FIG. 01 — INDEX

What Size Conduit for Romex / MC / UF-B?

Sleeve-sizing pages for the 10 most-pulled NM-B, MC, and UF-B cable sizes. Each page shows the smallest EMT, PVC, RMC and flex trade size for 1, 2, or 3 cables — using the NEC Chapter 9 Table 1 Note 9 single-conductor treatment.

FIG. 02

ROMEX (NM-B) — Article 334

01 · OD 0.346"

14-2 NM-B

1× → 1/2" EMT

02 · OD 0.394"

14-3 NM-B

1× → 1/2" EMT

03 · OD 0.380"

12-2 NM-B

1× → 1/2" EMT

04 · OD 0.430"

12-3 NM-B

1× → 1/2" EMT

05 · OD 0.470"

10-2 NM-B

1× → 3/4" EMT

06 · OD 0.530"

10-3 NM-B

1× → 3/4" EMT

07 · OD 0.640"

8-3 NM-B

1× → 1" EMT

08 · OD 0.770"

6-3 NM-B

1× → 1-1/4" EMT

FIG. 03

MC CABLE — Article 330

01 · OD 0.520"

12-2 MC

1× → 3/4" EMT

FIG. 04

UF-B (Underground Feeder) — Article 340

01 · OD 0.450"

12-2 UF-B

1× → 1/2" EMT