SkillsUSA preliminary contest Industral Motors Controls Written test Q6

[fmtjfw]

Which wire insulation type(s) can be used in wet locations?

Also Code References?

 

[fmtjfw]

Nobody's going to ding me on type A insulation?

 

[augie47]

Nobody's going to ding me on type A insulation?

Why ding you ? You can list any letter you want as a POSSIBLE answer.
If they don't understand the correct answer or know where to look, "A" is as probable as "C"

 

[don_resqcapt19]

I think there was a type A wire, or maybe A with some other letter, in the older code books.

 

[fmtjfw]

I think there was a type A wire, or maybe A with some other letter, in the older code books.

Yup, Asbestos

 

[GoldDigger]

Definitely not for wet areas!

Sent from my XT1080 using Tapatalk

 

[fmtjfw]

My Answer

My Answer

E

(6) Which wire insulations types can be used in wet locations?
310.10(C) lists the insulation types THWN-2 is the only one in the list. [type A is asbestos]
Code Ref:
310.10(C)
Index:
Wet Locations ? Conductor, types

 

[Dennis Alwon]

It has to have a W to be rated for wet location--- Table 310.104A

 

[fmtjfw]

It has to have a W to be rated for wet location--- Table 310.104A

"E"as in fifth answer (A,B,C,D,E)

 

[Dennis Alwon]

"E"as in fifth answer (A,B,C,D,E)

I know I was just expressing why and giving the art. Hope Mike is okay with this chart being here

 

[Dennis Alwon]

Here is more from the NEC

 

[fmtjfw]

The "W" rule of thumb works except for UF, which according to the code book can be a single conductor.

 

[Dennis Alwon]

The "W" rule of thumb works except for UF, which according to the code book can be a single conductor.

And I bet as a single conductor it may have a W in it. I doubt it is labeled UF

 

[fmtjfw]

And I bet as a single conductor it may have a W in it. I doubt it is labeled UF

Try googling it. I don't see any dual markings. (UFW?)

 

[Dennis Alwon]

I did and this is what came up for UF-B from this site. http://www.cmewire.com/catalog/building/20-BWX-06-UFB.pdf

Features
Listed per UL as type UF-B Cable
Single conductors are dual rated
THHN/THWN-2, meeting 90?C for
Wet and Dry locations

 

[fmtjfw]

I did and this is what came up for UF-B from this site. http://www.cmewire.com/catalog/building/20-BWX-06-UFB.pdf

Service Wire Co.

C(UL) listed Single Conductor Type UF/Type TWU is suitable
for use as Sprinkler Irrigation Control Wire for general purpose
lighting and power. Construction provides solid or stranded soft
annealed copper conductor insulated with PVC that provides
excellent abrasion, acid, chemical, oil and moisture resistance.
? UL listed Type UF 600 Volt (#14 thru 4/0 AWG)
? C(UL) Listed Type TWU 600 Volt (#14 thru 4/0 AWG)

TWU is c(UL) and Canada only

 

[Dennis Alwon]

Service Wire Co.


TWU is c(UL) and Canada only

Not sure what your point is. I showed you single conductor is dual rated thhn/thhw and you quote something from Canada????:?

 

[fmtjfw]

Not sure what your point is. I showed you single conductor is dual rated thhn/thhw and you quote something from Canada????:?

Nope, the wire I quoted is made in USA and is dual rated US and Canada, as is almost all wire produced in North American.

Look at a chunk of #12 THHN /T90/MTW -- you see THHN US; T90 CDN; Machine tool wire

 

[Dennis Alwon]

Nope, the wire I quoted is made in USA and is dual rated US and Canada, as is almost all wire produced in North American.

Look at a chunk of #12 THHN /T90/MTW -- you see THHN US; T90 CDN; Machine tool wire

The wire has a W in it-- Now there may be some company that makes UF single conductor and only calls it UF- I don't know but many clearly use the W