Should the AC disconnect be fused when there is NO other breaker in the line? (does the fuse count as protection like a breaker would?)
Must we disconnect just the hots, or also neutral (2 or 3 pole)? And if fused, would I need 2 poles or all 3 (including neutral) to be fused?
My setup:
I have Microinverters into an Enphase Combiner 3 box. A single AC feed from the combiner to the AC Disconnect, and then to the meter directly via line tap (no backfeed breaker).
Screenshot 2020-10-16 163339.png
(pic above shows a 2 pole AC Disconnect, Neutral is pass-through)
Right now I have a 46 Amp setup. The Enphase Combiner has breakers for each array (4 max, 1 shown in pic), but NO breaker out the final output, as you can see. So it directly feeds the AC Disconnect, which directly feeds to the main bus (again, no breaker, no back feed). Is a breaker needed at all? Or is the purpose of the AC disconnect strictly about disconnecting, and not about overcurrent protection? If we need overcurrent protection, would too large a fuse be a problem (say, a 100A fuse rather than 60A in my case with a 46A production)
Do we need overcurrent protection between our PV AC production and the utility meter in order to meet code?
Must we disconnect just the hots, or also neutral (2 or 3 pole)? And if fused, would I need 2 poles or all 3 (including neutral) to be fused?
My setup:
I have Microinverters into an Enphase Combiner 3 box. A single AC feed from the combiner to the AC Disconnect, and then to the meter directly via line tap (no backfeed breaker).
Screenshot 2020-10-16 163339.png
(pic above shows a 2 pole AC Disconnect, Neutral is pass-through)
Right now I have a 46 Amp setup. The Enphase Combiner has breakers for each array (4 max, 1 shown in pic), but NO breaker out the final output, as you can see. So it directly feeds the AC Disconnect, which directly feeds to the main bus (again, no breaker, no back feed). Is a breaker needed at all? Or is the purpose of the AC disconnect strictly about disconnecting, and not about overcurrent protection? If we need overcurrent protection, would too large a fuse be a problem (say, a 100A fuse rather than 60A in my case with a 46A production)
Do we need overcurrent protection between our PV AC production and the utility meter in order to meet code?
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