Square D panelboard

[RavenJoe]

For any of you electrical equipment distibutors or engineers. Does square D maunufacture 20 amp tandem single pole breakers for a NQOB panelboard ? Ravenjoe

 

[CHDean]

No, tandems are a residential device only. That's why you see loadcenters with multiple circuit designations like 12/24 or 16/32. The higher circuit density is obtained with CTL type tandem breakers. Lighting panelboards such as the NQOD/NQOB are strictly limited to the number of circuits they are nameplated for. Modification voids UL label and warranty.

 

[RavenJoe]

Thank you CHDean.

 

[RavenJoe]

Could I install a subpanel ? This is a 100 amp panel. What size sub panel could I install.

 

[jbartos]

Suggestion: Visit

http://www.aubuchonhardware.com/brands/square_d_co.asp

for more info

 

[CHDean]

Absolutely, a sub-panel is definitely a solution. You will need to determine the total connected load of the existing panel to determine how much room is left for additional loads. The panel you have will accept up to a 100A branch breaker to feed the sub-panel, you may need to relocate some existing loads to the sub-panel to make space for this breaker.

 

[hbendillo]

If you have a hard time finding the information on the Square D site I will say that a 60-amp breaker is probably the largest you could or should put on the panel. A 100-amp frame size is the next size up from a 60-amp frame and with very few exceptions would you be able to put a 100-amp branch breaker in a 100-amp panel.

 

[CHDean]

A 100A QOB should fit but you'd be using as a disconnect only as upstream device would react first in most situations. If you use a smaller breaker you should acheive a better degree of coordination. Without knowing loading, 60A would seem reasonable.