Class 1 div 2 drawings

[Davebones]

We have a jet fuel test area . I 've been told this is a Class 1 Div 2 location . When we add or modify anything in this area does it not need to designed by a electrical engineer and documented ? We have a maintenance crew in the plant that decides what to put in with really no oversight !

 

[Rockyd]

Might want to start at 500.5 for an over view....some things are above the paygrade for the risk involved.

 

[weressl]

We have a jet fuel test area . I 've been told this is a Class 1 Div 2 location . When we add or modify anything in this area does it not need to designed by a electrical engineer and documented ? We have a maintenance crew in the plant that decides what to put in with really no oversight !

I don't exactly knoiw what you eman by yet fuel test area, but to me it could imply:

1. fuel handled in open air, Class I, Division 1,
2. fuel burned in the open, classification would be pointless since you have other than electrical ignition source already.

Are classification should be documented. If such documents were approved by the AHJ, there is no reason why competent electricians should not be able to install and maintain the system. (Mind you, the electrician should be competent in Articles 500 and 501.)The NEC is pretty descriptive of the do's in this area.

If the installation uses the Zone method, it should be the continuous supervision of a PE whose expertise is in the subject.

 

[petersonra]

We have a jet fuel test area . I 've been told this is a Class 1 Div 2 location . When we add or modify anything in this area does it not need to designed by a electrical engineer and documented ? We have a maintenance crew in the plant that decides what to put in with really no oversight !

I don't see why any normal electrical work would need to be "designed" as long as it is installed IAW the requirements for the area classification.

Now if you were creating enclosed (or maybe even semi-enclosed) areas inside a div 2 area, I think a look at the thing by someone competent is in order. Or creating an opening into a div 1area. But that is not really electrical work.

But for running conduit and such things, I don't think "designing" is normally going to be required.