Low Coach Voltage

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Low Coach Voltage

July 16, 2016, 12:42:18 pm

When I plug my coach to my storage power I am only getting 97v when I check wall plug voltage in the coach. The reading at the wall outlet is 120. only thing running is the residential refer which is new...have had this problem for quite a while. When I am on the road at a park there is no issue. Any ideas??

Re: Low Coach Voltage

Reply #1 – July 16, 2016, 02:23:20 pm

Have you checked the voltage at the storage site box?

Re: Low Coach Voltage

Reply #2 – July 16, 2016, 02:26:37 pm

120v and only thing running on on the inside is refer.

Re: Low Coach Voltage

Reply #3 – July 16, 2016, 02:29:45 pm

Are you using an extension cord and if so how long and what gauge wire?

Re: Low Coach Voltage

Reply #4 – July 16, 2016, 02:31:21 pm

Put a splitter or "octopus" at the outlet and check voltage while you are plugged in. If still 120 volts you have a real mystery. Make sure the refrigerator is cycling when checking. Unless you are using a small gauge ext.

Re: Low Coach Voltage

Reply #5 – July 16, 2016, 02:34:41 pm

Thanks, will go to storage in a bit and give it a try

Re: Low Coach Voltage

Reply #6 – July 16, 2016, 02:38:41 pm

Quote from: J. E. Smith Sr. – July 16, 2016, 12:42:18 pm

When I plug my coach to my storage power I am only getting 97v when I check wall plug voltage in the coach. The reading at the wall outlet is 120. only thing running is the residential refer which is new...have had this problem for quite a while.

This post is confusing, to say the least. You're saying 97v @ the "wall plug" and 120v @ "the wall outlet"? Where & what is "the wall plug"? Has this been happening since the reefer was installed?

Re: Low Coach Voltage

Reply #7 – July 16, 2016, 02:43:53 pm

120v at the outlet outside the coach, 97v at the wall plug inside the coach...analog meter is in the 80's
This has been going on quite a while.

Re: Low Coach Voltage

Reply #8 – July 16, 2016, 02:44:35 pm

Quote from: J. E. Smith Sr. – July 16, 2016, 02:43:53 pm

120v at the outlet outside the coach, 97v at the wall plug inside the coach...analog meter is in the 80's
This has been going on quite a while. Before new refer.

Re: Low Coach Voltage

Reply #9 – July 16, 2016, 03:08:11 pm

I would be looking at my schematic to see what else is connected to that circuit, and if any "add-ons" have been done. Ground-fault-indicators (GFI) generally work or trip, period. When you travel & hook-up, are you on 50 amps, and, in storage, is it 30 amps? Wiring lag (without tripping the breaker) is my thought, at this time.

Re: Low Coach Voltage

Reply #10 – July 16, 2016, 04:56:57 pm

I just picked up a 2' 12 gauge ext cord w/ 3 outlets.

1) I am getting 120v with out coach plugged in.

2) I am using 50 amp shoreline with 30amp adapter

3) As soon as I plug in coach now 104 inside and at 3 outlet 2' ext cord.

4) Cords seemed a little warm.

5) Turned off Main switch at step(entrance). refer still running no change.

Thanks ,
John

Re: Low Coach Voltage

Reply #11 – July 16, 2016, 04:59:01 pm

Definitely not 50 amp.....I believe 25 amp

Re: Low Coach Voltage

Reply #12 – July 16, 2016, 06:04:27 pm

Your 50A cord from the coach plugs into a 50A to 30A adapter, and then that plugs into a 30A to 20A adapter to plug into a regular wall outlet. Is that correct? If that's the case you should be fine. If you are using an extension cord from the 30-20A adapter to the outlet that may be part of your problem.

Is there any way that you can plug into a regular 50A or 30A outlet at your storage site?

Re: Low Coach Voltage

Reply #13 – July 16, 2016, 06:10:56 pm

No 50 or 30....The cords are as you described
No extension cord
I am using the 2' 12 gauge from the outlet to the 50 amp shoreline
If I take the stubby cord out of the equation it makes no difference

Re: Low Coach Voltage

Reply #14 – July 16, 2016, 06:11:43 pm

It may be that your 30 amp adapter is not making good contact either at the plug end or at the receptacle end. Doe the plugs fit snuggly? If not or the cords are warm a new one might be a good choice. It you have a cord reel it is possible that the contactors at that end are not working properly. This is something you should resolve sooner than later.

Re: Low Coach Voltage

Reply #15 – July 16, 2016, 06:15:49 pm

Quote from: J. E. Smith Sr. – July 16, 2016, 04:59:01 pm

Definitely not 50 amp.....I believe 25 amp

Are you checking the amps at the point-of-electrical connection where you're stored? BTW, unless your coach has changed from ours, the switch at the steps shuts down all lighting, etc., ONLY. I believe it's called a "Salesman Switch". I would be "leery" of plugging a large coach into a 15 amp circuit.

Re: Low Coach Voltage

Reply #16 – July 16, 2016, 06:18:57 pm

Hi Guys,

I wonder if the low side power goes really low with a bigger A/C current draw. If So I might wonder if you have loose connections or burned contacts on the transfer switch or somewhere in your adaptors. Contact surfaces usually can be cleaned unless too badly burned. Just a thought.

Jim

Re: Low Coach Voltage

Reply #17 – July 16, 2016, 06:38:51 pm

Will look into that one next
All power cords are new, including shoreline
No problems when I plug into 50 amp, ......Generator shows 120v

Re: Low Coach Voltage

Reply #18 – July 16, 2016, 06:57:56 pm

You have either an additional load you are not aware of (inverter/charger charging, water heater element, etc) OR

You have a bad connection between the outlet you are plugged into and your outlet in the coach. I would start by checking the shore power cord carefully for signs of overheating or loose/burned connection.

Re: Low Coach Voltage

Reply #19 – July 16, 2016, 07:04:45 pm

Coach has been at FOT for the past month getting upgrades and many items checked

Water heater may be on..hopefully this is it.
New shoreline and reel was installed at FOT while there. (doubt this is it as this has been going on for a while).
I should be able to check my Tri-Star display and see what kind of amps are being used

Re: Low Coach Voltage

Reply #20 – July 16, 2016, 07:11:08 pm

If it seems to be ok plugged into a 50 amp outlet but when you add in the 50 - 30 converter and plug into a 30 outlet and the voltage drops, well the converter is a good first place to start. Bad connections are bad. They cause voltage loss, heat and other problems including burning up you new 50 amp landline. Get a new one.

Re: Low Coach Voltage

Reply #21 – July 16, 2016, 07:23:06 pm

I am thinking converter too....Just left my kids inheritance at FOT, oh well this is a great coach...she deserves the best.

I believe it is the original converter too.

Time to start shopping.

Re: Low Coach Voltage

Reply #22 – July 17, 2016, 02:04:53 pm

Good call Brett, checked coach and found the block heater to be on. 114v in the coach now... amp draw is .6 amps

I want to thank all of you for you ideas and help...This forum is a wonderful resource with so much knowledge. I appreciate you all very much.

Re: Low Coach Voltage

Reply #23 – July 17, 2016, 02:15:21 pm

John, I would still be concerned that the voltage drop with the block heater turned on was 17 volts (114 to 97) Check the plug where the block heater is connected. Many have discovered a melted plug.

Re: Low Coach Voltage

Reply #24 – July 17, 2016, 02:24:46 pm

I will, going to Galveston for a few days tomorrow, will have time to look her over...In the past, it seems the voltage starts low and works its way back up very slowly
I sure wish it was fall..

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