question??? / RHW - IMC Fill

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don_resqcapt19

Moderator
Staff member
Location
Illinois
I thought the -2 suffix meant the dry temperature rating also applies in wet applications.
It does mean that when the conductor has a wet and a dry rating, and that is way I qualified my comment with "for this insulation type".

RHW only has a single rating of 75?C for both wet and dry locations. RHW-2 has a single rating of 90?C for both wet an dry locations. Now if you look at THW, you will find that it has a wet location rating of 75?C and and a dry location rating of 90?C. The addition of the "-2" to the THW does mean that it has a 90?C rating for both wet and dry locations.
 

jusme123

Senior Member
Location
NY
Using the 2008 NEC looking at Table 5 on page 70-676.

RHW-2* = 0.0353

At the bottom of Table 5 on page 70-679 it tells us



Page 70-722 is in Annex C and is not part of the code.
read entire thread, no need for comment
 
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LEO2854

Esteemed Member
Location
Ma
Just to make it clear, the Tables have errors in them and are not part of the code.

If you are being tested you should do the math yourself.
Thanks i know about the tables and when i took my masters there there were 3 questions and answers forced you to do the math:grin:
 
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