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Author Topic: 120v main or sub panel in bus  (Read 1172 times)
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« on: July 29, 2008, 01:07:29 AM »

 Huh Undecided What is the correct choice for the breaker panel(s) in a bus? My Onan generator has a main breaker mounted on it.  Campgrounds have breakers right next to their plugs.  Is it correct to use a Main Lug load center, or must I use a Main Circuit Breaker load center?  It seems to me that using a main lug type should be OK because both 120v sources are breaker protected.  If the generator didn't have the breaker on it then I would have to use a main breaker load center.  Please help I am really over thinking this! Thanks, Tom
Tom & Phyllis
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« Reply #1 on: July 29, 2008, 04:58:25 AM »

I used a standard Square D 100 amp panel in mine. The shore power & gen set both run to the transfer switch assembly, transfer switch assembly to the input of the panel, and everything else from there, including the inverter. it's more complicated then that but that is the simplified version. One of these days I am going to put together a diagram of the system & post it like Dallas asked me to. FWIW, we have been "camping" out on a piece on land we were going to buy for 3 months with no problems.



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73' MC-8 8V71/HT740 Southwest Florida

« Reply #2 on: July 29, 2008, 01:24:21 PM »

Since our Main  and Sub (inverter) panel are inside the bus, we wanted a way to quickly kill all power if necessary from inside the bus.  We installed a main panel with a 50 amp main breaker. Our generator has breakers in it also, but is not as readily avalable as our main panel.   Jack

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« Reply #3 on: August 02, 2008, 10:53:49 PM »

All my electric service is inside.  I have three square D panels I bought from Home Depot.  First is a box with 4 50 amp breakers-2 for shore power and 2 for generator with a plate that slides between the two so only two can work at a time.  The next panel is the main circuit box for most items except for inverter.  One of the circuits from the main box is a 30 amp going to/through the inverter to the third circuit breaker box for all items powered by the inverter.  Simple, a bit bulky though, but can get circuit breakers most anywhere.  In 12 years, only replaced the 2 50 amp for the generator.  Good Luck, TomC

Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
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« Reply #4 on: August 04, 2008, 08:55:00 AM »

I have main breaker by my generator, by the shore power input, to and from the inverter and on the main panel as well.  The ones near the shore power input only turn off the hot wires, and they need to be able to turn off the hots and the neutral both in case shore power is wired wrong.

Jim Stewart
El Cajon, Ca.  (San Diego area)

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