UL listing and 110.3B

[Isaiah]

Yes, MTW is in the list in Table 310.4 or 310.104 in the older codes.

There is debate on the question of using MTW in a raceway. Like AWM, MTW is intended for internal wiring within equipment.

A quick search says WTTC is Wind Turbine Tray Cable. I have not seen that before. It that is one of the markings, it is tray cable and you can pretty much do anything you want with it, other that exposed single runs.

Really appreciate the great info again!


Sent from my iPhone using Tapatalk

 

[Isaiah]

Yes, MTW is in the list in Table 310.4 or 310.104 in the older codes.

There is debate on the question of using MTW in a raceway. Like AWM, MTW is intended for internal wiring within equipment.

A quick search says WTTC is Wind Turbine Tray Cable. I have not seen that before. It that is one of the markings, it is tray cable and you can pretty much do anything you want with it, other that exposed single runs.

I just noticed they’re also using TFN wiring for control wiring in conduit.
TFN is not found in 310.4 and is considered fixture wiring. Is this a legit wiring method for this application but poor choice of design?


Sent from my iPhone using Tapatalk

 

[jaggedben]

I just noticed they’re also using TFN wiring for control wiring in conduit.
TFN is not found in 310.4 and is considered fixture wiring. Is this a legit wiring method for this application but poor choice of design?

TFN is legit for Class 1 wiring in dry locations. See post #18 in this thread.

 

[Isaiah]

TFN is legit for Class 1 wiring in dry locations. See post #18 in this thread.

This is being used in wet locations


Sent from my iPhone using Tapatalk

 

[jaggedben]

This is being used in wet locations

Then it's not compliant unless cross listed as something suitable for wet locations, such as MTW.