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60 Per Cent (nipples)
25 Per Cent (seal offs)
Raceway Specs
Minimum Raceway Size
Allowed Raceway area
Available Raceway area
Maximum number of same size wires
(at the Per Cent Fill)
Per Cent Fill
JAM RATIO (for 3 conductors only)
JAM RATIO (between 2.8 and 3.2)

Table 348.22 Maximum Number of Insulated Conductors in 3/8"
Flexible Metal Conduit and Liquid-tight Flexible Metal Conduit*

Types RFH-2, SF-2
Types TF, XHHW,
AF, TW
Types TFN, THHN,
THWN
Types FEP, FEPB,
PF, PGF
Size
(AWG)
Fittings
Inside
Conduit
Fittings
Outside
Conduit
Fittings
Inside
Conduit
Fittings
Outside
Conduit
Fittings
Inside
Conduit
Fittings
Outside
Conduit
Fittings
Inside
Conduit
Fittings
Outside
Conduit
18 2 3 3 5 5 8 5 8
16 1 2 3 4 4 6 4 6
14 1 2 2 3 3 4 3 4
12 - - 1 2 2 3 2 3
10 - - 1 1 1 1 1 2

* In addition, one covered or bare equipment grounding conductor of the same size shall be permitted.
(1) All information is provided in good faith. Punchlist Zero accepts no liability for damages of any kind, directly or indirectly caused by the use of this calculator.
(2) For additional assistance with electrical calculations, please purchase the NEC Code book or an Ugly's reference book