Under which condition can no oil supply line be connected in walls or ceilings?

The correct answer pertains to the condition when no oil supply line can be connected in walls or ceilings if access is not available without cutting. This requirement is essential because it ensures that any necessary maintenance, repairs, or inspections can be performed without significant alterations to the structure. Proper access is crucial for safety and compliance with regulations; if an issue arises, technicians or service personnel must be able to reach the supply line easily to address any concerns or emergencies.

The emphasis on accessibility reflects a fundamental principle in installation practices: lines should be placed in a manner that allows for unobstructed access, ensuring that the system can be maintained over time without the need for invasive measures. This guideline promotes both safety and efficiency, as it enables timely interventions should any problems occur in the future.

Conditions such as insulation, re-routing, or length limitations might have specific considerations in installation practices, but the primary focus in ensuring that a supply line is accessible for maintenance decisively supports the idea that without access, cutting would be necessary, which should be avoided.