[Squeak]

I want to install a portable generator with an interlock switch on my main panel. However, my main panel does not have a main switch to it because I have a disconnect panel outside by the meter.

Is there any harm in installing a main switch in my indoor panel so I can then install an interlock switch? It would mean I have two main switches on the same system.

 

[jbfan]

If you are asking can you install a main breaker in your panel so you can do an interlock, the answer is yes.
Can you panel have a breaker installed depends on the brand and model.

 

[Squeak]

If you are asking can you install a main breaker in your panel so you can do an interlock, the answer is yes.
Can you panel have a breaker installed depends on the brand and model.

Oh, yeah the panel can accept a main breaker — the cutout is there.

I was asking more about code and if there is an issue in having two mains in sequence.

 

[Let it Snow]

If you are asking can you install a main breaker in your panel so you can do an interlock, the answer is yes.
Can you panel have a breaker installed depends on the brand and model.

No code issue. I always install sub panels with a main breaker. For one reason, it's safer to work on knowing the main is off and right in front of you.

 

[afjes2015]

Oh, yeah the panel can accept a main breaker — the cutout is there...

Best to double check and not just go by if the panel has a cut out (punch out). I have seen some manufacturer's of panels use a generic cover that would be used for several of their model panels where the panel cover has a punch out but no breaker spot available.


If you are comfortable taking off the panel cover do so carefully and just verify that their is a spot for a main breaker.


Just a heads up for you.

 

[Wiredindallas]

Be sure the interlock switch device is compatable with your panel/main breaker. Arrangement of the 2 breakers is critical.