Code Questions

[jparker83]

Application is Oil Gas Industrial non hazardous

Under 2005 NEC Code, Article 409.2 Definition, it states

"An assembly of a systematic and standard arrangement of two or more components such as motor controllers, overload relays, fused disconnect switches, and circuit breakers and related control devices such as pushbutton stations, selector switches, timers, switches, control relays, and the like with associated wiring, terminal blocks, pilot lights, and similar components. The industrial control panel does not include the controlled other connected equipment."

So in essence a main circuit breaker controlling relays and terminal blocks are essentially an industrial control panel.

My question is, if I use a circuit breaker for my main, or in other words, as my disconnect that takes the line voltage and distributes it to parts of the panel, does it need a disconnect switch on the outside of the enclosure?

I cannot find this in the NEC Handbook if it requires this or not, and essential I have a disconnect just not on the outside of the door.

I will say that this is only a lighting and control panel/junction box to parts of the project. No motors are being controlled here. Just Click Clack relays to turn on other stuff if switched on.

 

[augie47]

Two things come to mind. As far a external disconnect, I believe you would have to look at the Code regarding the specific item being controlled by your panel and see those specific requirements (as you have done with Art 430)
I think it's also important to note that in addition to the requirements of 409.110 may jurisdictions would require UL or another NRTL sticker prior to accepting.

 

[jparker83]

Well in article 430, it only explains about motors and motor controllers. And really all I am controlling that requires the most load is a floodlight, or a solenoid to dump or allow pressure, nothing big like electric motors.

I am just seeing if it is needed if i already have a main inside the panel, does it require it to be on the door as well.

 

[augie47]

this area may be a handles differently by jurisdictions. What I was refering to in post 2 is that a "assembled control panel" is often designed under a different Code than NEC (NFPA 79) and that is why AHJs often require UL or NRTL listing of such panels to see that it is assembled per NFPA79.
The requirements for such control cabinets ofter vary from NEC.
Applying a NEC rule to a assembled listed control cabinet is not the "norm".

If you designed and fabricated that cabinet and it was shipped to our State, we are supposed to located the NRTL label and once verified, acceot as built.
If it has no listimng, it's not allowed.