Presence of hazardous gases or vapors

Originally Posted By: jtedesco
This post was automatically imported from our archived forum.



Fact


Raceway Seals.

Conduits or raceways through which moisture may contact live parts are required to be sealed or plugged at either or both ends.

FPN: Presence of hazardous gases or vapors may also necessitate sealing of underground conduits or raceways entering buildings.

This is an important rule and was added long ago because of the hazardous gases and vapors present in underground areas around dumps!

Duct seal usually does the job.


Originally Posted By: jfarsetta
This post was automatically imported from our archived forum.



Joe,



Are you referring to intrinsically safe devices and wiring methodologies?

There are many industrial applications where rigid/threaded conduit is required for electrical wiring.

I-Safe was the norm in many of the environments I have worked or designed in. This included high-tension and low-tension applications.

But... it has nothing to do with residential applications or inspections. ![icon_wink.gif](upload://ssT9V5t45yjlgXqiFRXL04eXtqw.gif)


--
Joe Farsetta

Illigitimi Non Carborundum
"Dont let the bastards grind you down..."

Originally Posted By: jtedesco
This post was automatically imported from our archived forum.



No. Has nothing to do with IS Systems, very specific to dwellings built near, or over the old dumping grounds.


The original proposal asked for an explosion proof seal off and the results were voted to just provide a fine print note. The issue was related to Methane Gases, and a search on the net show where this was and still may be a problem.


--
Joe Tedesco, NEC Consultant

www.nachi.org/tedescobook.htm