![]() (3) Bare Aluminum or copper-clad aluminum grounding electrode conductors external to buildings or equipment enclosures shall not be used where in direct contact with masonry or the earth or where subject to corrosive conditions. (2) Terminations made within outdoor enclosures that are listed and identified for the environment shall be permitted within 450 mm (18 in.) of bottom of the enclosure. (1) Bare or covered conductors without an extruded polymeric covering shall not be installed where subject to corrosive conditions or be installed in direct contact with concrete. (A) Aluminum or Copper-Clad Aluminum Conductors. Grounding electrode conductors at the service, at each building or structure where supplied by a feeder(s) or branch circuit(s), or at a separately derived system shall be installed as specified in 250.64(A) through (F). 250.64(A) – Grounding Electrode Conductor Installation in Aluminum or Copper-Clad Aluminum Conductors Change at a Glance:Ĭode language was formatted into a list format for improved clarity and usability and to clarify that terminations for aluminum or copper-clad aluminum conductors located in the interior of equipment “listed and identified for the environment” are separated from the earth and can be terminated within 450 mm (18 in.) of the earth.Ģ50.64 Grounding Electrode Conductor Installation. If the utility supply system is ungrounded, the grounding of systems permitted to be connected on the supply side of the service disconnect and are installed in one or more separate enclosures from the service equipment enclosure shall comply with the requirements of 250.24(E). If the utility supply system is grounded, the grounding of systems permitted to be connected on the supply side of the service disconnect and are installed in one or more separate enclosures from the service equipment enclosure shall comply with the requirements of 250.24(A) through (D). The grounding of systems connected on the supply side of the service disconnect, as permitted in 230.82, that are in enclosures separate from the service equipment enclosure shall comply with 250.25(A) or (B). Points user of the Code to 250.24.Ģ50.25 Grounding Systems Permitted to Be Connected on the Supply Side of the Disconnect. New section created to cover the requirements for grounding of supply-side disconnects permitted to be connected on the supply-side of a service. ![]() 250.25 – Grounding Systems Permitted to Be Connected on the Supply Side of the Disconnect Change at a Glance:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |