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50 Amp Service Question

Our current spot at Copper Breaks State Park shows 50 amp at the pedestal. Yet, our Progressive EMS shows no draw on Leg 1 and about 15-17 amps on Leg 2 with both A/C running. Why no draw on leg 1? 

Yesterday while using the washer we got the E6 error undervoltage as EMS cut power. Resetting breaker re-established power to the coach and we were OK as long as both A/C and W/D weren't all running.

Ideas?
Randy (N4TDT) and Karen Crete
Sarasota, Florida
SOLD:  2000 U270 34' WTFE Build 5756 "Ole Red"

Re: 50 Amp Service Question

Reply #1 –
It sounds like both AC's are on the same leg, and you have nothing putting a load on the other leg.  Try running your microwave & water heater.  You should see the other leg increase.

Re: 50 Amp Service Question

Reply #2 –
Randy,  wired correctly each AC should be running off opposite legs.

Are both legs showing about 120v?  Microwave is on an inverter circuit powered by leg 2
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: 50 Amp Service Question

Reply #3 –
2 AC's running are going to draw more then 17 amps. Unless one has only fan running.

What has shown at other campgrounds 50 amp pedistals?
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago

Re: 50 Amp Service Question

Reply #4 –
Quote from: turbojack –
What has shown at other campgrounds 50 amp pedistals?
What he said........... ^.^d
1993 U-240 "La Villa Grande"..CAT 3116 w/ Pacbrake PRXB...Allison 3060 6-speed..
Previous: 1983 Airstream 310 turbo diesel, 1979 Airstream 280 turbo diesel
                                      Build # 4297
                                      PNW natives
                      Home base:  'Cactus Hug' (Ajo, Arizona)
                        DW Judy & Chet the wonder dog
                        Full-Timers 'Sailing the asphalt sea'

Re: 50 Amp Service Question

Reply #5 –
Interesting. Toaster oven and microwave both ran on leg 2, but ran only 1 ac during their operation. Leg 2 Up to 34 amps. Voltage on leg 1 dropped, but no amps shown. We're moving tomorrow and will check next stop.
Randy (N4TDT) and Karen Crete
Sarasota, Florida
SOLD:  2000 U270 34' WTFE Build 5756 "Ole Red"

Re: 50 Amp Service Question

Reply #6 –
This may be totally unrelated but I just replaced my shore power cord due to intermittent loss of the neutral leg. I saw some strange reading on the EMS and lost a couple of small electrical items before FOT figured it out. Just a heads up.
2002 U320 40Ft  MC # 15759
Coach # 5995
Previous coaches
2002 U320 coach  #5941
1996 U270 coach #4808

Re: 50 Amp Service Question

Reply #7 –
Finally got around to pulling wiring schematic (attached) .  I do see AC on different legs. Our coach may be wired incorrectly or EMS is incorrect.

Randy (N4TDT) and Karen Crete
Sarasota, Florida
SOLD:  2000 U270 34' WTFE Build 5756 "Ole Red"

Re: 50 Amp Service Question

Reply #8 –
So I shut off from a/c and turned on rear a/c and EMS is not reporting Amos on either leg so it would appear EMS was incorrectly wired?  It shows voltage on leg 1 and 2 but never shows amps on leg 1.

It also makes sense that leg 2 with both AC running never shows more than 16 Amps (1 ac).
Randy (N4TDT) and Karen Crete
Sarasota, Florida
SOLD:  2000 U270 34' WTFE Build 5756 "Ole Red"

Re: 50 Amp Service Question

Reply #9 –
Have you removed the main breaker panel cover to see which leg your breakers are on?

Also easy to move breakers around if you want to move something to a different leg.

We also moved microwave breaker from inverter panel to main panel.

Re: 50 Amp Service Question

Reply #10 –
On your voltage reading for L1 & L2, are they exactly the same or a little different ever time you look at it?
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago

Re: 50 Amp Service Question

Reply #11 –
Currently hooked to 50 amp service. Both ac's running. L1 123v, 0a...L121v 17a.
Randy (N4TDT) and Karen Crete
Sarasota, Florida
SOLD:  2000 U270 34' WTFE Build 5756 "Ole Red"

Re: 50 Amp Service Question

Reply #12 –
Time for some wiring checks.  Something is not right.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: 50 Amp Service Question

Reply #13 –
Here's what our panel looks like (pic attached).

Randy (N4TDT) and Karen Crete
Sarasota, Florida
SOLD:  2000 U270 34' WTFE Build 5756 "Ole Red"

Re: 50 Amp Service Question

Reply #14 –
Sounds like the CT (current transformer) that is on Leg 1 of your Progressive EMS may have died. Progressive may have another name for what they use but it will be similar to the old style CT.  This is the "thing" that looks at electric flow and transfers it to a digital readout.

Pamela & Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: 50 Amp Service Question

Reply #15 –
If you look at the wiring diagram in your earlier post you will see that the Front and Rear AC or on separate legs.  If they are both running then both legs should show load.  Are both of the volt meters on the OEM panel showing voltage?   
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: 50 Amp Service Question

Reply #16 –
Roger...yes, both legs show voltage, leg 1 no amperage.
Randy (N4TDT) and Karen Crete
Sarasota, Florida
SOLD:  2000 U270 34' WTFE Build 5756 "Ole Red"

Re: 50 Amp Service Question

Reply #17 –
I agree with Pam and Mike
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago
 

Re: 50 Amp Service Question

Reply #18 –
Quote from: Pamela & Mike –
Sounds like the CT (current transformer) that is on Leg 1 of your Progressive EMS may have died. Progressive may have another name for what they use but it will be similar to the old style CT.  This is the "thing" that looks at electric flow and transfers it to a digital readout.

Pamela & Mike
+1
    • You know that Voltage is good on both legs
    • You know the A/C's are wired to both legs (at least per standard design drawing)
    • You know that both A/C's run
    • But EMS fails to show any current on one leg
    [/list]

    Has to be a partial EMS failure (Current Sensor or conversion IC Chip or circuit board transducer/multiplexer circuit to readout)
    Don't see the need for troubleshooting coach wiring
      • has the leg ever shown current since you owned the coach and now it has suddenly failed?
      • if yes, was there any sort of electrical event, after which the EMS current failed to report normally?

    I've always found Progressive Ind. to be anxious to please in helping one troubleshoot or confirm diagnosis, over the phone - but that was years ago since my last need to talk with them.  Have you tried calling them?  800-307-6702, press 2, Central Time
    HTH,
    Neal
    The selected media item is not currently available.
    Neal (& Brenda) Pillsbury
    '02 U320 SPEC, 4200, DGFE, Build #5984
    '04 Gold Wing
    '07 Featherlite 24'
    '14 Jeep Grand Cherokee Summit
    MC #14494
    Exeter, NH & LaBelle FL
    Quality makes the Heart Soar long after Price is Forgotten