30 amp VS 50 amp

[Pete Masterson]

30 amp service will be barely adequate for 2 ACs. If you're replacing
one, try to get one of the "high efficiency" models that draw 10 amps
instead of the more typical 14-15 amps.

The problem with 30 amp service is that the AC will spike to 25-30
amps when the compressor kicks in before it drops back to the normal
14-15 amp draw. The 10 amp models only spike to about 20 amps.

When I was plugged into a 30 amp service, I was successfully running
two ACs (both 10 amp high efficiency models) -- then the refrigerator
went on and then the lights went off....

So, load management is a serious issue when running dual ACs on 30 amps.

Some of the early 'birds had dual 30 amp cords, so it might be
possible to convert yours to 50 amp service.

The 30 amp cords have 3 pins on the plug and the 50 amp cords have 4
pins. In RV setups, the 50 amp service is split into two 50 amp/120
vac legs -- you'll need to do some internal rewiring of your
distribution panel... and you may want to install "mains" for the
inbound cord if you convert to 50 amp service -- but it's probably
doable if you're conversant with electrical matters or can get some
help from a competent electrician who's familiar with RV wiring
techniques.

===============================================
Pete Masterson, Author of
Book Design and Production: A Guide for Authors and Publishers
Aeonix1@...
Aeonix Publishing Group http://www.aeonix.com
===============================================


On Jul 7, 2007, at 8:25 AM, bubblerboy64 wrote:

> My 1973 FC has a 30 amp service, or at least that's what is stamped on
> the shore cord. This bus has two air conditioners front and back.
> <snip>

> Am I going to be ok with 30 amp service? This bus was
> delivered new with two air conditioners I am pretty certain but every
> RV I have ever seen with two airs was always 50 amps. And I guess I
> could be wrong but there are two there now anyways. What if anything
> needs to be done?



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