(a) Calling by Court. The court may, on its own motion where necessary in the interests of justice or on motion of a party, call witnesses, and all parties are entitled to cross-examine witnesses thus called.
(b) Interrogation by Court. The court may interrogate witnesses, whether called by itself or by a party; provided, however, that in trials before a jury, the court's questioning must be cautiously guarded so as not to constitute a comment on the evidence.
(c) Objections. Objections to the calling of witnesses by the court or to interrogation by it may be made at the time or at the next available opportunity when the jury is not present.
[Adopted effective April 2, 1979.] Comment 614 [Deleted effective September 1, 2006.]