They are not subject to mechanical damage in.
Conduit in attic versus crawl.
Crawl space today with a few guys i work with.
Does wire run in conduit in a crawl space need to be rated for moisture.
Everyone including myself preferred to have the ductwork in the attic as opposed to the crawl space.
This is especially true when you need to curve the wires around a bend which further limits the space inside the conduit.
As far as the other subject to mechanical damage.
Seal supply boxes with mastic.
Interpretation of conduit vs raceway wet location vs outdoor vs nm nm b.
I was just discussing the issue of attic vs.
Spacing is a major factor in deciding whether to use conduit.
Compare that with the daily 140 degree temperatures found in vented attics.
The volume of regulators inside the conduit is limited by code so it might not work to use conduit.
I vote for the attic.
As the cable on exterior become accessible needs the conduit ditto for the portion from the inverter into the attic is accessible and was run in emt until above 8 foot and then could be considered inaccessible.
Active 1 year 5 months ago.
Insulate and air seal the floor with open cell foam put ductwork and mechanicals in the attic install a radiant barrier and mastic seal the ducts.
Choices besides uf b wet damp location not inside conduit.
Knowing the disadvantages of attic install and the crawl space install.
Strap ducts out of insulation with 3 ductstraps per specifications.
Rarely will a sealed foam insulated attic deviate more than 15 degrees from the living space temperatures below it.
So when we have a choice we prefer hvac systems located under the house.
The outer jacket was removed to expose the wires when run inside the emt conduit.