NEC or Other Number Item Reference Comments Does the grounding electrode system and Article 250 335 characteristics match the engineered drawings? Are all four components of the grounding and Article 250 336 bonding scheme present at each separately derived system? Are the minimum size grounding electrode Article 250 337 conductor(s) and bonding jumper(s) installed? Is the separately derived system a grounded Article 250 338 system or an ungrounded system? What types of separately derived systems are Article 250 339 installed? If generators are installed, what type of transfer Article 250 340 equipment is used? 341 Is the size of the grounded conductor adequate? Article 250 Is the system bonding jumper connected at the Article 250 342 source enclosure or first system over current device enclosure? Are the metal enclosures and raceway containing Article 250 343 derived phase conductors bonded properly? Separately Derived System Grounding and Bonding Verify grounding requirements or specifications of rule or regulation 344 any engineered drawings. Verify the size of the system based on the plans Based on blueprints or 345 or by the equipment labels. load served, 220.10 Determine all available grounding electrodes 250.50, 250.52(A) 346 based on the construction and plans. Determine which electrode(s) required to be used 250.30(A)(7) 347 (as near as practicable and in the same area. Verify grounding electrode conductor(s) are 250.66, 348 properly sized. 250.30(A)(3) Verify that system bonding jumper is connected 250.30(A)(1), 349 and sized properly. 250.28, 250.66 Check that grounding electrode conductor(s) is 250.64(C) 350 installed without a splice. Verify grounding electrode conductor is securely 250.64(B) 351 fastened and protected from physical damage. Verify Metal enclosures or raceways for 250.64(E) grounding electrode conductors are bonded to the grounding 352 electrode conductor at both ends of the enclosure or raceway. Verify any installed equipment bonding jumpers 250.30(A)(2), between source enclosure and first system over 250.35, 250.66, 353 current 250.102(C) and (D) device enclosure sized properly. Verify accessibility of grounding electrode 250.68(A) 354 conductor connections.
Number Item NEC or Other Reference Comments 335 Does the grounding electrode system and characteristics match the engineered drawings? Article 250 336 Are all four components of the grounding and bonding scheme present at each separately derived system? Article 250 337 Are the minimum size grounding electrode conductor(s) and bonding jumper(s) installed? Article 250 338 Is the separately derived system a grounded system or an ungrounded system? Article 250 339 What types of separately derived systems are installed? Article 250 340 If generators are installed, what type of transfer equipment is used? Article 250 341 Is the size of the grounded conductor adequate? Article 250 342 Is the system bonding jumper connected at the source enclosure or first system over current device enclosure? Article 250 343 Are the metal enclosures and raceway containing derived phase conductors bonded properly? Article 250 Separately Derived System Grounding and Bonding 344 Verify grounding requirements or specifications of any engineered drawings. rule or regulation 345 Verify the size of the system based on the plans or by the equipment labels. Based on blueprints or load served, 220.10 346 Determine all available grounding electrodes based on the construction and plans. 250.50, 250.52(A) 347 Determine which electrode(s) required to be used (as near as practicable and in the same area. 250.30(A)(7) 348 Verify grounding electrode conductor(s) are properly sized. 250.66, 250.30(A)(3) 349 Verify that system bonding jumper is connected and sized properly. 250.30(A)(1), 250.28, 250.66 350 Check that grounding electrode conductor(s) is installed without a splice. 250.64(C) 351 Verify grounding electrode conductor is securely fastened and protected from physical damage. 250.64(B) 352 Verify Metal enclosures or raceways for grounding electrode conductors are bonded to the grounding electrode conductor at both ends of the enclosure or raceway. 250.64(E) 353 Verify any installed equipment bonding jumpers between source enclosure and first system over current device enclosure sized properly. 250.30(A)(2), 250.35, 250.66, 250.102(C) and (D) 354 Verify accessibility of grounding electrode conductor connections. 250.68(A)
ElecSafe_AppB3.docx