PMA Reference Guide
Assembly instructions for conduits and fittings
This guide is designed as a reference tool only and not meant to indicate exact
substitutions.
NW PG Metric Conduit Size Conduit ID
mm / in
Conduit OD
mm / in
7 7 m10 ¼“ 6.20 / 0.24 10.00 / 0.39
10 9m12 ³⁄8“ 9.60 / 0.38 13.00 / 0.51
12 11 m16 ½“ 12.00 / 0.47 15.80 / 0.62
17 13.5 m20 ½“ 16.20 / 0.64 21.20 / 0.83
23 21 m25 ¾“ 22.60 / 0.89 28.50 / 1.12
29 29 m32 1“ 29.00 / 1.14 34.50 / 1.36
36 36 m40 1 ¼“ 36.50 / 1.44 42.50 / 1.67
48 48 m50 or m63 1 ½“ or 2“ 47.50 / 1.87 54.50 / 2.15
Common conversions
PMA conduits
Nema IP
12 IP54
12k IP54
13 IP54
4IP66
4x IP66
6IP67
6p IP68
IP69K - High pres-
sure wash down (up
to 80 bar / 1160psi)
from any angle
Bar PSI
114.5
80 1160
100 1450
PMA fittings
Nema vs. IP Rating Bar vs. PSI Panel Cut Out Hole Size
PG mm / in Metric mm / in NPT mm / in
07 12.7 / 0.50
09 15.4 / 0.61 12 12 / 0.47 ¼“ 13.9 / 0.55
11 18.8 / 0.74 16 16 / 0.63 ¾“ 17.4 / 0.69
13.5 20.7 / 0.81 20 20 / 0.79 ½“ 21.6 / 0.85
16 22.8 / 0.90 20 20 / 0.79 ½“ 21.6 / 0.85
21 28.6 / 1.13 25 25 / 0.98 ¾“ 26.9 / 1.06
29 37.4 / 1.47 32 32 / 1.26 1“ 33.7 / 1.33
36 47.5 / 1.87 40 40 / 1.57 1 ¼“ 42.4 / 1.67
48 59.8 / 2.35 50 50 / 1.97 1 ½“ 48.5 / 1.91
63 63 / 2.48 2“ 60.6 / 2.39
General
Length Weight Temperature
1 Foot = 0.305 Meter 1 Pound = 454 Grams C = Degrees Centigrade
1 Meter = 3.281 Feet 1 Pound = 0.454 Kilograms F = Degrees Fahrenheit
1 Inch = 25.4 Millimeters 1 Kilogram = 2.205 Pounds C = (F-32)/1.8
1 Millimeter = 0.039 Inches 1 Gram = 0.035 Ounces F = (Cx1.8)+32
1 Inch = 2.54 Centimeters 1 Ounce = 28.349 Grams
1 Centimeter = 0.394 Inches
