Open-type switchboards

[Microwatt]

240.30A(2) of the 2011 NEC talks about open-type switchboards. What are open-type switchboards? Are they the ones that allow access to the breaker handles without having to actually open a door on the equipment?

 

[infinity]

I beleive that they're referring to something like this. The back is typically open with exposed bus.

 

[dicklaxt]

This isn't what you asked about but it's funny

 

[templdl]

I beleive that they're referring to something like this. The back is typically open with exposed bus.

This may have been mounted on slate.
Arc flash protection obviously was not an issue back then.

 

[zbang]

Try these (NYC subway substation).
http://untappednewyork.files.wordpress.com/2010/10/dsc_1162.jpg
http://untappednewyork.files.wordpress.com/2010/10/dsc_1207.jpg

From:
http://theuntappedshop.com/newyork/2010/10/12/the-53rd-st-power-substation-with-ohny/

 

[templdl]

Try these (NYC subway substation).
http://untappednewyork.files.wordpress.com/2010/10/dsc_1162.jpg
http://untappednewyork.files.wordpress.com/2010/10/dsc_1207.jpg

From:
http://theuntappedshop.com/newyork/2010/10/12/the-53rd-st-power-substation-with-ohny/

Craftsmanship and art.

 

[petersonra]

wonder what the HRC is of those.