2" EMT has 2.067" inside and 3.356 in² of area, so the 40 % fill limit is 1.342 in². It holds 138 × 14, 101 × 12, 63 × 10, 36 × 8 or 26 × 6 AWG THHN. A 60 A EV run (two 6 AWG and a 10 AWG ground) fills it 4 %: it fits.
03 · Conduit fill · Chapter 9 Tables 1, 4 & 5
USE:
2" EMT · 1.6% FILL · PASS
4 conductors take 0.0532 in² of the 3.356 in² inside 2" EMT: 1.6 % against the 40 % allowed.
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| Actions | |||||
|---|---|---|---|---|---|
| 1.2 % | 1.3036 in² | 98 | 61 | ||
| 1.6 % | 1.2892 in² | 96 | 61 | ||
| 2.5 % | 1.2580 in² | 94 | 59 | ||
| 3.9 % | 1.2115 in² | 91 | 57 | ||
| 5.2 % | 1.1692 in² | 87 | 55 | ||
| 8.5 % | 1.0586 in² | 79 | 50 | ||
| 9.8 % | 1.0139 in² | 76 | 48 | ||
| 11.9 % | 0.9443 in² | 71 | 44 | ||
| 15.5 % | 0.8231 in² | 61 | 39 | ||
| 18.1 % | 0.7352 in² | 55 | 34 | ||
| 21.4 % | 0.6248 in² | 46 | 29 | ||
| 25.5 % | 0.4880 in² | 36 | 23 | ||
| 31.4 % | 0.2889 in² | 21 | 13 | ||
| 1.2 % | 1.3025 in² | 97 | 61 | ||
| 3.7 % | 1.2199 in² | 91 | 57 | ||
| 2.0 % | 1.2759 in² | 95 | 60 | ||
| 2.8 % | 1.2493 in² | 93 | 59 | ||
| 3.7 % | 1.2181 in² | 91 | 57 | ||
| 5.1 % | 1.1716 in² | 88 | 55 | ||
| 6.4 % | 1.1270 in² | 84 | 53 |
gnd: Table 250.122 ground. 2" EMT allows 1.342 in² at 40 %.
05 / Field guide
2" EMT has 2.067" inside and 3.356 in² of area, so the 40 % fill limit is 1.342 in². It holds 138 × 14, 101 × 12, 63 × 10, 36 × 8 or 26 × 6 AWG THHN. A 60 A EV run (two 6 AWG and a 10 AWG ground) fills it 4 %: it fits.
2" EMT (Article 358) has 3.356 in² inside. One conductor may fill 53 % (1.778 in²), two 31 % (1.04 in²), three or more 40 % (1.342 in²). A nipple 24" or shorter may take 60 % (2.013 in²): 151 × 12 AWG.
fill % = Σ Table 5 areas ÷ 3.356 in²
2" EMT is 2.197" outside and 2.067" inside, a 0.065" wall; the steel is an equipment grounding path (250.118).
Secure 2" EMT within 3 ft of each box and support it at least every 10 ft (358.30). At 148 lb per 100 ft, each 10 ft span hangs 14.8 lb of pipe. A 60 A EV run leaves room for 91 more 12 AWG THHN; a 60 A subpanel feeder leaves room for 87.
For a mix, add the areas. Two 6 AWG and a 10 AWG ground (a 60 A EV run) take 0.1225 in², 3.7 %; three 3 AWG and an 8 AWG (a 100 A subpanel) take 0.3285 in², 9.8 %.
Questions
101 THHN conductors at the 40 % limit (1.342 in² ÷ 0.0133 in², rounded up by Note 7); 101 current-carrying 12 AWG are derated to 35 % (310.15(C)(1)).
63 THHN, or 55 XHHW (thicker insulation, 0.0243 in² against 0.0211 in²).
Within 3 ft of every box or fitting and at least every 10 ft along the run (NEC 358.30): a 50 ft straight run takes 6 straps, a 100 ft run 11. Keep the bends between pull points to 360° or less (358.26).
Three 6 AWG THHN and a 10 AWG ground take 0.1732 in², 5.2 % of 3.356 in²: that fits the 40 % limit.
2.067 inch nominal (NEC Chapter 9 Table 4), 2.197 inch outside. Use the inside area, 3.356 in², for fill.
300 kcmil THHN: three fit within 40 %.
EMT is the reference: 2" EMT has 3.356 in² inside.