Feeding multiple sub panels 1 breaker

[jaygil13]

How's it going? Our company is currently doing an engineered residential service. There are several panels. Coming out of the 800 amp MDP we are feeding 3 panels with 1 set of 4/0 copper. Each panel has 2 neutral lugs, and 2 lugs ( each lug rated for 2 4/0 +/-).

It all makes sense but I was curious if that falls under the tap rule (not to familiar). We generally come out of the mdp for each sub panel. I am new to this forum. Thanks for your time and expertise.

Jason

 

[jaygil13]

Is there any footage 10' 25' or it doesn't matter?

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[ptonsparky]

What is the protection at the MDP FOR the 4/0s?

 

[jaygil13]

225a

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[jaygil13]

So it from mdp 4/0 to first panel, from first to second panel with 4/0, and second panel to third panel 4/0. Daisy chained each 4/0 sharing a lug (rated for the purpose). We generally don't feed panels like this. Just want to make sure I don't over look anything thanks again

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[jaygil13]

225a

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From mdp to panel 1 it's 4/0, from panel 1 to 2 it's 4/0, and from panel 2 to 3 it's 4/0. Daisy chained. Each lug is rated for the purpose. We generally don't feed panels like this and I want to make sure I'm not missing anything thanks again

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[ptonsparky]

4/0 is rated at 230. IMO, you're good as far as the wire is concerned. You are not taping a tap if that is what you are concerned about.

 

[jaygil13]

Thanks i appreciate it.The whole tapping was my main concern. Not familiar with the subject, or feeding panels in this manor.

 

[John120/240]

What is the protection at the MDP FOR the 4/0s?

225a

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So using a 225A breaker for 3 panels. What is your total connected load ?

 

[jaygil13]

The loads not the concern. It's all engineered and they have it layed out down to every branch circuit. But there's multiple locations where we feed 3 panels like this.
We usually feed every sub panel out of the MDP for the most part on our other jobs like this. Is this a normal practice

 

[ptonsparky]

The loads not the concern. It's all engineered and they have it layed out down to every branch circuit. But there's multiple locations where we feed 3 panels like this.
We usually feed every sub panel out of the MDP for the most part on our other jobs like this. Is this a normal practice

No different then using feed thru lugs on opposit ends of the buss bars. Normal enough, I would say.