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Conduit Size

When it comes to electrical conduit, size does matter. The wrong size conduit can create problems with your electrical system, so it's important to choose the right size for your needs.

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When it comes to electrical conduit, size does matter. The wrong size conduit can create problems with your electrical system, so it’s important to choose the right size for your needs. Here’s a look at what you need to know about conduit size so you can make the best choice for your home or business.

Conduit is available in a variety of sizes, so it’s important to choose the right size for your needs. The wrong size conduit can create problems with your electrical system, so it’s important to choose the right size for your needs. Here’s a look at what you need to know about conduit size so you can make the best choice for your home or business.

Conduit Diameter Chart

Conduit Diameter Chart

Outside Diameter of Conduit
Size EMT IMC Rigid
Decimal Fraction Decimal Fraction Decimal Fraction
1/2″ 0.706 11/16 0.815 13/16 0.84 13/16
3/4″ 0.922 15/16 1.029 1 1.05 1-1/16
1″ 1.163 1-3/16 1.29 1-5/16 1.315 1-5/16
1-1/4″ 1.51 1-1/2 1.638 1-5/8 1.66 1-11/16
1-1/2″ 1.74 1-3/4 1.883 1-7/8 1.9 1-7/8
2″ 2.197 2-3/16 2.36 2-3/8 2.375 2-3/8
2-1/2″ 2.875 2-7/8 2.857 2-7/8 2.875 2-7/8
3″ 3.5 3-1/2 3.476 3-1/2 3.5 3-1/2
3-1/2″ 4 4 3.971 4 4 4
4″ 4.5 4-1/2 4.466 4-7/16 4.5 4-1/2
5″ 5.563 5-9/16

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