DLO Cables

D

dvcraven0522!

Member
Location
St. Louis
Occupation
Electrical Design
Good Morning.

This is a continuation of my previous question relative to DLO cables for an automatic transfer switch. Previous responses suggested that DLO cables are not an approved NEC wiring method. Which I would agree with.

My question today do equipment manufacturer's also have to abide by the same rules and regulations as I an electrical engineer or if I was an electrical contractor as well.

I have attached a shop drawing requiring DLO cables as highlighting.

Thank you for time reviewing my question.

Dan Craven
 

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Birken Vogt said:
FWIW, I think 100% of the DLO that I have run, has also been RHH/RHW type rated.
Click to expand...
A different way to look at the same issue...

DLO Cable In UL 508A Panel?

I have been getting conflicting information as to whether or not diesel locomotive cable is permitted or not permitted for power circuits within a UL 508A industrial control panel. UL 508A 29.2.1 lists Machine Tool Wire UL 1063, thermoset insulated wire UL 44, thermoplastic wire UL 83and...
forums.mikeholt.com

MOST of what is sold as DLO is dual listed as RHH/RHW, so it can be used in UL-508A listed panels. I had ASS-u-me'd that ALL DLO was and bought some from Harbor Freight once in a pinch, learned the hard way that it is not 100%, which is why I said 99%.

That drawing is basically typical of a "lazy" draftsman who didn't check (or bother with) the details...
 
IMHO a better question is why do so many people think "I want DLO" when they want "fine-strand cord that's NEC compliant"? I mean, if they looked in article 400, they'd see W and SC and S but not "DLO"; if they look in the entire 300s they won't find it, either.
 
zbang said:
IMHO a better question is why do so many people think "I want DLO" when they want "fine-strand cord that's NEC compliant"? I mean, if they looked in article 400, they'd see W and SC and S but not "DLO"; if they look in the entire 300s they won't find it, either.
Click to expand...
A lot of it is that DLO is just used as a generic term, but you are correct you won't find "DLO" in the NEC. However a lot of DLO is also marked at RHH or RHW, making it compliant for use in NEC applications.
 
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