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Old 03-12-2010, 12:11 AM   #1
Ranger9913
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Default Control panel main power switch...what are you using?

I have my control panel and most of my components, just waiting on my SSR's from China. My design has my control panel plugging into my 60A disconnect box using a 240V 50A 4 prong plug. I also have the breaker for an power on/off switch. However, I've been wanting a MAIN power switch on my control panel but I don't believe they make a 50-60A 220V switch. Just curious to what some of you are doing?

I was thinking of using two 30A 220V light switches to control the 110 side L1, and the L2 coming in the control panel.

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Old 03-12-2010, 12:27 AM   #2
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Quote:
However, I've been wanting a MAIN power switch on my control panel but I don't believe they make a 50-60A 220V switch. Just curious to what some of you are doing?
Automation direct sells them up to 600V
http://www.automationdirect.com/adc/...z-_Disconnects

Similar type I use made by A-B.


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Old 03-12-2010, 01:15 AM   #3
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Holy bejesus Claudis, is it easy to find?

I use the 50Amp Spa GFI breaker.

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Old 03-12-2010, 02:27 AM   #4
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I picked up a Square D 30A 300V relay. Apply 120 to the coil to close the switch, and it can deliver 30A @ 300V on 2 poles. Looks like this:

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Old 03-12-2010, 03:24 PM   #5
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Yea, your best bet is a 120v capable switch and a contactor just like above. I've got an E-Stop switch wired like that and its nice to have that protection.

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Old 03-12-2010, 03:35 PM   #6
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Would the above be 30A 300v per pole or 30A 300 total. I need at least a 50A 240v.

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Old 03-12-2010, 05:20 PM   #7
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I'd suggest going to a local electrical supply shop and they should be able to get you what you need. They them you need a 'Normally Open Definite Purpose Contactor' that can handle 50A 250V on 2 poles, with a 120VAC coil voltage (or whatever type of voltage you plan to have available to actuate the coil) I think it would be easier to mount than a switch that could handle that, and you get the satisfying 'clunk' when you actuate it

EDIT: The one I purchased above cost me $25 at a local supply shop, though I see them selling for $40-$75 online.

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