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Old 09-28-2016, 07:05 AM   #15
Olroy
 
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1986 34.5' Airstream 345
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Good info here. Some real elect. In this out fit. Be kind of foolish if you have an old 30A not to run yo a 50 A cable. Split the 2 hot wires and add a little panel run you a super power strip on extra phase to kitchen for appliances,or portable a/c if needed..no more problems with overloaded recut. In kitchen.. Easy DIY just use stranded #10 for power strip..worked for me. Carry a 30 amp adapter. ( I'm electrician)
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Old 09-29-2016, 07:20 AM   #16
Mel
 
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Originally Posted by Olroy View Post
Good info here. Some real elect. In this out fit. Be kind of foolish if you have an old 30A not to run yo a 50 A cable. Split the 2 hot wires and add a little panel run you a super power strip on extra phase to kitchen for appliances,or portable a/c if needed..no more problems with overloaded recut. In kitchen.. Easy DIY just use stranded #10 for power strip..worked for me. Carry a 30 amp adapter. ( I'm electrician)
Whatever are you 'talking' about?
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Old 09-29-2016, 08:19 AM   #17
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Originally Posted by MelGoddard View Post
Whatever are you 'talking' about?
I think that he is pointing out the foolishness of struggling with power management on a 30 amp outlet when there is usually 100 amps(2 50amp 120v legs) available just inches away.
Even on 50 amp trailers they usually only use second leg for 2nd AC.
There are much better ways to do it.
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Old 09-29-2016, 08:17 PM   #18
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Originally Posted by Al Boondy View Post
I think that he is pointing out the foolishness of struggling with power management on a 30 amp outlet when there is usually 100 amps(2 50amp 120v legs) available just inches away.
Even on 50 amp trailers they usually only use second leg for 2nd AC.
There are much better ways to do it.
Perhaps you're right.
You pointed out earlier that the legs were 180 out of phase; so I gather that Olroy is suggesting running a separate circuit for the one leg, to handle the 'heavy grunt' and using the other leg for 'normal' services.

I only have one A/C so that would be a lot of work to get the results I need.
Suppose that if I use a 50-30 adapter, that would give me a full 30 amps for the services that I use????
My meter showing an abnormal voltage drop, indicates to me that the 'delivery' is not sufficient at some campsites. (like this last one in Wheatley, Ontario.)
Other campsites give me the 'full Monty'.
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Old 09-29-2016, 09:13 PM   #19
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Originally Posted by MelGoddard View Post
Perhaps you're right.
You pointed out earlier that the legs were 180 out of phase; so I gather that Olroy is suggesting running a separate circuit for the one leg, to handle the 'heavy grunt' and using the other leg for 'normal' services.

I only have one A/C so that would be a lot of work to get the results I need.
Suppose that if I use a 50-30 adapter, that would give me a full 30 amps for the services that I use????
My meter showing an abnormal voltage drop, indicates to me that the 'delivery' is not sufficient at some campsites. (like this last one in Wheatley, Ontario.)
Other campsites give me the 'full Monty'.
I've seen campgrounds with a 10v difference between the 2 legs because all the 30 amp outlets were on the same leg and all the campers were using 30 amp service. I switched mine.
This could have been the problem.

Retrofitting an Airstream wouldn't be easy but if you have the inside skins off it's a no brainer. Wire it with residential load center for 240v 50amp service and balance the loads. If you only have 30 amp service at campground a 30 to 50 amp adapter with jumper will allow everything to work as normal 30 amp. This also allows conventional clothes dryers, induction stove top and wall mount 240v electric heaters to be installed. No worries about water heater, refrigerator microwave blow dryer and ACs on at the same time.
High end coaches are wired this way don't know why more travel trailers aren't.
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Old 09-29-2016, 11:30 PM   #20
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Older parks with just a 30 amp RV and 20 amp standard duplex at each site are typically sharing 50 amp 240Vac service with the other side. Thus the 30 amp on side one and the 20 amp on side two are on one leg and the 20 amp on side one is paired to the 30 amp on side two. The entire park is underpowered for the loads presented by today's trailers even with 30 amp service as the incoming power of the time did not contemplate air conditioning.

Having a surge and low voltage device like this 30A Portable Model 34830 with LCD Display - http://www.trci.net/products/surge-g...-w-lcd-display) will help protect all of your trailer 120Vac equipment.

If the issue of maintaining proper voltage is a big concern, one can carry a voltage regulator as well (http://www.trci.net/products/surge-g...tage-regulator) as the surge protection to cover all the bases. The 50 amp version is quite heavy.
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