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
9
m12
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
4
IP66
4x
IP66
6
IP67
6p
IP68
IP69K - High pres-
sure wash down (up
to 80 bar / 1160psi)
from any angle
Bar
PSI
1
14.5
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
