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12 gauge is thicker than 20 gauge. The lower the gauge, the thicker the sheet metal or wire.

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Q: Which is thicker 12 gauge or 20 gauge?

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When it comes to the measurement gauge, the smaller the number the thicker or heavier the material.For instance:10 gauge steel is thicker than 18 gauge steel.A 5 gauge needle is much larger than a 10 gauge needle.A 12 gauge shotgun is larger than a 20 gauge.

12 gauge the higher the gauge the thicker the item is

yes

The metal of the 17 gauge waste drain is thicker than the 20 gauge.

16 gauge is thicker. The lower the number the thicker the materiel.

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12 Gauge is thicker then the 20 gauge.

20 gauge is thicker (the lower the number, the thicker the steel).

The 12-gauge is thicker.

When it comes to the measurement gauge, the smaller the number the thicker or heavier the material.For instance:10 gauge steel is thicker than 18 gauge steel.A 5 gauge needle is much larger than a 10 gauge needle.A 12 gauge shotgun is larger than a 20 gauge.

Yes, much thicker.

12 gauge the higher the gauge the thicker the item is

12 gauge.

yes

Nope. It's the other way around. (the lower the number, the thicker the steel).

The metal of the 17 gauge waste drain is thicker than the 20 gauge.

The lower the gauge the heavier, sheet metal, wire & shotguns...

12 guage wire israted for 20 amps and 10 guage is rated for thirty amps! 12 gauge is what is required, as it is rated for 20 amps. 10 gauge is rated for 30 and will be more then enough. Oversizing wire in your case isn't necessary. The thicker 10 gauge wire is harder to work with and will more then likely cost more.