Using a distibution block in a single disconnect circuit breaker panel 480 vac

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Todd Gaudet

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Roseville, ca
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I have a circuit single breaker inside a panel that feeds a piece of equipment. I would like to install a power distribution terminal block in the panel and have the 480 vac feed the existing breaker and feed another piece of equipment at the location. The 480 vac will come off the terminal block and out the panel to feed the new piece of equipment. Is this ok to do. Also is it ok to pigtail in a breaker panel. Only has one breaker in the panel and is a 20 amp breaker. I would be bypassing the 20 amp breaker and coming off the main breaker which is 60 amps. Any information would be much appreciated.

Thanks,
Todd​
 
Todd Gaudet said:
[h=2][/h]
I have a circuit single breaker inside a panel that feeds a piece of equipment. I would like to install a power distribution terminal block in the panel and have the 480 vac feed the existing breaker and feed another piece of equipment at the location. The 480 vac will come off the terminal block and out the panel to feed the new piece of equipment. Is this ok to do. Also is it ok to pigtail in a breaker panel. Only has one breaker in the panel and is a 20 amp breaker. I would be bypassing the 20 amp breaker and coming off the main breaker which is 60 amps. Any information would be much appreciated.

Thanks,
Todd​
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Need more info. on the breaker panel.
 
How about a 60 amp bus box hanging on the 60 amp breaker and individual load breakers hanging off the bus box..

dick
 
The 60 amp breaker is at the main breaker panel. The 60 amp breaker feeds the circuit that is near where I need to install this piece of equipment. I would be bypassing the 20 amp that feeds the battery charger and utilizing the 60 amp breaker. All equipment on this circuit would not exceed the 60 amp breaker. The equipment being installed has it's own fusing and overload protection. Can I install a terminal block inside the 20 amp circuit breaker panel and have the line side coming in and branch off to the circuit breaker and conduit out to the other piece of equipment. This is 3 phase 480 vac.

Thanks again!
Todd
 
I don't fully understand where you want to install the distribution block.

I would probably install it in its own enclosure and then run separate raceway or cable to each piece of equipment. Your 60 amp circuit is a feeder, and you can reduce conductor size to equipment as long as feeder tap rules are met. I am assuming the 60 amp circuit also has 60 amp conductors. Consider using Polaris or other similar insulated taps instead of a distribution block - they are pretty convenient and generally not much different in cost depending on type of block you are talking about.
 
It would make it easier to install the terminal block inside the 20 amp panel. I would have the 480 vac coming into the terminal block and have 2 separate conductor openings for L1, L2, L3 on the load side. 1 for the 20 amp breaker and 1 for the new equipment install. Would it be to code to do this?

Thanks,
Todd
 
If you splice in a separate enclosure, you likely have easier time moving, replacing, or even adding additional equipment, or eliminating one of your existing equipment someday.

Is it code compliant to do what you propose? maybe. Is your equipment still listed if you add something like this to it - something to think about.
 
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