# What is the inside diameter of 1/2 EMT?

Contents

## Is conduit measured by OD or ID?

Tubing is measured by the OUTSIDE DIAMETER (O.D.), specified in inches (e.g., 1.250) or fraction of an inch (eg. 1-1/4″). Pipe is usually measured by NOMINAL PIPE SIZE (NPS). Although it is related to the outside diameter, it is significantly different.

## What is the inside diameter of electrical conduit?

A conduit trade size of 1 inch has an actual inner diameter of 1.049 inches. 2-inch lengths typically have an inside diameter of 2.067 inches.

## How is EMT conduit size measured?

Calculate the total diameter of the wires to determine the diameter of the conduit when placing wires of different gauge and type inside the conduit. Find the wire diameter in table 5 for each gauge wire and type. Multiply the number of wires for each gauge and type by the wire diameter. Total the results.

## How do you measure a conduit pipe?

On the conduit, measure from the free end to be bent up the calculated number and mark the conduit. As an example, to bend 3/4” EMT conduit have a free end height of 8.5”, the table indicates to subtract 6” from the 8.5” which leave 2.5” from the end to bend up to make the mark.

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## What is the OD of 3/4 electrical conduit?

Schedule 40

Trade Size Average OD (in) Minimum Average ID (in)
1/2 0.840 0.578
3/4 1.050 0.780
1 1.315 1.004
1-1/4 1.660 1.335

## What is the id of 1.5 conduit?

Electrical Metallic Tubing (EMT) – Thinwall Conduit