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Can I use a 50 amp connection for my 30 amp RV?

ZZSPIRAL1
Explorer
Explorer
Probably a dumb question. I locked up a reservation at SILVER STRAND SB, CA. Let me just say reservations for 5 nights in early July on the beach is tough, so I was in a hurry. Anyway, Reserve America shows all of their sites as 50 amp, but my trailer is 30 amp. Two questions for the green RVer known as me.

1. Does 50 amp generally mean they can provide 30 amp from the same site?

2. Is there an adapter of some sort that's safe to use for conversion?
39 REPLIES 39

camperpaul
Explorer
Explorer
ChopperBill wrote:
Never recall needing a 50-30 adaptor, many times a 30-50 and I have owned both 30 & 50 amp RV'S.

When there is a 50 Amp outlet, I always use it with a dog-bone adapter for my 30 Amp trailer because the 30 Amp outlet is usually very corroded.
Paul
Extra Class Ham Radio operator - K9ERG (since 1956)
Retired Electronics Engineer and Antenna Designer
Was a campground host at IBSP (2006-2010) - now retired.
Single - Full-timer
2005 Four Winds 29Q
2011 2500HD 6.0L GMC Denali (Gasser)

FlatBroke
Explorer II
Explorer II
I'm trying to think where I've been that there wasn't a 30 amp plug in right next to a 50 amp plug in. Seen 30 only but never 50 only. Never recall needing a 50-30 adaptor, many times a 30-50 and I have owned both 30 & 50 amp RV'S.

Hitch Hiker
"08" 29.5 FKTG LS

Dr_Bob
Explorer
Explorer
K3WE wrote:
Dr.Bob wrote:
Looking at a new 5th wheel that has a 50amp service. I do a lot of dry camping and my generator is 30amp. Would this be a problem?


The most common issue with 30A vs. 50 amp is that 50 amp rigs tend to have two air conditioners- and AC is a very significant draw! (And lets remember that a 50A hookup actually offers 100 amps worth of power while a 30A hook up is just 30 amps.)

In my 30 Amp rig, if the AC, the microwave and a hair drier are all running at the same time...click...there goes the breaker on the pedistal.

With your rig and a 50A hook up- you could typically run both of your AC's and the microwave and the hair drier with no problem.

But if you take your BIG 50A RV and use a 30A adaptor and only run one air conditioner and the microwave BUT no other big draw appliances...it generally works well.

What about cool weather- where no air conditioner is needed?- that's generally a lot easier unless you are running lots of space heaters...they often draw about 13 amps each- so again- a couple of space heaters and the microwave all at once will be pushing the limit for a 30A hook up. (note: generators + electric space heaters is kind of wasteful.)

By the way- my apologies for talking about 30A hookups when you are asking about a 30A generator...there's some nuances there- but again- the concept that 30 amps = one air conditioner and then only one other heavy-draw appliance like a microwave or coffee maker...that's the main consideration.

By the way- I neglected to mention electric water heaters...they are a big draw so AC + Electric hot water + a microave...that's potentially over the limit for 30 amps...If operating off of a generator- you are generally better off using LP to heat the water and the camper instead of electricity.
The RV I'm looking at only has 1 air conditioner. We have only camped in a campground 4 times in the past 30 years. Don't apologize for talking about 30 amp hook ups, we may be using campgrounds more in the future. Thank you for the information it is very helpful.

traveylin
Explorer
Explorer
While you are buying the 50 to 30 amp dog bone consider also getting one for 15 to30 amp. We frequently have the opportunity to keep the rv on shore power if we limit usage to less than 15 amp. A full draw on 15 amp, 24 hour type usage will likely overheat your extension plugs if using less than 12 gauge wire.

pops

wa8yxm
Explorer III
Explorer III
TubaPete wrote:
K3WE wrote:
Pet peeve here...JUST SAYING 30 amps or 50 amps is only 1/2 the story


Amen. These are just labels and neither totally describes the electrical supply. Moreover, they are only limits, not what you will actually use. Suffice to say, with a proper adapter (i.e. dogbone,) you will be fine. And MOST 50A pedestals also have a 30A socket.


Though I do agree with you that it is telling half the story and if more professionals understood the other half there would be a couple hundred less threads which start out "I had a 30 amp outlet installed at my house and ... ZAP ZOWIE AND SMOKE". (the pro wired it wrong).

The fact is 30 amp and 50 amp are "Standards" in RV service, and the other half (30 amp at 120 volt 50 amp at 120/240 volt) is part of that standard.. So when I say this is a 50 amp RV im sitting in even if the current power cord is only a 30

I imply "50 amp at 240 volt divided into two 120 volt legs 50 amps each" and "30 amps at 120 volt"

Someone said
I forget who wrote:
in this country you can assume electrical devices you purchase are safe.


This.. i do take exception to this.. I can buy a 16ga or even an 18ga extension cord with 15 amp plug and socket.. This is a bit anemic..

14ga is the minimum for that much power... I use 12 for heavy loads (I use the light weight cord for one electronic device.. but considering it's in the single digit watts range.. I am not worried about overload).
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times

K3WE
Explorer
Explorer
Dr.Bob wrote:
Looking at a new 5th wheel that has a 50amp service. I do a lot of dry camping and my generator is 30amp. Would this be a problem?


The most common issue with 30A vs. 50 amp is that 50 amp rigs tend to have two air conditioners- and AC is a very significant draw! (And lets remember that a 50A hookup actually offers 100 amps worth of power while a 30A hook up is just 30 amps.)

In my 30 Amp rig, if the AC, the microwave and a hair drier are all running at the same time...click...there goes the breaker on the pedistal.

With your rig and a 50A hook up- you could typically run both of your AC's and the microwave and the hair drier with no problem.

But if you take your BIG 50A RV and use a 30A adaptor and only run one air conditioner and the microwave BUT no other big draw appliances...it generally works well.

What about cool weather- where no air conditioner is needed?- that's generally a lot easier unless you are running lots of space heaters...they often draw about 13 amps each- so again- a couple of space heaters and the microwave all at once will be pushing the limit for a 30A hook up. (note: generators + electric space heaters is kind of wasteful.)

By the way- my apologies for talking about 30A hookups when you are asking about a 30A generator...there's some nuances there- but again- the concept that 30 amps = one air conditioner and then only one other heavy-draw appliance like a microwave or coffee maker...that's the main consideration.

By the way- I neglected to mention electric water heaters...they are a big draw so AC + Electric hot water + a microave...that's potentially over the limit for 30 amps...If operating off of a generator- you are generally better off using LP to heat the water and the camper instead of electricity.

Dr_Bob
Explorer
Explorer
Looking at a new 5th wheel that has a 50amp service. I do a lot of dry camping and my generator is 30amp. Would this be a problem?

Denny___Jami
Explorer
Explorer
Bumpyroad wrote:
ZZSPIRAL1 wrote:



If it's good enough for smkettner it's good enough for me. I suppose I should use a protector at home too?

Amazon has your protector for $257, includes shipping: http://www.amazon.com/Progressive-Industries-EMSPT30C-Surge-Protector/dp/B004A32CGI


I don't use mine at home since it has been a good reliable steady source of juice for over 30 years. I considered getting a protector from the power company which IIRC would run about $8 a month but since lightning can come in thru the ground wire or some such and not be protected I decided against it.
at the lake I did have a near miss with lightning and lost a heat pump controller board, garage door opener board, security system controller, etc.

bumpy


Don't let what they sell as surge suppressors give you a false sense of security when it comes to lightning because they are not fast enough or strong enough to stop a lightning strike.

As far as using 30 amp on 50 amp it's not safe because you are not protecting the cord or any other connection you have until you get to the 30 amp breaker in your panel.

Denny
2013 F350 SC DRW 6.2 V8 4.30 gears Air Lifts
2003 HitchHiker Premier 35FKTG 215/75/17.5 Goodyear G114 Tires

Bumpyroad
Explorer
Explorer
ZZSPIRAL1 wrote:



If it's good enough for smkettner it's good enough for me. I suppose I should use a protector at home too?

Amazon has your protector for $257, includes shipping: http://www.amazon.com/Progressive-Industries-EMSPT30C-Surge-Protector/dp/B004A32CGI


I don't use mine at home since it has been a good reliable steady source of juice for over 30 years. I considered getting a protector from the power company which IIRC would run about $8 a month but since lightning can come in thru the ground wire or some such and not be protected I decided against it.
at the lake I did have a near miss with lightning and lost a heat pump controller board, garage door opener board, security system controller, etc.

bumpy

time2roll
Nomad
Nomad
I have the 30a hardwire with remote. It finds some issue every year and I am just a part time weekender.

ZZSPIRAL1
Explorer
Explorer
smkettner wrote:
ZZSPIRAL1 wrote:

By chance can you provide an example for a "multi function" surge protector? I'm not getting good results from my search.


Note: Everyone's input is appreciated.


http://www.progressiveindustries.net/ems_pt30c.htm

Also available for hardwire and hardwire with display.

Progressive & SG at Tweetys

You will want a 30 amp item for a 30 amp RV. It will still work fine if plugged into 50 amp or 20 amp with a common adapter.



If it's good enough for smkettner it's good enough for me. I suppose I should use a protector at home too? The trailer has been plugged in lately, so my wife's friend can sleep in it. Hey.....she's a GREAT cook. Nice lady too.


Amazon has your protector for $257, includes shipping: http://www.amazon.com/Progressive-Industries-EMSPT30C-Surge-Protector/dp/B004A32CGI

ZZSPIRAL1
Explorer
Explorer
view2a.thrill wrote:
ZZ,

Are you sure that Silver Strand SP offers ONLY 50 amp service? From my experience with Reserve America and Recreation.gov, a listing of 50 amp usually means 50 amp and 30 amp and 20 amp.


No I'm not sure. That said, I'm staying in Mission Bay anyway.

ZZSPIRAL1
Explorer
Explorer
Bumpyroad wrote:
ZZSPIRAL1 wrote:
Is this considered a "multi function" surge protector? It appears to be a good deal.

http://www.ebay.com/itm/SURGE-GUARD-RV-POWER-PORTABLE-120V-30AMP-PROTECTOR-LOCK-/180354220670?pt=Motors_RV_Trailer_Camper_Parts_Accessories&hash=item29fdf3027e&vxp=mtr


well when I linked to that I got a bunch of choices but one surge guard portable at $230??? or there abouts would be a multi=function one. the standard surge protectors run $90 to $125 for a 30 amp.
bumpy


Maybe it sold. It's this, only with a lock for $245 before shipping.

http://www.amazon.com/TRC-Portable-Surge-Guard-Display/dp/B007AHYKI4/ref=sr_1_4?ie=UTF8&qid=1364431408&sr=8-4&keywords=surge+guard+30+amp

view2a_thrill
Explorer
Explorer
ZZ,

Are you sure that Silver Strand SP offers ONLY 50 amp service? From my experience with Reserve America and Recreation.gov, a listing of 50 amp usually means 50 amp and 30 amp and 20 amp.