Detached Structure and Disconnect Means

[SeniorInspector]

Can someone explain to me where all the 6 disconnect rules may apply.

Example : If we have a detached structure and it has a 60A panel in it ( lets say a garage ). Can they get away with the 6 disconnect rule or is a disconnect means required at the garage.

In other words, can they have a 6 space panel with single pole breakers in it and no disconnect on the feeders to the seperate structure and still comply with 225.31

Would 225.33 would allow 6 single pole breakers in a sub-panel to the garage above with a disconnection means on the feeders to the sub-panel.

408.36 is met at the panel inside the dwelling and is on a 2 pole breaker so that is met so we are not dealing with overcurrent protection at the detached structure. I am trying to figure out if the 6 throw applies here and no disconnect means needed on the feeders at the new structure.

 

[augie47]

IMHO, Prior to the '08 Code, 408.36 would have required you to meet the 2 pole breaker rule at the detached garage. Under '08 the 6 dsconnect rule would apply.

 

[SeniorInspector]

408.36(A) says on the supply side, I would guess under the 2005 NEC the supply side can be at the main panel feeding the sub-panel. But the question i pose is does 225.31 require a disconnect means at the seperate structure for disconnection of the feeders at the detached sub panel.....not for OCP but just to meet the disconnection requirement.

And if they have a MLO panel does the 6 disconnect rule apply to this panel or only power panels under the 2005 NEC

 

[don_resqcapt19]

The code rule requires that the disconnecting means be suitable for use as service equipment. In many cases this rule requires the use of a single main as many panels are listed as suitable for use as service equipment only when a single main is installed.