explosion proof

[jim Ainsworth]

I need to know what the requirements are for making a system explosion proof

 

[roger]

That is a pretty broad question but, for electrical applications falling under the NEC, start with articles 500 through 504 and then you may need to read through 505 to 516.

Roger

 

[jim Ainsworth]

explosion proof

ok , so that's articles 500 through 516 in the NEC codebook?
do i have to buy the thing or is there an online source?
the job requires me to operate my system in a class 1 division II enviorment.
my system takes over control of a grout pumping system and use a relay to control pressure and flow.
do i simply need to enlose everything inside an enclosure?
what about my operating computer?
does that meet the requirement by being in a sealed, gasketed enclosure of it's own?

 

[charlie b]

There is an on-line source. It is not very convenient, with no method for searching, copying, or printing, but it is free. I don't have the exact link, but you can start at www.nfpa.org.

 

[petersonra]

Division 2 is generally fairly easy to deal with, but like a lot of things the devil is in the details.

 

[billsnuff]

google?

google?

http://www.ehawke.com/technical/wiring_systems_nec.html

 

[hotwire1955]

If you don't have the thing (a code book) I don't think you should be doing any kind of electricial installations let alone exp. wiring.:roll:

 

[nhfire77]

Does the NEC apply on drill rigs?

 

[templdl]

I believe that you have to define the atmosphere of the location where the device will be installed. This A-B document does a good job of helping you to defining that.

http://literature.rockwellautomation.com/idc/groups/literature/documents/wp/800-wp003_-en-p.pdf

When you actualy require an explosion proof device the enclosures are built to be explosion proof.

 

[John Valdes]

I like to install the controls in an adjacent room or space that is not classified. Then you only need to concern yourself or your electrican with the raceways.

 

[petersonra]

Does the NEC apply on drill rigs?

That's an interesting question given that many of the oil rigs these days are more like anchored barges than a more traditional platform, and as a marine vessel it would not IMO be subject to the NEC because the NEC says it's not, but some parts are incorporated by federal rules anyway.

90.2 Scope.
(B) Not Covered. This Code does not cover the following:
(1) Installations in ships, watercraft other than floating buildings,
railway rolling stock, aircraft, or automotive vehicles
other than mobile homes and recreational vehicles
FPN: Although the scope of this Code indicates that the
Code does not cover installations in ships, portions of this
Code are incorporated by reference into Title 46, Code of
Federal Regulations, Parts 110–113.