Montana Owners Club - Keystone Montana 5th Wheel Forum - View Single Post

snfexpress · 08-05-2010, 04:03 PM

Bob,

Think about it as two legs of 120 volts instead of 240 and then everything starts to make sense. In our rigs, everything runs off of 120 volts (on AC). To get 50 amps out of one cable would require it to be very large in diameter for the run required from source to campgroud pedestal.

To be sure, some have 220 outlets installed (for dryers) in their rigs, but not many, and I would imagine that they have special considerations when not connected to split phase service.

So, to monitor two 120 volt supplies, I needed two meters.

I did confirm that when connected to a 30 amp supply with a crossover dogbone, both meters still read the correct amperage being drawn on each leg, while the volts and hertz will be close to identical (barring wire length).

The primary reason for the meters is to monitor amperage when we are running on our generators - the project we are working on now is building a platform on the back of the 5er to enclose and support them. We're a couple of days into it and I already have cuts and blood drip...

Hope this helps.

08-05-2010, 04:03 PM	#12
snfexpress Montana Master Join Date: Jan 2006 Location: South Posts: 2,499 M.O.C. #5140	Bob, Think about it as two legs of 120 volts instead of 240 and then everything starts to make sense. In our rigs, everything runs off of 120 volts (on AC). To get 50 amps out of one cable would require it to be very large in diameter for the run required from source to campgroud pedestal. To be sure, some have 220 outlets installed (for dryers) in their rigs, but not many, and I would imagine that they have special considerations when not connected to split phase service. So, to monitor two 120 volt supplies, I needed two meters. I did confirm that when connected to a 30 amp supply with a crossover dogbone, both meters still read the correct amperage being drawn on each leg, while the volts and hertz will be close to identical (barring wire length). The primary reason for the meters is to monitor amperage when we are running on our generators - the project we are working on now is building a platform on the back of the 5er to enclose and support them. We're a couple of days into it and I already have cuts and blood drip... Hope this helps.