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07-01-2019, 07:09 AM | #1 |
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Electrical Question
My 240 volt water heater’s connected to an old style pull handle box with 2 screw in fuses, both 30 amp. The connection at the heater is 2 wire with an additional ground.
I rarely work with 240. My question is, do the 2 30 amp fuses effectively make this a 60 amp circuit? It should only be a 30 amp so I want to reduce the fuse size if necessary. Sent from my iPhone using Winnipesaukee Forum mobile app |
07-01-2019, 07:27 AM | #2 |
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30 on each leg. what you have is fine as long as the wire is at least #10.
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07-01-2019, 10:02 AM | #3 | |
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07-01-2019, 07:18 PM | #4 |
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Thanks for clearing that up. Forgot about “legs”. The wire size isn’t an issue and It is a 100 amp service. Feel better now.
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07-03-2019, 12:06 PM | #5 |
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a 240 30 volt circuit would draw the same as 60 volts of 120 fwiw.
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07-03-2019, 12:27 PM | #6 |
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07-03-2019, 12:36 PM | #7 | |
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Quote:
That comment is a tad confusing.
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07-03-2019, 01:51 PM | #8 |
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07-03-2019, 02:53 PM | #9 | |
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Quote:
240V X 30A = 7200 watts 120V X 60A = 7200 watts most water heaters consume between 4500 and 5500 watts.... going back the other way with that piece of information you see that if all is good in the world, of your 60 or 30 Amp circuit you are really only using 5500 W / 240V = 22.9 AMPs 5500 W / 120V = 45.8 AMPs on the lower side we have 4500W / 240V = 18.75 AMPs 4500W / 120V = 37.5 AMPs so there... now it should be less confussing....
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07-03-2019, 05:49 PM | #10 |
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