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551.60 Factory Tests (Electrical)
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Each recreational vehicle designed with a 120-volt or a 120/240-volt electrical system shall withstand the applied voltage without electrical breakdown of a 1-minute, 900-volt ac or 1280-volt dc dielectric strength test, or a 1-second, 1080-volt ac or 1530-volt dc dielectric strength test, with all switches closed, between ungrounded and grounded conductors and the recreational vehicle ground. During the test, all switches and other controls shall be in the "on" position. Fixtures, including luminaires and permanently installed appliances, shall not be required to withstand this test. The test shall be performed after branch circuits are complete prior to energizing the system and again after all outer coverings and cabinetry have been secured. The dielectric test shall be performed in accordance with the test equipment manufacturer's written instructions.
Each recreational vehicle shall be subjected to all of the following:
- A continuity test to ensure that all metal parts are properly bonded
- Operational tests to demonstrate that all equipment is properly connected and in working order
- Polarity checks to determine that connections have been properly made
- GFCI test to demonstrate that the ground fault protection device(s) installed on the recreational vehicle are operating properly
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