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Old 11-14-2010, 08:28 AM   #1
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Default Double throw disconnect
Anyone in the boston area got an old (used still good) 30A DT disco for sale?
I need one for a sewer grinder pump set up. single or 3 phase.

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Old 11-14-2010, 09:05 AM   #2
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Anyone in the boston area got an old (used still good) 30A DT disco for sale?
I need one for a sewer grinder pump set up. single or 3 phase.


http://www.affordable-solar.com/QO20...VAC-2-Pole.htm

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Old 11-14-2010, 09:08 AM   #3
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I have a gently used single phase 100amp DT here in Florida. You are welcome to it. Stop by anytime...
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Old 11-14-2010, 09:09 AM   #4
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Anyone in the boston area got an old (used still good) 30A DT disco for sale?
I need one for a sewer grinder pump set up. single or 3 phase.
I think you can even buy that size in a toggle switch frame.
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Old 11-14-2010, 09:10 AM   #5
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I dont understand your sense of humor, but I like it.
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Old 11-14-2010, 09:12 AM   #6
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In the 30 amp size, I've tended to make "automatic transfer switches" from open type DPDT contactors. They're like 30-40 bucks from Grainger. The normal power pulls in the coil. When the normal power goes away, the switch contacts change state and are automatically ready for when the generator starts. You might be using them to pick one pump or another, but you can wire it similarly and just use a toggle switch to change the contacts state.



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Old 11-14-2010, 09:23 AM   #7
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That's a DP not a DT.
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Old 11-14-2010, 09:25 AM   #8
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That's a DP not a DT.


I think I missed that part
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Old 11-14-2010, 11:48 AM   #9
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In the 30 amp size, I've tended to make "automatic transfer switches" from open type DPDT contactors. They're like 30-40 bucks from Grainger. The normal power pulls in the coil. When the normal power goes away, the switch contacts change state and are automatically ready for when the generator starts. You might be using them to pick one pump or another, but you can wire it similarly and just use a toggle switch to change the contacts state.



I did the same thing on my last Generator install, covered a circuit in each of the four other panels for the tenants using that method.

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