01-0037 - Laserfiche WebLink

Browse Search

. . 250-92. Services (a) Bonding of Services. The noncurrent-carrying metal parts of equipment indicated in (1), (2), and (3) shall be effectively bonded together. 1. The service raceways, cable trays, cablebus framework, or service cable armor or sheath except as permitted in Section 250-84. 2. All service enclosures containing service conductors, including meter fittings, boxes, or the like, interposed in the service raceway or armor. 3. Any metallic raceway or armor enclosing a grounding electrode conductor as specified in Section 250-64(b). Bonding shall apply at each end and to all intervening raceways, boxes, and enclosures between the service equipment and the grounding electrode. .'f;;"~~l (b) Bonding to Other Systems. An accessible means external to enclosures for connecting intersystem bonding and grounding conductors shall be provided at the service by at least one of the following means: 1. Exposed nonflexible metallic service raceways 2. Exposed grounding electrode conductor 3. Approved means for the external connection of a copper or other corrosion-resistant bonding or grounding conductor to the service raceway or equipment For the purposes of providing an accessible means for intersystem bonding, the disconnecting means at a separate building or structure as permitted in Section 250-32 and the disconnecting means at a mobile home as permitted in Section 550-23(a) shall be considered the service equipment. ijc~_a7pJ FPN No.1: A No.6 copper conductor with one end bonded to the service raceway or equipment and with 6 in. (152 mm) or more of the other end made accessible on the outside wall is an example of the approved means covered in (b)(3). 7C~t~;,1 FPN No.2: See Sections 800-40, 810-21, and 820-40 for bonding and grounding requirements for communications circuits, radio and television equipment, and CATV circuits. I~=etit~]i . . 250-94. Method of Bonding at the Service Electrical continuity at service equipment, service raceways, and service conductor enclosures shall be ensured I by one of the following methods: 1 Bonding equipment to the grounded service conductor in a manner provided in Section 250-8 .,F'~'"'="'''''.''......_...ij).. . 'iC__ta'l!'iJi 2. Connections utilizing threaded couplings or threaded bosses on enclosures where made up Wfenchtight 3. Threadless couplings and connectors where made up tight for metal raceways and metal-clad cables 4. Other approved devices, such as bonding-type locknuts and bushingsr~t;;-;t Bonding jumpers meeting the other requirements of this article shall be used around concentric or eccentric knockouts that are punched or otherwise formed so as to impair the electrical connection to ground. Standard 10cknuts or bushings shall not be the sole means for the bonding required by this section. . . 250-96. Bonding Other Enclosures