Copyright Goodheart-Willcox Co., Inc.
Rigid conduit comes in the same sizes as water pipe: 1/2 in.,
3/4 in., 1 in., 1 1/4 in., and larger. Note that the measurements given
are inside measurements. Rigid conduit can be cut and threaded with
the same tools used for water pipe.
Unit 10 Basic Wiring Systems 75
Figure 10-13. Running conduit across subfloor.
Figure 10-14. Rigid conduit is threaded like water pipe.