Change List for this Rule


General Order 95


Section X


Supply and Communication Lines in Line Crossings or Conflicts


104    Insulators for Supply Conductors


Where grounded pins and insulators with grounded bases are used at crossings with ungrounded construction being used at other parts of the line, the insulators used on such grounded supports shall have a rating of 25% greater than the flashover voltage values of the line insulators used on ungrounded pins, except where these values exceed those specified in Table 12 , Rule 55.3 by 50%. As an alternative, the conductors at their points of attachment, where suspension insulators are used, may be protected by arcing shields.


Note:    Revised January 19, 1994 by Resolution SU–25.