What should be the condition of all switches during the dielectric strength test for mobile homes?

During the dielectric strength test for mobile homes, all switches should be closed. This is essential because the purpose of the dielectric strength test is to ensure that the insulation and components within the electrical system can withstand high voltage without any breakdown. When switches are closed, the test can accurately assess the integrity of the entire circuit and the effectiveness of the insulation under test conditions.

If the switches were open or in maintenance mode, critical parts of the system could be excluded from the test, which would not provide a comprehensive evaluation of the insulation's resilience. Moreover, disengaged switches could lead to inaccurate results, as the electrical path wouldn't be complete for testing purposes. Therefore, having all switches closed is the proper condition to ensure the safety and reliability of the electrical systems in mobile homes.