What installation challenge might arise with rigid conduit in cold climates?

In cold climates, one of the primary challenges with installing rigid conduit is that materials can become more brittle as temperatures drop. This increase in brittleness can make the conduit more prone to cracking during installation, especially if the conduit is subjected to bending or impact. Cold temperatures can affect various materials differently; metals and certain plastic conduits may lose some of their flexibility and toughness, meaning that care must be taken during installation to avoid damaging the conduit.

In contrast, the other options do not accurately reflect the issues associated with rigid conduit in cold weather. For instance, higher costs related to insulation or improved performance under low temperatures would not be typical concerns specifically tied to the installation of rigid conduit. Additionally, lower temperatures generally do not make installation easier; rather, they can complicate the process due to the nature of the materials becoming more fragile.