Colleagues:
Thanks everyone for the feedback. This is someone else's installation but
I want to know what to say if the inspector questions this part of the system.
William Miller
At 07:20 PM 10/25/2011, you wrote:
Romex sheath is not generally considered much protection. The intent of
th
Romex sheath is not generally considered much protection. The intent
of the code is that the tap wires that are not adequately protected
by the feeder over current protective device have hardened physical
protection. My read is that they need to be in conduit or some
substantial enclosure.
IMHO no one makes a better inverter than Exceltec. However, in these large
stacks the idle current can really add up under low to no loads. You should
look at average draw and do the quick math to see if it makes sense as you'll
need to add additional generation to offset this. To my knowledge t
Dan:
As I read it, the ampacity of the wire need only be 1/3 of the OCP. And
yes, the OCP for this tap is the 200 amp main, although it can be construed
that the circuit breaker at the down-stream end of the feeder provides
protection as well (if you short the bus the feeder is supplying, the
William,
The tap conductor ampacity must not be less than the rating of the breaker
protecting that circuit, which in this case (if I understand the configuration
correctly) would be the main breaker in the panelboard.
Any smaller gauge would require its own OCP device of appropriate rating
if it
Jamie:
Thanks for getting me started. I did not think to consider this as a tap,
but it appears to match the criteria.
William Miller
At 11:38 AM 10/25/2011, you wrote:
William, I would start with Article 240.21(B).
Jamie Johnson
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The sensitivity to AC voltage has not changed in any model of SMA inverter.
The parameters required by UL are still +10% & -12%, in relation to nominal AC
Voltage (240, 208, 277)
The reason that some units may seem more sensitive is that every circuit board
in each inverter is calibrated to the
William, I would start with Article 240.21(B).
Jamie JohnsonNABCEP Certified PV Technical Sales ProfessionalNABCEP Certified Solar PV InstallerGeneral Manager
SOLAR POWER ELECTRIC
Original Message Subject: [RE-wrenches] Feeder without a dedicated breakerFrom: William Miller
Friends:
A prospective client has a 200 amp meter / main / combo. There are only a
few breakers in it feeding the well, the pool house / barn and the
garage. There is no breaker feeding the sub panel in the laundry room that
has all of the branch circuit breakers for the house. Instead ther
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