number of spaces in panelboard

[tyha]

we are doing a project that on the engineered drawing it shows a lighting and appliance (by definition in NEC) panelboard that has 42 breakers all 20, 30 amp single poles with 2 "sub-feed" 3 pole 100 and 200 amp breakers for 2 pumps. Is this legal or are we going to need a 2 section panel or a different panel altogether. our vendor quoted us a panel with the sub-feeds in it. they are down on the bottom and not really with the other breakers. I have seen them before but i dont think it was in a panel board with all 20 and 30 amp single poles.

 

[iwire]

Under the 2008 that is OK, under previous codes that is a violation.

 

[Dennis Alwon]

42 circuits are legal and in 2008 there will be no limit to the number of circuits.

The 2008 has done away with a lighting and appliance branch panelboard.

Art. 408.35 2005

 

[Dennis Alwon]

Under the 2008 that is OK, under previous codes that is a violation.

Maybe I am misunderstanding. Are there more than 42 circuits in this panel???

 

[iwire]

42 circuits are legal

The panel has 44 overcurrent devices not including any main.

 

[iwire]

Are there more than 42 circuits in this panel???

42 single pole and two three pole sub feeds.

 

[Dennis Alwon]

42 single pole and two three pole sub feeds.

I thought he was saying 42 in all.

Well then I stand corrected.:grin:

 

[don_resqcapt19]

Lets be careful about the 2008 rule. It doesn't change anything until the listing for the panel also changes.

 

[iwire]

Lets be careful about the 2008 rule. It doesn't change anything until the listing for the panel also changes.

I would expect the panel vendor to be supplying a legal panel.

 

[cadpoint]

Can we throw in a Code reference 408.36 Exception #2 ? NFPA 08'

 

[jim dungar]

I would expect the panel vendor to be supplying a legal panel.

A manufacturer can build and list a panel that will hold 48 circuits (42+3+3). It is up to the installer to obey any applicable codes.

Just because something has a UL listing does not mean it can be installed under the NEC.

 

[joebell]

Bob,

wouldn't this panel be considered as having 48 circuits according to 408.35 in the 2005 code?

Joe

 

[charlie b]

wouldn't this panel be considered as having 48 circuits according to 408.35 in the 2005 code?

Sort of. But more precisely, it would be considered as having 48 overcurrent devices.

 

[iwire]

A manufacturer can build and list a panel that will hold 48 circuits (42+3+3). It is up to the installer to obey any applicable codes.

Just because something has a UL listing does not mean it can be installed under the NEC.

Jim that is kind of a 'no kidding' statement. :roll:

My point was when we get plans for a job and put them out to bid we expect the panel vendors to provide the right equipment for the job at hand.

Of course our project manager should be checking what the vendor is trying to sell us.

For that matter the engineer is the one that specifies the panel characteristics.

 

[iwire]

Bob,

wouldn't this panel be considered as having 48 circuits according to 408.35 in the 2005 code?

Joe

Yes and I said....

Under the 2008 that is OK, under previous codes that is a violation.