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jtrane
Joined: 24 Jan 2015 Posts: 7
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Link Posted: Sat Nov 26, 2016 10:26 pm Post subject: Wiring gauge for new 30A panel |
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I've been going over the numbers for a while now, and I can't see any reason why you would need to use 14ga wire on the 110v side of the panel. Of course, you need 10ga for the main line and all the element wiring, but nothing else seems like it should draw more than a few amps. Given that, I would think 18ga wire would be sufficient. What am I missing here?
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11116 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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Link Posted: Sat Nov 26, 2016 11:04 pm Post subject: |
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The price difference between 14 and 18 is negligible and 14 gives you more headroom to choose different pumps if you like or change them in the future.
(14 ga = 15 amps, 16 ga = 10 amps, 18 ga = 7 amps).
The 110V fuse in the 30A panels is a 7A fuse to allow bit of inrush current from the two pumps when you first turn them on.
The contactors on most switches will be rated to 10A which means 16 and 14 ga will fit well (tightly/safely). You may have issues getting a good hold with 18 ga.
Good luck!
Kal
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