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I have three 240V 2 pole circuits...BUT

Discussion in Universal Transfer Switch started by Gary , 2/23/2015 1:00 AM
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I have three 240V 2 pole circuits...BUT

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  • I recently purchased the APC UTS 10BI.  My problem is my main panel has three different 240V pole circuits, and each one is different.  One has two 15 A breakers for the extra basement heater (not used much at all).  Another has two 20 A breakers for the extra oven in the kitchen.  The third has two 30 A breakers for the electric drier.  I'm still not sure about what I "want" to use for the 240, but is it safe to use any of the circuits even if the breakers are not 20A?

    Thanks in advance!

  • Hello,

    Our resident UTS expert said: All you need are two 120VAC legs 180º out of phase. Circuits 9 and 10 will then be limited by the amperage of the circuit breakers in the panel.

  • Thanks Angela,

    One more thing.  I see in the specs. that a "total" of 100 A is only allowed as the output.  Does this mean that I could only hook up 100 A?  For example, If I hook up five 20A curcuits, I reached my limit.  I stayed in the 20A max per circuit, but I still have 3 more circuits that can't be used because I exceeded my limits.  Am I getting this right?



  • Hi Gary,

    In checking, yes, the panel is intended for 100A max but with all your 20A circuits, you'd likely never max them all out to get close to 100A. The panel will work with 20A circuits no problem (and compensate however it needs to) and we'd say hook them all up and the panel will manage the rest. I think you also should be getting 20A fuses to replace the standard 15A fuses that come in the panel. I also asked and apparently doing this for this type of panel would not be against any type of electrical code or anything (but I don't know if you have electrician to verify that for your locality.

  • Sorry, this is the "one more thing".  I'm getting ready to call the electricians for a price, but I'm going over the circuits and not too happy with what I see.  My house has enough circuits to sink a you know what.  With three bedrooms, each has a circuit for lights, a circuit, for outlets, and a circuit for the window A/C.  The living room has two circuits (lights and outlets), and the same thing for the dining room.  Then we get to the kitchen.  There are three circuits, (lights, counter, and fridge).  Finally we get to the basement, which has the furnace, lights, and outlets.  I never even mentioned the bathrooms (all have separate light/outlet circuits).  I know that I can't have everything, but I also see that I'm not even getting close only having 8 circuits because there are three other people living in this house, and their opinions also count.  

    Therefore, here is my question:  Is there any way an electrician can tie some of the circuits together in another box, before it gets to the UTC?  For example, If I can tie the lights and outlets together for each room it would be wonderful!  I do use multiple high hat lights in each room, and I'm using the Honda EU7000 Generator.

    Thanks again for all your help!

  • Hi again Gary,

    We don't believe this would be possible - it is probably illegal and  would not meet safety regulations. But to be certain, it'd be a question for the electrician to confirm or deny for your locality.

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