CHAPTER 4-05
NATIONAL ELECTRICAL CODE
Sections:
4-05-001-0001 AMENDMENTS, ADDITIONS, AND DELETIONS
4-05-001-0001 AMENDMENTS, ADDITIONS, AND DELETIONS
The following provisions shall have the effect of either amending, adding to, or deleting from the National Electrical Code adopted in Flagstaff City Code, Title 4, Building Regulations, Chapter 4-01, Administrative Enactments, Section 4-01-001-0002, Adoption.
ARTICLE 110, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS
Amend Article 110.2 by adding:
All electrical conductors, components, material and equipment shall be listed and labeled.
Amend Article 110.5 to read:
Conductors used to carry current shall be of copper only. Where the conductor material is not specified, the material and the sizes given in this Code shall apply to copper conductors. The use of aluminum wire shall be approved for feeders and service entrance conductors only and shall not be used for branch circuit wiring.
Amend Article 110.7 by adding:
All equipment rated at 1000 amperes or more shall be tested for insulation breakdown, mechanical integrity, and workmanship prior to the equipment being energized. A certified Hi-pot test shall be performed and a certificate issued to the City of Flagstaff Project Inspection Program, Development Services Section. This test shall be performed in the presence of a City of Flagstaff Building Inspector and conducted by a testing firm approved by the Building Official.
Said test shall be performed for a period of one (1) minute, the application of a 60 hertz alternating potential of 1000 volts plus twice the rated phase to phase voltage of the equipment.
This test shall be performed between all phases to ground, phase to phase, and neutral if isolated.
ARTICLE 210, CIRCUITS
Amend Article 210.5 by adding:
(D) Color Code. Where 15, 20, or 30 amp branch circuits requiring a neutral are installed in race ways or cable assemblies, the conductor of branch circuits connected to the same system shall conform to the following color code:
|
Volts |
Phase |
System |
Phase A |
Phase B |
Phase C |
Neutral |
|---|---|---|---|---|---|---|
|
120/208 |
3 |
Wye |
Black |
Red |
Blue |
White |
|
120/240 |
3 |
Delta |
Black |
Orange |
Blue |
White |
|
277/480 |
3 |
Wye |
Brown |
Orange |
Yellow |
Gray |
ARTICLE 250, GROUNDING
Amend Article 250.30 (A)(2) by adding:
(a) All new building construction shall have a one piece concrete-encased electrode and electrode conductor (Ufer), a minimum twenty (20) feet in the footing, sized from the following table:
|
0-200 Amp Service |
1 piece #4 copper (electrode and electrode conductor) |
|---|---|
|
400 Amp Service |
1 piece 1/0 copper (electrode and electrode conductor) |
|
600 Amp Service |
1 piece 2/0 copper (electrode and electrode conductor) |
|
Larger than 800 Amp Service |
1 piece 3/0 copper (electrode and electrode conductor) |
Where the Ufer has been lost, damaged, or un-located, a ground ring or modification of the same consisting of thirty (30) feet of #2 bare copper wire, buried a minimum of thirty (30) inches deep in a trench, or a Plate electrode per 250.53 (H) and per 250.56 shall be required in lieu of a concrete-encased electrode. Services larger then 200A shall be sized from the table above.
(Ord. 2007-47, Amended, 12/18/2007; Ord. 2007-48, Amended, 01/15/2008; Ord. 2009-06, Amended, 07/18/2009; Ord. 2011-12, Amended, 07/19/2011; Ord. 2013-12, Amended, 07/02/2013)