• We will be performing upgrades on the forums and server over the weekend. The forums may be unavailable multiple times for up to an hour each. Thank you for your patience and understanding as we work to make the forums even better.

334.12(B) Common Violation….

J

jap

Senior Member
Occupation
Electrician
rc/retired said:
That's where the problem lies. An old timer once told me, "It's not a mistake if you don't tell anyone"

Ron
Click to expand...

Oh it's definitely still a mistake even if you don't tell anyone.

The good thing about telling others about your mistakes is you begin to realize everyone is making them. :)

Jap>
 
G

gene6

Senior Member
Location
NY
Occupation
Electrician
jap said:
Well I've seen a close nipple, and, I've seen a chase nipple, but,,,, a "close chase nipple"? Lol.,,

Jap>
Click to expand...
Yeah probably not the right term but this is what we used to bring NM into the back of an exterior panel;
1731084424912.png
 
A

AC\DC

Senior Member
Location
Florence,Oregon,Lane
Occupation
EC
infinity said:
Yup red tape is the bane of progress. We had a tiny bridge over a creek that got damaged in a storm. It took 2 years of site planning, environmental review, bidding, and contractor approval just to put back the same bridge. Right before construction was to begin they halted the project and said that they could not start until they had a bat impact study. 🦇 That took another year. It took almost 4 years to replace a bridge that the Chinese would have finished in a month. :mad:
Click to expand...
Well if China made it in a month it’s probably will last a few days pass it’s warranty
 
Last edited:
petersonra

petersonra

Senior Member
Location
Northern illinois
Occupation
engineer
infinity said:
Yup red tape is the bane of progress. We had a tiny bridge over a creek that got damaged in a storm. It took 2 years of site planning, environmental review, bidding, and contractor approval just to put back the same bridge. Right before construction was to begin they halted the project and said that they could not start until they had a bat impact study. 🦇 That took another year. It took almost 4 years to replace a bridge that the Chinese would have finished in a month. :mad:
Click to expand...
The boys from West Virginia could have gone it in a few days.
 
B

Birken Vogt

Senior Member
Location
Grass Valley, Ca
infinity said:
🦇

A grommet cannot be used in lieu of a connector.
Click to expand...
Most common way you find them around here. I know it is not code but there seems to be no hazard associated with it. Being as how you can do the same thing with any nonmetallic switch box and the strange exception for a bunch of bundled NM leaving the panel in a short vertical conduit before going its way.
 
L

letgomywago

Senior Member
Location
Washington state and Oregon coast
Occupation
residential electrician
Seven-Delta-FortyOne said:
…..At least in my area.

Surface mounted exterior panel, someone wants to add a circuit, and they run a short piece of pvc conduit down the outside of the house with romex inside, attached to the siding, and then LB into the crawl space.

See it all the time. But it should transition from THWN-2 to romex, either in a box or in the LB if it’s listed for that.

You guys see this a lot?
Click to expand...
It's common I try to avoid It but multiple states have an amendment for just this with some requirements to seal the TA or connector with duct seal. I don't sweat it but try not to do thus without SER or UF.
 
Dennis Alwon

Dennis Alwon

Moderator
Staff member
Location
Chapel Hill, NC
Occupation
Retired Electrical Contractor
Seven-Delta-FortyOne said:
Nothing, that I know of.

Except it’s a violation of the Holy NEC. 🙄😡

I understand not using Romex underground, or in truly wet locations, but we come out into panels, boxes, and condulets that are outside all the time.
Click to expand...
Think about it. Would you prefer the thin jacket of nm underground to UF. Imo, that is the biggest reason for UF in the ground. Nm has been in soaking wet crawl spaces for ever. I have been in some crawl spaces where the insulation is dripping water.

Perhaps the difference is that nm sitting in a conduit horizontally makes for the cable to be sitting in water. NC has agreed to allow NM cable in a conduit if it is 6' or less. Think a/c units and heat pumps...


300.9 Raceways in Wet Locations Above Grade.
Click to expand...

Where raceways are installed in wet locations above grade, the interior of these raceways shall be considered to be a wet location. Insulated conductors and cables installed in raceways in wet locations above grade shall comply with 310.10(C).
Click to expand...

Exception: The interior of these raceways shall not be considered a wet location if: (1) The section of raceway routed in a wet location above grade does not exceed 1.8 m (6 ft) in length; (2) Any fittings or conduit bodies are watertight and listed for use in wet locations; and (3) All termination points of the raceway are only open in any of the following: a. A dry location; b. Equipment suitable for outdoor use; or c. Equipment listed for use in a wet location.
Click to expand...
 
Dennis Alwon

Dennis Alwon

Moderator
Staff member
Location
Chapel Hill, NC
Occupation
Retired Electrical Contractor
I also believe that the manufacturer of nm is only required to use 90C insulation. It does not say it must be wet rated. I suspect most of it is thwn-2 but IDK.
Not sure what happens if thhn-2 is used in wet locations as opposed to thwn-2
 
Dennis Alwon

Dennis Alwon

Moderator
Staff member
Location
Chapel Hill, NC
Occupation
Retired Electrical Contractor
Another issue is if they use thhw then the conductor would only be rated 75C in wet locations. It gets complicated.

I also have seen 10/2 nm in the ground for over 30 years and still going.
 
You must log in or register to reply here.
Top