K.O. Layout

[tallgirl]

I'm in the midst of designing a control panel and wanted some opinions.

I need to have a 1" KO for a communications cable to pass through. The way I've laid it out, I have a pair of 1/2" KOs on both sides of a 1" KO. Anyone have opinions about how much clearance is needed between the 1/2" and 1" KOs for turning a wrench? I think that most of the time the 1" KO will be filled with a plastic grommet, so I'm not worried about clearance for tightening EMT fittings, but I'd like to make sure I'm leaving space enough in the event the panel isn't installed as I expect. The area I've reserved for these three KOs is 6" wide by 4 1/2" deep.

 

[sameguy]

How about no KOs, we will cut them in.

 

[kingpb]

I assume this panel falls under requirements of Article 409?

 

[tallgirl]

How about no KOs, we will cut them in.

No, because people who don't own the tools to cut KOs will be buying them. That and I hope they look pretty before, during and after installation

 

[tallgirl]

I assume this panel falls under requirements of Article 409?

Nope. "Control Panel" was probably the wrong term to use since that has a meaning under Article 409 that's not at all what this enclosure will be doing.

 

[iwire]

This page http://www.powerstrut.com/psjan2005/fibergl183.jpg has the info for EMT

A lot more helpful info can be found here http://www.powerstrut.com/technical.html

 

[tallgirl]

This page http://www.powerstrut.com/psjan2005/fibergl183.jpg has the info for EMT

A lot more helpful info can be found here http://www.powerstrut.com/technical.html

Thanks! I knew this forum was good for something

I have 1 1/2" spacing right now and it looked too tight. I am going to increase it to 1 3/4" as recommended.

 

[iwire]

Thanks! I knew this forum was good for something

:lol:

I stumbled on to that site a while ago and use it fairly often.

 

[tallgirl]

:lol:

I stumbled on to that site a while ago and use it fairly often.

Yeah, I stumbled on =this= site about 6 years ago and use it fairly often now as well

Who'd a thunk Julie would be working with real electrical contractors on real projects way back then? Boggles the mind, I tell you.

 

[iwire]

Who'd a thunk Julie would be working with real electrical contractors on real projects way back then? Boggles the mind, I tell you.

:jawdrop:


Kind of scary.

 

[tallgirl]

:jawdrop:


Kind of scary.

Heh. Scary is climbing a turbine tower in a wind storm.

I should have CAD drawings for my new box tonight or tomorrow, then off to the sheet metal peeps for fabrication!!!

 

[tallgirl]

Heh. Scary is climbing a turbine tower in a wind storm.

I should have CAD drawings for my new box tonight or tomorrow, then off to the sheet metal peeps for fabrication!!!

The first prototype came back Just Fine -- screw on cover rather than hinged. I'm off to see the company that's going to be making these in bulk a bit later on this morning and I hope to have something I can show y'all.

They have a set of dual K.O. stampy-things -- they can do two different sizes in one location.

The panel was re-organized and I need to redraw the new K.O. locations, but now that I know what I'm doing I should be able to finish it over a pot of coffee.