Routing Solar Conduit Through Attics

Occasionally due to attic configuration or other challenges some visible conduit is unavoidable.

Routing solar conduit through attics.

Familiarize yourself with the footing situation. Wiring between the roof installation and the inverter runs in metal conduit through the attic and into the garage. Run the wiring conduit through the home so that the overall length of the conduit is minimized. Wrap a conduit strap around the conduit and screw it to the house to secure the conduit.

We have literally hundreds of good photos. I m building a new home outside the city limits in liberty county in texas my electrician ran the main power feed wire from the meter through the exterior wall up into the attic and down into the breaker panel without any conduit. Inside the attic resides a remotely activated switch within 5 ft of where the conduit enters. Check out our website photo gallery if you want to see more.

If this meets code then i will be running attic wiring in this manner from now on. The remotely activated disconnect could also sit outside the attic closer to the array if that is more practical. Get over to the wall above the panel or as close as possible then get outside under the eave and run down the wall with emt. Connect flex to the bottom of that pipe.

Also press a rope of duct seal around the top of the lb to keep water out. Get down into the attic with a short piece of pipe through the roof with a pullbox on top. How id do it if you put your cables to the edge where the apex of the roof meet the ceiling so you basically end up with your wireing loom at the edge of your attic then clip your cables along the ceiling joists 50mm from the plaster board then its clear of insulation and if you need to lay a floor you can but do try to avoide drilling hole through the joists as you will not meet the requirements as youll be less than 50mm from each each edge if the ceiling joists are 75mm. With a flashlight examine the attic and locate the path that you will use to run the wire between the two locations.

I was also under the impression that if wiring is in an attic space that it may need to be derated because it can get very hot up there. A note on conduit. Conduit runs are hidden under the panels and inside attics not run over the top of the roof. Ensure the conduit location in the attic provides at least 18 in.

Of space below the roof deck and is easily accessible for the future solar installer. Ensure there are three or fewer 90 degree turns from the attic to the designated 4 ftx 4 ft plywood area or provide for accessible pull boxes as required by the national electric code.