Help with nameplate markings

[Sports One]

Anyone know what the following nameplate markings stand for and where in
the NEC codebook they are discussed:

T1, T2, T3, T4

Any help is appreciated

 

[Louis Bybee]

Anyone know what the following nameplate markings stand for and where in
the NEC codebook they are discussed:

T1, T2, T3, T4

Any help is appreciated

The markings in question are specific lead markings for a utilization device
such as a motor, heater, or transformer etc. You wont find specific
information in the NEC about them that will provide information meaningful
to you.

There are quite a number of very knowledgeable people frequenting this news
group. If you would post additional specifics on the device you have, and
exactly what information you are looking for it would be much easier to help
you.

Louis

 

[SQLit]

For hazardous location motors these are T codes that give the maximum
operating temperature of the motor per Table 500.8(B).
The temperature marking specified in 500.8(B) shall not exceed the ignition
temperature of the specific gas or vapor to be encountered.


Table 500.8(B) Classification of Maximum Surface Temperature

Maximum Temperature Temperature Class
(T Code)
C° F°
450 842 T1
300 572 T2
280 536 T2A
260 500 T2B
230 446 T2C
215 419 T2D
200 392 T3
180 356 T3A
165 329 T3B
160 320 T3C
135 275 T4
120 248 T4A
100 212 T5
85 185 T6

Thanks, I learned something today