129.326—Dual-voltage generators.
If a dual-voltage generator is installed on an OSV—
(a)
The neutral of the dual-voltage system must be solidly grounded at the switchboard's neutral bus and be accessible for checking the insulation resistance of the generator; and
(b)
Ground detection must be provided that—
(1)
For an alternating-current system, complies with § 111.05-27 of this chapter; and
(2)
For a direct-current system, complies with § 111.05-29 of this chapter.