wire sizing at Higher voltages [RE-wrenches]
Ray Walters
ray at solarray.com
Thu Apr 22 09:13:53 PDT 2004
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HI;
All good points, if the bigger wire doesn't pay for itself, don't do it. My
main point is to look at power drop, not voltage drop. If cost effective
watts are available we should go get em.
Ray
>You have to add the incremental cost of the larger conduit, conduit fittings,
>and the additional labor to handle the heavier wire run. Here in
>California, it
>might even bump you up to the next higher workers' comp bracket. Where
>the PV system gets a rebate, the net installed cost may be under $4/watt.
>Then you have to derate the losses to account for the less-than-full load
>periods (maybe the average loss is 75% of peak power rate).
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