14-3 romex in 1/2 " emt ????

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buckofdurham said:
...I might go as far as 8' does that sound like a short section to y'all.
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If we consider a section to be one length of tubing, Wheatland spec's "Applicable tolerances Length: 10 Ft. (3.05 m) +/- 1/4 in. (+/- 6.35 mm)". So perhaps anything shorter than 9' 11-3/4" in length? :D :D :D
 
Smart $ said:
If we consider a section to be one length of tubing, Wheatland spec's "Applicable tolerances Length: 10 Ft. (3.05 m) +/- 1/4 in. (+/- 6.35 mm)". So perhaps anything shorter than 9' 11-3/4" in length? :D :D :D
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Sounds good to me,
 
wbalsam1 said:
A breezeway, often an open roofed porch, that is open to radical temperture differences (exposed to wind and driving rain and other weather conditions) having an EMT raceway (see def. of raceway) enclosing NM-B (not permitted in damp -or wet - locations), in my opinion, is considered outside.
Some breezeways are totally enclosed, including sides that have openable windows, but typically the eaves are outside of the building envelope and as such, are exposed to the weather. :smile:
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I don't see how temperature differences are relevant. If it is exposed to rain, its an issue. If not exposed to rain, I don't see how it is a damp area.

Its sort of like arguing a basement is a damp area simply because the sump pump might fail.
 
petersonra said:
I don't see how temperature differences are relevant. If it is exposed to rain, its an issue. If not exposed to rain, I don't see how it is a damp area.

Its sort of like arguing a basement is a damp area simply because the sump pump might fail.
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If you install a fixture or paddle fan outdoors under a canopy or even in a screen porch both must be listed for damp location. It seem obvious that an open breezeway is damp location. I do, however, question whether there would ever be a problem with nm run in that scenario. But we are talking code and I would guess it is not code compliant.
 
Dennis Alwon said:
If you install a fixture or paddle fan outdoors under a canopy or even in a screen porch both must be listed for damp location. It seem obvious that an open breezeway is damp location. I do, however, question whether there would ever be a problem with nm run in that scenario. But we are talking code and I would guess it is not code compliant.
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The romex is being covered,this is no differance than a bathroom.While the fixture is in damp location the wire is not.
 
petersonra said:
I don't see how temperature differences are relevant. If it is exposed to rain, its an issue. If not exposed to rain, I don't see how it is a damp area.

Its sort of like arguing a basement is a damp area simply because the sump pump might fail.
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I was thinking of NM in a conduit that could experience condensation which in turn would allow moisture into such a conduit. I live in an area where it can be 50 below zero and 100 above depending on the season. Probably wouldn't bother, but the NM is not supposed to get wet. If the paper wrapping around the egc were to get soaked it could eventually corrode the egc and fail during a fault. Taking great care when you install the cable would minimize any potential, but still, it's a code violation if it is considered outside, or in a damp or wet location. :)
 
Originally Posted by Dennis Alwon
If you install a fixture or paddle fan outdoors under a canopy or even in a screen porch both must be listed for damp location. It seem obvious that an open breezeway is damp location. I do, however, question whether there would ever be a problem with nm run in that scenario. But we are talking code and I would guess it is not code compliant.

Jim W in Tampa said:
The romex is being covered,this is no differance than a bathroom.While the fixture is in damp location the wire is not.
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If the "romex" was not exposed, but rather concealed within the ceiling in this breezeway, then the "romex" could be considered in a dry location. (see definition).
But, the luminaire itself would be installed in a damp location, and as such would have to be listed for installation in that type of environment. :smile:
 
buckofdurham said:
If he is sleeving the NM for protection, the EMT is not required to be bonded. 250.86Ex2

I'll still use the connectors and bushings, of course.
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As a sleeve, the EMT is not a raceway, IMO.

We don't provide fittings or bushings at the edge of a nailplate.

Looking at 300.4(F) and 300.4(F) Exception No. 1, together, EMT doesn't need nailplates or a sleeve when used as a raceway, so, is a sleeve in its own right when not used as a raceway.

IMO, connectors and bushings are not required on the end of EMT used as a sleeve.
 
al hildenbrand said:
IMO, connectors and bushings are not required on the end of EMT used as a sleeve.
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300.15(C) 2005 or 2008

(C) Protection. A box or conduit body shall not be required where cables enter or exit from conduit or tubing that is used to provide cable support or protection against physical damage. A fitting shall be provided on the end(s) of the conduit or tubing to protect the cable from abrasion.
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iwire said:
I would still use them anyway, kind of like using a anti short on MC. :smile:
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What about the Arlington insulating bushings? I know they're intended for LV-cable use, but if they're not required, why not use them?
emt50im.GIF
 
speaking from experience....emt will not stop a nailgun. a 16 penny nail will go in one side and out the other in 3/4" conduit.
 
Dennis Alwon said:
300.15(C) 2005 or 2008
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Nice!

Thanks, Dennis. I've changed my opinion. The '08 or '05 Handbooks goes on the add this explanatory text:
Section 300.15(C) permits conduit or tubing to be used as support and protection against physical damage without terminating in a box. It also permits conduit or tubing to be used as physical protection for underground cables that exit from buildings or that are located outdoors on poles, without a box being required on the end of the conduit. A fitting to protect the wires or cables against physical damage is required on the ends of the conduit or tubing.
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As a sleeve, the EMT is not a raceway, IMO.
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It does not matter what it is being used for since the NEC clearly defines "Raceway". It is not what it the application is, it is what the design is and conduit whether used as a sleeve or raceway is still a raceway.
 
ivsenroute said:
It does not matter what it is being used for since the NEC clearly defines "Raceway". It is not what it the application is, it is what the design is and conduit whether used as a sleeve or raceway is still a raceway.
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EMT may be a raceway but it follows some different rules when used as a sleeve then when it is a complete run. art.300.18 NEC 2005 or 2008

Al--- you're welcome
 
ivsenroute said:
It does not matter what it is being used for since the NEC clearly defines "Raceway". It is not what it the application is, it is what the design is and conduit whether used as a sleeve or raceway is still a raceway.
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When used as a sleeve it is not a 'raceway'.

I use 3/4" EMT to hang fixtures, used in this way it is not a raceway.

The application does make a difference.
 
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