mhfloyd
KY
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Hello all,
I am installing a Magnum MS2012 in our new fiver and want to use a sub panel. Following Magnums instructions for a Single In/Single Out configuration, I would install a 60 amp max (I would probably use a 50 amp to match the primary panel leg at 50 amps, but could get by with 30) feed to the sub panel from one leg of the primary distribution center.
I am running into a couple of issues:
1. The WFCO WF8930/50 says to use 20 amp breaker max for individual circuits. I suppose I could use a double gang to get 40 amps, but should it not match the 50 amp leg of the primary to accomodate the transfer switch pass through in the 2012? What am I missing? In truth, 30 amps would be plenty on the sub panel.
2. I have looked ad nauseaum for a small distribution panel to use as a sub panel with no luck. What have those of you with sub panel installs used?
3. And lastly, for down the road when solar goes in, do you use the same shunt for temp sensors on the solar charge controller and the charger side of the Magnum unit?
Thanks in advance,
Matt
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RoyB
King George, VA
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Check out BLUE SEA products or any of the Marine Suppliers for AC PANELS... They have a bunch of different desgns to choose from... Blue Sea and Jamestowndistributors sell the same products.
I use the WF8900 series Power distribution Center in my POPUP and I have five full size slots to use.
Slot one is the main full size 30AMP circuit breaker.
In the remaining four slots I use half-size circuit breakers to give me what I need to have. I have a total of nine circuit breakers is use if needed. Seems like I have read that five circuit breakers is the maximun you are suppose to be using in a RV electrical code setup.
Lowes had all the electrical circuit breakers I needed to use.
* This post was
edited 04/27/12 09:55am by RoyB *
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smkettner
Southern California
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mhfloyd wrote:1. The WFCO WF8930/50 says to use 20 amp breaker max for individual circuits. I suppose I could use a double gang to get 40 amps, but should it not match the 50 amp leg of the primary to accomodate the transfer switch pass through in the 2012? What am I missing? In truth, 30 amps would be plenty on the sub panel.
Assuming the transfer switch is rated 30 amps just pop in a 30 amp breaker. Do not use parallel breakers and wire to the subpanel.
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3 tons
CA.
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I just used a basic square D type 2 breaker (convertable to 4 via duplex breakers) sub-panel from Home Depot (about $35-40). This is all that is needed to house the breakers and provides power in (inverter output) & individual breakers out. I put the microwave and house plugs on the sub. I have a different brand inverter.
As to question 3, its not clear to me why temp sensors would need to pass thru a shunt. Shunt should be to measure amperage.
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garym114
Bluff Dale, Texas
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I used a Square D QO24L70S load center, 70 amp. I used tandem breakers, two breakers in one slot, because the load center has space for two breakers.
Tandem breakers QOT1515CP or QOT2020CP, 15 or 20 amp.
I guess I have an older style load center because it is not as big as the ones they are showing now for the same model number. There are still some of the smaller ones on eBay.
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mhfloyd
KY
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Yes, size was the main concern. Just don't want to put in a monster 125 rated panel, just physically too big.
3ton, yep, I meant amp meter hook ups.
smkettner, Magnum says the transfer can handle 60 amps. I will be pulling the sub feed off one of the 50 amp legs. There is very little on that leg, no second AC and no washer dryer in the unit, though it is wired for them. The question is if I should make the sub feed and panel a 50 watt capable circuit in order to ensure no problems with the transfer side of things.
I forgot about the Marine side of things and will check there. Hard to find a small panel at Lowe's these days. I don't think size is a concern for them.
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3 tons
CA.
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Assuming shunt is of sufficient amp capacity, should be suitable for both devices.
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mhfloyd
KY
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http://www.magnumenergy.com/Literature/M........rs/64-0007%20Rev%20C%20(MS%20Series).pdf
the manual shows on page 23 to utilize a single in/single out application where source is greater than 30 amps
page 25 shows the wiring diagram that magnum suggests. I am no electrician, but what they show makes me assume that I need to have a 50 amp breaker installed on supply and sub panel to not limit the transfer switch. Am I not seeing this correctly?
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3 tons
CA.
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From what I gather (from PDF) 60 amp is maximum, yes to not limit ATS maximum. However, depending on your loads you could opt for a lower rating, but no higher than 60. JMO...
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smkettner
Southern California
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mhfloyd wrote:smkettner, Magnum says the transfer can handle 60 amps. I will be pulling the sub feed off one of the 50 amp legs. There is very little on that leg, no second AC and no washer dryer in the unit, though it is wired for them. The question is if I should make the sub feed and panel a 50 watt(amp?) capable circuit in order to ensure no problems with the transfer side of things.
I would probably go 40 amp unless you really think you need 50.
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