What is in this article?:
- 2011 National Electrical Code Changes
- 1. 110.24 Available Fault Current
- 2. 210.8 GFCI Protection
- 3. 210.12 Arc-Fault Circuit-Interrupter Protection for Dwelling Units
- 4. 210.52 Dwelling Unit Receptacle Outlet Requirements
- 5. 250.2 Bonding Jumper, Supply-Side
- 6. 250.30 Grounding Separately, Derived Systems
- 7. 250.52(A) Electrodes Permitted for Grounding
- 8. 250.53(A) Rod, Pipe, and Plate Electrodes
- 9. 250.121 Use of Equipment Grounding Conductors
- 10. 300.4 Protection Against Physical Damage
- 11. 300.5 Underground Installations
- 12. 300.11(A)(2) Nonfire-Rated Ceiling Assemblies
- 13. 300.22 Wiring in Ducts and Other Spaces for Environmental Air (Plenums)
- 14. 310.15 Conductor Ampacity
- 15. 314.28(E) Power Distribution Block in Junction Box
- 16. 404.2(C) Switches Controlling Lighting
- 17. 406.4(D) Receptacle Replacements
- 18. 406.12 Tamper-Resistant Receptacles in Dwelling Units
- 19. 406.13 Tamper-Resistant Receptacles in Guest Rooms and Guest Suites
- 20. 406.14 Tamper-Resistant Receptacles in Child Care Facilities
- 21. 450.14 Disconnecting Means
- 22. 517.16 Receptacles with Insulated Grounding Terminal
- 23. 680.26 Equipotential Bonding
- 24. 680.73 Accessibility
- 25. 690.47 Grounding Electrode System
Top 25 changes to the 2011 National Electrical Code (NEC)
5. 250.2 Bonding Jumper, Supply-Side
A new term “supply-side bonding jumper” was added.
250.2 Definitions.
Bonding Jumper, Supply-Side. A conductor on the supply side or within a service or separately derived system to ensure the electrical conductivity between metal parts required to be electrically connected. (click here to see Fig. 5)
Analysis: Equipment bonding jumpers are used often in the NEC, although the manner in which they’re sized depends on the location (in the circuit) of the bonding jumper. Generally speaking, bonding conductors located downstream of an overcurrent device are sized in accordance with 250.122, based on the rating of the overcurrent device. Bonding conductors upstream of an overcurrent device, such as the supply side of a service or between a transformer and panelboard, are typically sized using Table 250.66 and the 12½% rule discussed in 250.102(C). This Code change not only provides a new term to more accurately describe an existing conductor, but also should help clear up the sizing confusion that many people have with bonding conductors.
