Trenching Cables and Wiring PV Array

February 5, 2010

Once we finished installing the 10” steel pipe install for the pole mounted PV panels we next had to get the wires buried. I got a local guy to bring his Kubota back-hoe over to dig a trench from the pole to the electrical room. We then put it in 1” electrical PVC pipe to protect the wires. We pushed several of the 10 gauge cables through as fast as we could and was finished in time for him to grab his John Deere lawn tractor to start back filling.

We then had the Kubota (with a back hoe) dig out a spot out over near the mud room for the future root cellar we plan to have blocked up in the Spring. Just when he was finishing up his front wheels dropped down in a water drain ditch and ripped off his hydraulic filter and within seconds all the fluid was lost. That is why he had to use the John Deere to finish up.

The next day John and I finished connecting the PV panels, grounded each and connected it to the recently pounded in 9′ grounding rod. We then connected 3 PV panels per bank in a series with their MC connectors. There were a total of 4 banks. Next we put a 3’ piece of 2×6 in the ground and mounted the Midnite Solar Combiner disconnect box to it. Installed 5 of the 1/2” strain reliefs in the bottom of the disconnect box for the ground and the 4 banks.

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