Have read that MANY CG did not have 50a... that is "newer" in life of RV camping? There may even be a 30/20/50 Dogbone, so that both would Now plug to a 50a?

THenne1713 · 11-02-2021, 08:52 PM

rE: INTELLITEC models, (I can only assume that vintage), OPTION might have run 1-unit until satisfied, THEN after unit-1 shut off, then start Unit-2 if needed; (or) could use a timer, 10 or 30-minutes each unit, rotating back/ forth, as needed? There maybe other options in sequence, but not sure if EASY START was even an option in those days?

donr103 · 11-02-2021, 08:55 PM

I have 2000 southwind.. 30amp 2 roof a/c 5500 watt gen... intellitec system.. the norm..
But what I would like to know.. when is last time you flushed brakes ??
Good luck and let us know what you did and maybe better members then me will help you

SeaBreazer · 11-03-2021, 01:23 PM

My unit had two a/c units from the factory it I originally had a intelitic unit installed. The previous owner removed the intellitec unit and installed a heavy duty extension cord to the wiring for the second unit. Also the 110 plugs in the bedroom are also plugged into that circuit. I have rewired the unit with a 50 amp service. And upgraded my distribution panel to 50 amp. It was a project well worth the time and money.

ArtJoyce · 11-03-2021, 03:20 PM

Quote:

Originally Posted by krivanj

On my previous 97 Holiday Rambler, it was set up with a switch to use one or the other. I rewired it to have an extra cord go to the 20A outlet in the box so I could run both.
You could check out the new easy start systems on this website. They let the compressor start without the big surge in amps, so you could run 2 acs on 30A

That is normaly not a good idea. Most of the time the post is wired with the guage of the highest amp out breaker, not the sum of all the breakers. So if the highest breaker is 30 amps they ran 10 guage wire to the post. So if you run off the 30 amp and 20 amp and you max out your amps you could be melting the insulation under ground.

twinboat · 11-03-2021, 04:26 PM

Quote:

Originally Posted by ArtJoyce

That is normaly not a good idea. Most of the time the post is wired with the guage of the highest amp out breaker, not the sum of all the breakers. So if the highest breaker is 30 amps they ran 10 guage wire to the post. So if you run off the 30 amp and 20 amp and you max out your amps you could be melting the insulation under ground.

How can that happen ?

Do you think they ran 10 gauge wire from a breaker that would allow that ?

Where do you camp where MOST of the wiring is built below electrical code, I won't go there.

If the power post has a 20 and a 30 amp outlet, it's wired for it. It more likely that it's feed with a 100+ amp circuit and daisy chained to other power posts. Who would run 10 gauge cable to each post.