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06-20-2018, 12:34 PM
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#1
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Senior Member
Join Date: Oct 2013
Location: Lighthouse Point, FL & Blairsville, GA
Posts: 396
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Electrical Question
As of late, I have noticed the voltage reading on L-1 consistently averages approximately 8 volts less than L-2; sometimes as much as 10-12 volts. This is the case for both Shore Power and Generator power options. Is this normal or something to be concerned about?
Thanks.
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Jigs - FMCA #F436227
2015 Newmar Mountain Aire 4553, HWH Active Air
2012 Jeep Wrangler Rubicon - COD MW3
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06-20-2018, 01:18 PM
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#2
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Senior Member
Join Date: Jul 2014
Posts: 35,317
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I would check or have checked the neutral connections on the output of the automatic transfer switch ( ATC ) and the main breaker panel in the coach.
A loose neutral will allow the 2 lines to vary up and down lime yours are. If it gets worse you can start doing damage to your components from high or low voltage.
I see you have something drawing 18 amps. If you were to turn what ever is on off, does the voltage balance out ?
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06-20-2018, 03:25 PM
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#3
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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Check your transfer switch for loose wiring, can find info in this link.
Recalls down the bottom.
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06-20-2018, 03:50 PM
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#4
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Moderator Emeritus
Jayco Owners Club RV Trip Wizard
Join Date: Oct 2009
Location: Poinciana FL
Posts: 7,781
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If none of these suggestions work, it could be the Silverleaf its self. From new we had one leg consistently lower than the other which I mentioned during one of our factory warranty visits. Turned out to be the monitoring/reporting system, not a significant imbalance in reality
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Jay and Peggy Monroe
"Can't take it with you, not leaving any behind"
2024 Jayco White Hawk 26FK
2024 Ford Expedition
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06-21-2018, 11:13 AM
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#5
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Senior Member
Newmar Owners Club Coastal Campers Freightliner Owners Club
Join Date: Jan 2017
Location: Tampa, Florida
Posts: 737
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X2 on check for loose neutral connections. Could be some very expensive repairs in your near future if the situation is not corrected.
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Ken & Ara Brewer
2020 Newmar Ventana 3407 DP. (Previous 2016 Newmar Canyon Star 3710 gasser). 2014 V-6 Chevy Equinox Toad.
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06-21-2018, 12:13 PM
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#6
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Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: Jun 2011
Location: Texas
Posts: 6,381
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One thing I notice is that leg1 is under load while leg2 is not. Try turning on the 2nd air conditioner and see if you can match the loads on both legs, then look at the reading.
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2022 London Aire 4551 * 2022 GD Imagine 2800BH * 2021 RAM 3500 DRW * 2020 Wrangler
NHSO (Newmar Hoot, Sevierville Original)
Kindness Matters
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06-21-2018, 12:50 PM
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#7
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Senior Member
Join Date: Oct 2013
Location: Lighthouse Point, FL & Blairsville, GA
Posts: 396
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Quote:
Originally Posted by redbaron73
One thing I notice is that leg1 is under load while leg2 is not. Try turning on the 2nd air conditioner and see if you can match the loads on both legs, then look at the reading.
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Hi, Ronnie --
Good observation. I was also thinking along those lines, so over the past couple of days I have taken note of different load configurations. When L-2 has a heavier load than L-1, the voltage readings are more even with one another. When the loads are similar on each leg, I am still seeing a lower voltage reading on L-1 of approximately 6-8 volts. Here are some examples under varied load conditions.
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Jigs - FMCA #F436227
2015 Newmar Mountain Aire 4553, HWH Active Air
2012 Jeep Wrangler Rubicon - COD MW3
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06-21-2018, 05:51 PM
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#8
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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Do you have a cord reel and has the transfer switch connections been checked?
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06-21-2018, 06:00 PM
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#9
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Senior Member
Join Date: Jul 2014
Posts: 35,317
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Get a volt meter and confirm the reading your seeing.
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06-21-2018, 06:06 PM
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#10
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Senior Member
Winnebago Owners Club
Join Date: Aug 2002
Location: Indian River, De
Posts: 1,024
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Do you have an infrared thermometer? They are inexpensive; under $20 at Harbor Freight, and are very good at spotting problem areas. You could use it to check the breaker in a CB panel, or find loose wires on the terminals of the transfer panel, etc. When there is a voltage drop across a loose connection, it generated heat, and will stand out as a much warmer terminal that the others.
Also useful at other times; find cold air infiltration around window and door weatherstripping, or heat loss; tires that run low pressure will be hotter than the others (but remember that the sunny outside tire can show as a warmer).
Anyways, you get the idea.
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CaptBill
USAF 1965-1971; USCG Master
2002 Horizon 36LD
Indian River, De
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06-21-2018, 06:36 PM
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#11
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Senior Member
Join Date: Aug 2017
Posts: 2,091
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Unloaded there is a 5 volt difference . It is more than likely your panel giving the error. The best way is to confirm the voltages with a meter. Your generator should be 120 volts , so unloaded both readings should be identical.
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1993 Tiffin Allegro Bay 32'
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