Resolución 2535: adopta el Código Eléctrico Nacional, versión 1993. (Sustituye el Anejo A del Reglamento 4435)

ARTICLE 250 - GROUNDING 70-113 250-26. Grounding Separately Derived Alternating-Current Systems. A separately derived ac system that is required to be grounded by Section 250-5 shall be grounded as specified in (a) through (d) below. (a) Bonding Jumper. A bonding jumper, sized in accordance with Section 250-79(d) for the derived phase conductors, shall be used to connect the equipment grounding conductors of the derived system to the grounded conductor. Except as permitted by Exception No. 4 or No. 5 of Section 250-23(a), this connection shall be made at any point on the separately derived system from the source to the first system disconnecting means or overcurrent device; or it shall be made at the source of a separately derived system that has no disconnecting means or overcurrent devices. Exception No. 1: The size of the bonding jumper for a system that supplies a Class 1, Class 2, or Class 3 circuit, and is derived from a transformer rated not more than 1000 volt-amperes, shall not be smaller than the derived phase conductors and shall not be smaller than No. 14 copper or No. 12 aluminum. Exception No. 2: As covered in Section 250-27 and Exception No. 5 for