Get Appleton Conduit Body Fill Chart

ing to NEC Code 300.17, the following are the limits allowed for conductors based on size and number: One wire can fill no more than 53% of a conduit. Two wires can fill no more than 31% of a conduit. Three or more wires can fill no more than 40% of a 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.

The National Electrical Code establishes that if a conduit only contains 1 wire, the max fill percentage is 53%. If it contains 2 wires, the max fill percentage is 31%. And if it contains 3 or more wires, the max fill percentage is 40%.

DiameterStandard RTRC Spacing DistanceGRC And PVC-coated Steel Support Spacing Distance1″3 ft.12 ft.1-1/4″5 ft.14 ft.1-1/2″5 ft.14 ft.2″5 ft.16 ft.6 more rows • 18 Oct 2022

Allowable Conduit Fill Capacities Size and Type of Conduit14 AWG Wire10 AWG Wire1/2-inch EMT1253/4-inch EMT22101-inch EMT35161 1/2-inch EMT843811 more rows • 5 Mar 2022

The NEC specifications are: One wire: maximum fill is 53% of the space inside a conduit. Two wires: maximum fill is 31% Three wires or more: maximum fill is 40% of the conduit's total available space.

If the removable cover is on top or on the back of the conduit body, it is an LB, with the “B” standing for “back.” If the cover is on the left side of the conduit body, then it is an “LL,” the “L” standing for “left.” If the cover is on the right side of the conduit body, then it is an “LR,” with the “R” standing for ...

The 2020 NEC (National Electrical Code) allows the following in a 1 inch schedule 40 RMC (rigid metal conduit): 12 AWG with Type TW, THHW, THW, THW-2 insulation: 19 wires.