Siemens 4040 versus 4080 panels?

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sw_ross

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NoDak
I know there are 40 spaces in each...,

Does the 4040 only allow full size breakers (no twins?),
While the 4080 would allow twins in all locations in panel? (Potential for 80 circuits)

Thanks
 

sw_ross

Senior Member
Location
NoDak
I encountered a 4040 panel yesterday (manufactured home) that had at least 6, maybe 8 twins in it.

How can that be?
 

GoldDigger

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Placerville, CA, USA
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Retired PV System Designer
I encountered a 4040 panel yesterday (manufactured home) that had at least 6, maybe 8 twins in it.

How can that be?
You can defeat the rejection feature of the bus that prevents installing twins by using twin breakers whose bus interface is identical to the single breakers. (They may cost more.)

Sent from my XT1585 using Tapatalk
 

norcal

Senior Member
You can defeat the rejection feature of the bus that prevents installing twins by using twin breakers whose bus interface is identical to the single breakers. (They may cost more.)

Sent from my XT1585 using Tapatalk

A non-CTL twin breaker does not have the rejection feature. Have seen where someone cut notches in the bus stabs, defeating the intent of the design/listing. :happysad:
 

sw_ross

Senior Member
Location
NoDak
Is it marketing?

Is it marketing?

So, why would Siemens market a 4080 when the 4040 can do basically the same thing?

I'm just trying to better understand the process of choosing the best panel option for the application.

Thanks!
 
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