NEMA 2018-03-09T14:11:34+00:00

NEMA

National Electrical Manufactures Association

Industry Standard Cross Reference Guide

NEMA LI-1 is the most widely used standard for thermoset composites in sheet, tube, and rod forms in the United States.

NEMA LI-1 “Industrial Laminated Thermosetting Products” was revised in 1999 to mirror MIL-I-24768 with the intention of replacing this Military Specification.

The NEMA Standard provides generic category recognition of grades based on their construction, reinforcement, and resin. Typical properties for each category are defined and published along with standard dimensional tolerances for standard forms of the product. NEMA provides one of the most basic standards for thermoset materials and is often enhanced with customer specific specifications or additional criteria from another standard.

Sheet Grades

Grade Type Description Norplex-Micarta Grades
Fr-4 epoxy glass
flame retardant
NP130
NP130HF
NP510A
Fr-5 epoxy glass
flame retardant
high temperature
MC511FR
G-3 phenolic glass NP504
NP515LS
G-5 melamine glass NP509
G-7 (see note) silicone glass MC507U
G-9 melamine glass NP509
G-10 epoxy glass NP500A
G-11 epoxy glass
high temprature
NP572
MC511AF
MC511A
NP511
NP511EM
C phenolic canvas NP310
NP310HT
NP342
CE phenolic canvas
electrical grade
NP310E
CF phenolic canvas
electrical post forming grade
NP318
L phenolic linen NP320
LE phenolic linen
electrical grade
NP320E
MC320LE
X phenolic paper NP610
XP phenolic paper
punching grade
NP611
NP611R
NP660
XPC phenolic paper
cold punching grade
NP612
NP625
NP664
XX phenolic paper NP629
N-1 phenolic nylon NP101

MC507U does not meet all of the electrical properties of NEMA G-7. Contact us for assistance.

Convolute Wound Tube Grades

Grade Type Description Norplex-Micarta Grades
Fr-4 epoxy glass
flame retardant
RT130
RT130M
RT130X
G-3 (see note) phenolic glass RT504
RT504F
G-5 melamine glass RT505
RT505F
G-7 silicone glass RT507
RT507F
RT507L
G-9 melamine glass RT509
RT509F
G-10 epoxy glass RT500
RT500F
RT500M
RT500X
RT520M
RT520MH
RT520X
RT571
G-10 High Temperature
“G-11” (see note)
epoxy glass
high temperature
RT511
RT511H
RT511F
RT511M
C phenolic canvas RT310
RT310H
RT310S
RT342
RT342H
LE phenolic linen RTB320
RTB320H
RTB320S
RTB320X
RTB320Z
X phenolic paper RT610
XX phenolic paper RT628
RT628H
RT629
XXX  phenolic paper RT630
RT630H
RT630S

Although G-3 tubing grades are recognized by NEMA, ASTM and MIL-I-24768 standards as a material form, property requirements are undefined at this time.

NEMA Standard LI-1 and MIL-I-24768 do not recognize a high temperature epoxy glass convolute rolled tube form, but, these materials are manufactured with a high temperature epoxy resin system, commonly used for NEMA G-11 and MIL-I-24768/27, type GEB sheet products, and do have improved thermal properties at elevated temperatures.

Rolled and Molded Rods

Grade Type Description Norplex-Micarta Grades
Fr-4 epoxy glass
flame retardant
RM130
G-3 (see note) phenolic glass RM504
G-5 melamine glass RM505
G-10 epoxy glass RM500A
G-10 High Temperature
“G-11” (see note)
epoxy glass
high temperature
RM511A
C phenolic canvas RM310
L phenolic linen RM320
RM320H
LE phenolic linen
electrical grade
RM320LE
XX phenolic paper RM629
XXX  phenolic paper RM630

Although G-3 tubing grades are recognized by NEMA, ASTM and MIL-I-24768 standards as a material form, property requirements are undefined at this time.

NEMA Standard LI-1 and MIL-I-24768 do not recognize a high temperature epoxy glass convolute rolled tube form, but, these materials are manufactured with a high temperature epoxy resin system, commonly used for NEMA G-11 and MIL-I-24768/27, type GEB sheet products, and do have improved thermal properties at elevated temperatures.

Does a new design challenge require a unique material solution?
Speak with one of our applications engineers to discuss how Norplex-Micarta’s thermoset composites can be designed your specific application.

Speak with one of our applications engineers