Question on Amps and Voltage

[Dorrie]

Hi everyone and hope all is having a good Summer.
I have some questions and Hubby is away so hearing from him is rough.

Okay we have a Montana HC, Dometic Fridg. Plus have Surgeguard as our surge protector. We are on 30 amps but surge protector reads 115 volts, having green light on the power surge. The fridge does not go down 42 degrees and seems A/C has a hard time cooling. Meaning stays on all the time, blinds are closed.
Some one blew a fuse the other day and affected us and things seem to be worse.

What are the chances something is wrong with our electric pedalstill? I put the fridge on Gas and the temp is dropped down a degree.

Should I go to the office about the voltage? Not sure if the reading is right.
Thank you

[flybouy]

Volts and Amps are 2 different measurements. Think of a garden hose, you have pressure PSI or pounds per square inch and volume that's expressed as GPM or gallons per minute. Electricity works the same way, the voltage is the "pressure" pushing the electrons and the amps is a measurement of the "flow" of the electrons. There is a relationship between the 2 according to Ohm's law. Ohm's law states that volts X Amps =ohms. So the lower the voltage the higher the amperage draw for the same resistance (such as your air conditioner) For more in depth definition take a look at this web site...https://www.mrsolar.com/what-does-volts-amps-ohms-and-watts-mean/
With that said, a voltage below 110 is problematic so at 115 volts while not ideal, you should be O.K. With a 30 amp service running the air conditioner will limit you to what else you can run at the same time. At 115 V AC and the air conditioner running you may want to run the fridge, and especially the water heater on gas.

[NorskeBob]

Depending upon the outside air temp the frig and AC will be impacted. With a single AC unit in our last RV could not keep the RV cool if it was in the sun and outside air temps were above 75 degrees. I added a second fan on the back of the frig on our last RV too - it helped some.

[bobbecky]

If everything is running and you are at 115 volts, you are doing very well. You will expect some voltage drop under load and where you are at is good.

[Bob Landry]

Depending upon the outside air temp the frig and AC will be impacted. With a single AC unit in our last RV could not keep the RV cool if it was in the sun and outside air temps were above 75 degrees. I added a second fan on the back of the frig on our last RV too - it helped some.

The only effect of outside temperature is the amp draw of the compressor but has no effect on measuring the efficiency or operation of the unit. That is determined my measuring the split across the coil, inside air only, and that is affected by dirty filters, improperly installed ducting and the AC's plenum chambers not being properly taped and isolated from each other..

The only reason to even consider the outside temp is to determine if a unit is properly charged. That's done by measuring amp draw with a clamp-on meter and relating the draw to actual temperature

[xrated]

Volts and Amps are 2 different measurements. Think of a garden hose, you have pressure PSI or pounds per square inch and volume that's expressed as GPM or gallons per minute. Electricity works the same way, the voltage is the "pressure" pushing the electrons and the amps is a measurement of the "flow" of the electrons. There is a relationship between the 2 according to Ohm's law. Ohm's law states that volts X Amps =ohms. So the lower the voltage the higher the amperage draw for the same resistance (such as your air conditioner) For more in depth definition take a look at this web site...https://www.mrsolar.com/what-does-volts-amps-ohms-and-watts-mean/
With that said, a voltage below 110 is problematic so at 115 volts while not ideal, you should be O.K. With a 30 amp service running the air conditioner will limit you to what else you can run at the same time. At 115 V AC and the air conditioner running you may want to run the fridge, and especially the water heater on gas.

Uuh, not quite! Volts X Amps = Watts. What you are probably thinking is the following.... Volts/Amps = Ohms! :D

[flybouy]

Uuh, not quite! Volts X Amps = Watts. What you are probably thinking is the following.... Volts/Amps = Ohms! :DI shouldn't write with no sleep. You are absolutely correct. Guess I had Ibm's law on the brain!