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04-18-2017, 11:02 PM
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#1
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Senior Member
Winnebago Owners Club Texas Boomers Club Solo Rvers Club
Join Date: Dec 2015
Location: Fulltime Traveler
Posts: 1,041
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Using a 50 amp surge protector with 30 & 15 amp
Does a 50 amp surge protector work properly if plugged into 30 amps or 15 amps or do I need 3 different units 
If a 30 amp power pole surges up to 40 amps, will that hurt anything if my system is designed for 50 amps
If not then do I need to use a surge protector at all when on 15 or 30 amps due to my coach being able to handle 50 amps
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04-19-2017, 01:33 AM
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#2
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Senior Member
Join Date: Nov 2015
Posts: 26,848
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Surge protection is not about amps...circuit breaker handles that chore
Surge protection is about that 'sudden' in-rush of voltage, voltage spikes, open neutrals, open ground etc
50a Surge protector ...
Plug 30A to 50A adapter into power source then into surge protector then into rig power cord
Plug 15A to 50A adapter (or 15A to 30A adapter then 30A to 50A adapter) into power source then into surge protector then into rig power cord
In any of the above scenarios rig is protected from voltage spikes/sudden in-rushes etc
In above scenarios the 'feeder' CB protects amperage draw
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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04-19-2017, 09:41 AM
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#3
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Senior Member
Join Date: Jan 2000
Location: Castle Rock Co USA
Posts: 578
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I get errors when plugged into 30 amp output- its a 50 amp protector.
__________________
2011 Montana-3400RL
Towed by[B]'99 F-350 SD PSD DRW Lariat
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04-19-2017, 09:52 AM
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#4
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,500
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Quote:
Originally Posted by RichR
I get errors when plugged into 30 amp output- its a 50 amp protector.
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Do the errors , relate to a possible park power problem .
Have you used your adapter and the surge guard at another park without problems ?
What brand & model of surge guard are you using ?
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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04-19-2017, 10:51 AM
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#5
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Community Moderator
Newmar Owners Club
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 31,559
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What error codes were you getting? You may have had a real problem with the pedestal. They are not always wired correctly. Try again at the next CG and see if you get the same thing. Let us know.
__________________
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
No amount of money can buy you an extra second of time.
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04-19-2017, 11:21 AM
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#6
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Senior Member
Join Date: Jan 2016
Location: Northridge, CA
Posts: 1,218
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Error is probably because it is one phase only on 30a
__________________
Harry Grace
KM6ZRG
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04-19-2017, 05:07 PM
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#7
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Senior Member
Join Date: Nov 2015
Posts: 26,848
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Quote:
Originally Posted by Hgrace56
Error is probably because it is one phase only on 30a
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50A surge guard doesn't care
I have used mine on both power sources
50A 5th wheel
30A via adapter----NO issues
15A via adapters....No issues
Surge Guard checked:
L1 & L2 voltages, Open Neutral, Open Ground, Reverse Polarity, etc.
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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04-19-2017, 06:40 PM
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#8
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Senior Member
Monaco Owners Club
Join Date: Jun 2014
Posts: 14,608
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My surge protector is hardwired prior to the transfer switch. I have plugged into 30 & 15 amp without a problem. I have the progressive surge protector and it will warn of reversed polarity and low voltage no matter what amperage outlet you are plugged into. I detected both these problems plugged into a 30 amp and a 15 amp.
__________________
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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04-19-2017, 08:12 PM
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#9
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Senior Member
Workhorse Chassis Owner Entegra Owners Club
Join Date: Dec 2004
Location: UT/AZ
Posts: 1,417
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With your 50 amp protector your covered as good as you can get. Your good to go.
__________________
Pat & Denise
2016 Entegra Aspire RBQ
18 Silverado
FMCA 212171
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04-20-2017, 03:02 PM
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#10
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Senior Member
Join Date: Jan 2000
Location: Castle Rock Co USA
Posts: 578
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Thatss what I get- only can find one leg
__________________
2011 Montana-3400RL
Towed by[B]'99 F-350 SD PSD DRW Lariat
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04-20-2017, 05:43 PM
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#11
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Senior Member
Freightliner Owners Club
Join Date: Apr 2002
Location: Pensacola
Posts: 2,728
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Quote:
Originally Posted by Hgrace56
Error is probably because it is one phase only on 30a
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Phase not a factor--
A 30 amp to 50 amp adapter has an internal jumper to provide power to both sides (legs) of the 50 amp power cord. Full 50 amp power is two 120 volt legs with a common neutral. Will measure 240 volts across the hot legs.
Most RV's use two 120 circuits. (Some large RV's do have 240 volt service) Black lines here are 120 volt.
__________________
Hooligan, Pensacola, Fl -U.S. Coast Guard 1956-1985
2016 Thor Siesta Sprinter 24ST diesel -1972 Moto Guzzi
2008 Suzuki Grand Vitara TOAD
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04-21-2017, 08:19 AM
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#12
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Senior Member
Join Date: Apr 2017
Posts: 193
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Quote:
Originally Posted by RichR
Thatss what I get- only can find one leg
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Sounds like a bad adapter.
Disconnect after the adapter.
Check out Hooligans wiring diagram and check for 120 between gray and both blacks
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04-21-2017, 06:05 PM
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#13
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Senior Member
Join Date: Jan 2016
Location: Northridge, CA
Posts: 1,218
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Quote:
Originally Posted by Hooligan
Phase not a factor--
A 30 amp to 50 amp adapter has an internal jumper to provide power to both sides (legs) of the 50 amp power cord. Full 50 amp power is two 120 volt legs with a common neutral. Will measure 240 volts across the hot legs.
Most RV's use two 120 circuits. (Some large RV's do have 240 volt service) Black lines here are 120 volt.
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I understand that but I don't think the protector does.
That is the error seen.
__________________
Harry Grace
KM6ZRG
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04-22-2017, 02:01 PM
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#14
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Senior Member
Join Date: Apr 2017
Posts: 193
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I could see a coach that had stuff that required 240v ( washer dryer comes to mind ) that you may want a surge protector that only accepts 240V.
I have not seen such a thing in my less than 1 year with a 50A RV.
If that is the case you can only connect to 50A.
What is the make and model for surge protector ?
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