Load side taps with branch circuits

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Twisremo

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Location
florida
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electrician
Hey everyone,

The AHJ is telling me that for our 60 amp fused load side tap to pass inspection, the branch circuits need to be relocated from the main service to the sub panel, both panels have a 150 amp main protecting them.

Does this seem correct? Our understanding is that we are covered with 705.12(B)(2)(1)(b)
 
Hey everyone,

The AHJ is telling me that for our 60 amp fused load side tap to pass inspection, the branch circuits need to be relocated from the main service to the sub panel, both panels have a 150 amp main protecting them.

Does this seem correct? Our understanding is that we are covered with 705.12(B)(2)(1)(b)
That doesn't make sense. Why would a tap care which panel it is feed from. Did you tap the service conductors or something else? Are these feeder or branch circuit taps? 240.21(A0 is for branch circuit taps and (B) is for feeder taps
 
A one line diagram would help.

But if the premise wiring consists of service panel -- feeder --main breaker subpanel, and you are interrupting the feeder to splice in a PV (or ESS) supply, then the feeder and the main breaker subpanel are fine.

But the service panel still needs to comply with one of the rules in 705.12(B), and the PV supply is connected via the breaker supplying the feeder. So you either need to put that breaker opposite the utility source and comply with the 120% rule, or comply with the 100% rule (sum of breakers). The latter could be done by moving enough breakers from the service panel to the subpanel.

Cheers, Wayne
 
We really need to know the busbar rating of the service panel to answer the question. If it is only 150A then the inspector is probably right.

Complying with 705.12(B)(2)(1)(b) for the feeder tap does not mean you get to ignore 705.12(B)(2)(3) for the main panel.
 
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