Working with rigid

[darekelec]

Note even close to watertight when used with straight thread couplings. especially in vertical applications. The water runs down the outside of the conduit, hits the top of the coupling and then runs down the treads and ends up inside the conduit.

If field threaded .
In practical terms - how compromised is this threaded connection because of rust after a decade?
Is this a valid reason to use corrosion protection after field threading ?

 

[don_resqcapt19]

If field threaded .
In practical terms - how compromised is this threaded connection because of rust after a decade?
Is this a valid reason to use corrosion protection after field threading ?

The code requires corrosion protection for field cut threads if corrosion protection is necessary. I see rust as corrosion so field applied corrosion protection is required for field cut threads where the conduit is installed in a wet location.

300.6(A) ...Where corrosion protection is necessary and the conduit is threaded anywhere other than at the factory where the product is listed, the threads shall be coated with an approved electrically conductive, corrosion-resistant compound.

 

[Dsg319]

Shoot I’ve been receiving conduit with rust already on the factory threads beneath the thread protector.

 

[hillbilly1]

Shoot I’ve been receiving conduit with rust already on the factory threads beneath the thread protector.

What’s fun, is the rust already inside the conduit! Makes for fun pulls!