Unusual Circuit Breaker

[roger]

I disagree. Maybe not the best "interlock", but if the 30 amp is supplying the air handler of an HVAC system, and the 60 amp is supplying the compressor, tripping the 30 amp would make it prudent to kill the compressor, too. Otherwise, the coils in the air handler may freeze and burst. If the 60 trips, shutting down the air handler makes the failure obvious to the humans involved.

Let me think about for a little while and I'm sure I can come up with a reason frogs will still bump their butts even if they had wings.

 

[roger]

BTW, on a more serious note, who makes a 60 amp 120 volt compressor?

 

[retirede]

BTW, on a more serious note, who makes a 60 amp 120 volt compressor?

Who makes a 120V, 60A anything?

 

[ModbusMan]

The logic makes sense to me, but a 120v 60a compressor does not

Who makes a 120V, 60A anything?

Tim "The Tool Man" Taylor

 

[kwired]

But 40 years ago I touched a 3 pole QO with 2 plug-on and 1 bolt-on connections. And, that was back when plug-on and bolt-on used different panels.

That would be interesting to see how that happened. I been in QO assembly plant in Lincoln NE nearly 40 years ago. They were machine assembled then other than the GFCI's were hand assembled. I could see wrong handle ending up in the stock in the machine and it passes through no problems but you would think if you mixed plug on vs bolt on parts in the machine supply bin something likely to malfunction during assembly?

 

[jim dungar]

something likely to malfunction during assembly?

And it had to go through the calibration station after assembly.