HomeMy WebLinkAboutOrdinance - 2008-O0089 - Amending Chapt 6; Adoption Of 2008 National Electrical Code - 10/23/2008First Reading
October 23~ 2008
Itea No. 5.5
ORDINANCE NO. 2008-o0089
Second Reading
November 6, 2008
Item No. 5.2
AN ORDINANCE AMENDING CHAPTER 6 OF THE CODE OF
ORDINANCES OF THE CITY OF LUBBOCK, TEXAS WITH REGARD TO
ADOPTION OF THE 2008 NATIONAL ELECTRICAL CODE AND PROVIDING
FOR CERTAIN AMENDMENTS THERETO TO MEET LOCAL CONDITIONS;
PROVIDING A PENALTY; PROVIDING A SAVINGS CLAUSE; AND PROVIDING
FOR PUBLICATION.
WHEREAS deems it in the best interest of the health, safety, and welfare of the
citizens of Lubbock to adopt the 2008 National Electrical Code (NFP A 70) for the City of
Lubbock with certain amendments thereto to meet local conditions; NOW THEREFORE:
BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF LUBBOCK:
SECTION 1. THAT Chapter Section 6-141 of the Code of Ordinances of the City of
Lubbock is hereby amended to read as follows:
Sec. 6-141. National Electrical Code adopted by reference.
The publication entitled "National Electrical Code/' 2008 Edition (NFP A No. 70)
a copy of which, authenticated by the signature of the building official, shall be
filed with the city secretary as a public record, is hereby adopted as a part of this
Code as if fully copied herein in detail, except as modified by the provisions of
Division 6 of this Article. In the event of a conflict with any provision of the
"National Electrical Code" and the Code of Ordinances, the Code of Ordinances
shall govern. References in this Code to the "National Electrical Code'' or the
"N.E.C." shall mean and refer to the 2008 Edition.
SECTION 2. THAT Chapter 6, Article V, Division 6 of the Code of Ordinances of the
City of Lubbock is hereby amended to read as follows:
DIVISION6
Sec. 6-241. Installation of wiring, fixtures and apparatus generally.
In the installation of all wiring, fixtures and apparatus falling within the scope of
this code, the technical requirements adopted by Section 6-141, as amended
herein, shall be complied with.
Sec. 6-242: Reserved
Sec. 6-243. Flash Protection.
Article 110.16 is hereby amended by deleting the entire article.
Sec. 6-244. Branch Circuits Required-Dwelling Units.
Article 210.11 (C)(l) is hereby amended to read as follows:
(C) Dwelling Units.
( 1) Small-Appliance Branch Circuits. In addition to the number of
branch circuits required by other parts of this section, three or more
20-ampere small-appliance branch circuits shall be provided for all
receptacle outlets specified by 21 0.52(8).
Sec. 6-245. Conunercial Office Space Receptacle Outlets.
Article 210 III. is hereby amended by adding Article 210.51 to read as follows:
210.51 Conunercial Office Space Receptacle Outlets. Office spaces classified as
Group ''B"-Business by the Building Code shall be provided with a minimum of
four (4) duplex convenience receptacle outlets per office, and/or shall be provided
with a duplex convenience outlet for each twelve linear feet of usable wall space,
with no point along such wall further than 6 feet from an outlet. Floor outlets
further than two feet from a wall shall not be counted towards meeting this
requirement. In no case shall more than seven (7) duplex convenience outlets be
installed on one 20 amp circuit.
Sec. 6-246. Dwelling Unit Receptacle Outlets-Small Appliances.
Article 210.52 (B)(l)-(3) is hereby amended to read as follows:
(B) Small Appliances.
(1) Receptacle Outlets Served. In the kitchen, pantry, breakfast room,
dining room, or similar area of a dwelling unit, the three or more
20-ampere small-appliance branch circuits required by
210.ll(C)(l) shall serve all wall and floor receptacle outlets
covered by 210.52(A),_all countertop outlets covered by 210.52(C),
and receptacle outlets for refrigeration equipment.
Exception No. 1: In addition to the required receptacles specified
by 210.52,_switched receptacles supplied from a general-purpose
branch circuit as defined in 210. 70(A)(l), Exception No. 1, shall
be permitted
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Exception No. 2: The receptacle outlet for refrigeration equipment
shall be permitted to be supplied from an individual branch circuit
rated 15 amperes or greater.
(2) No Other Outlets. The three or more small-appliance branch
circuits specified in 210.52(B)(l) shall have no other outlets.
Exception No. 1: A receptacle installed solely for the electrical
supply to and support of an electric clock in any of the rooms
specified in 210.52(B)(l).
Exception No. 2: Receptacles installed to provide power for
supplemental equipment and lighting on gas-fired ranges, ovens,
or counter-mounted cooking units.
(3) Kitchen Receptacle Requirements. Receptacles installed in a
kitchen to serve countertop surfaces shall be supplied by not fewer
than three small-appliance branch circuits, any or all of which
shall also be permitted to supply receptacle outlets in the same
kitchen and in other rooms specified in 210.52(B)(l). Additional
small-appliance branch circuits shall be permitted to supply
receptacle outlets in the kitchen and other rooms specified in
210.52(B)(l). No small-appliance branch circuit shall serve more
than one kitchen.
Sec. 6-247. Branch Circuit Load Calculations.
Article 220.10 is hereby amended to read as follows:
220.10 General.
Branch-circuit loads shall be calculated as shown in 220.12, 220.14, and
220.16. Additionally, in dwelling units, 20-amp lighting and receptacle loads,
other than the three required small appliance circuits specified in 210.11 (C)(l),
shall be equally divided on twenty (20)-amp branch circuits.
Sec. 6-248. Lighting Load for Specified Occupancies.
Article 220.12 is hereby amended by altering Table 220.12 to read as follows:
220.12 Lighting Load for Specified Occupancies.
A unit load of not less than that specified in Table 220.12 for occupancies
specified therein shall constitute the minimum lighting load. The floor area for
each floor shall be calculated from the outside dimensions of the building,
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Table 220.12 General Lighting Loads by Occupancy Type of Occupancy Annories and auditoriums Banks Barber shops and beauty parlors Churches Clubs Court rooms Dwelling units Garages-commercial (storage) Hospitals Hotels and motels, including apartment houses without provision for cooking by tenants-Industrial commercial (loft) buildings Lodge rooms Office buildings Restaurants Schools Stores Warehouses (storage) In any ofthe preceding occupancies except one-family dwellings and individual dwelling units of two-family and multifamily dwellings: Assembly halls and auditoriums Halls, corridors, closets, stairways Storage spaces •see 220.14(J). bSee 220.14(K). Volt-Amperes per Square Meter II 39b 33 II 22 22 6 22 22 22 17 39b 22 33 33 3 II 6 3 Volt-Amperes per Square Foot 31ft 3 2 2 4 .,2 2 2 2 IY:z 3VJ 2 3 3 y, 'h ,,,
dwelling unit, or other area involved. For dwelling units, the calculated floor area
shall not include open porches, garages, or unused or unfinished spaces not
adaptable for future use.
FPN: The unit values herein are based on minimum load conditions and 100 percent power factor
and may not provide sufficient capacity for the installation contemplated.
(INSERT TABLE 220.12)
Sec. 6-249. Receptacle Outlets
Article 220.14(1) is hereby amended to read as follows:
(I) Receptacle Outlets. Except as covered in 220.14(J) and (K), receptacle
outlets shall be calculated at not less than 180 volt-amperes for each single
or for each multiple receptacle on one yoke. A single piece of equipment
consisting of a multiple receptacle comprised of four or more receptacles
shall be calculated at not less than 90 volt-amperes per receptacle. This
provision shall not be applicable to the receptacle outlets specified in
210.ll(C)(l) and (C)(2). In no case shall more than seven (7) duplex
receptacles be installed on a single 20-amp circuit in commercial
occupanc1es.
Sec. 6-250. Non-residential buildings with multiple services served by
underground service laterals.
Article 230.2 is hereby amended by adding a new subsection (F), as follows:
(F) Non-residential buildings with multiple services served by underground
service laterals. For every non-residential building where multiple services
are authorized and are supplied by underground service laterals, there shall
be a designated metering/service location at the rear of such building on
the exterior wall. There shall be no point along this wall more than
seventy-five (75) linear feet from a metering/service location. No utility
service point shall be closer than one hundred fifty (150) feet from another
utility service point unless otherwise approved. The arrangement and
installation of the conductors and equipment shall be as provided for in
Figure 230.96 and Article 230.96.
Sec. 6-251. Point of attachment.
Article 230.26 is hereby amended to read as follows:
230.26 Point of Attachment.
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(A) The point of attaclunent of the service-drop conductors to a building or
other structure shall provide the minimmn clearances as specified in 230.9
and 230.24. In no case shall this point of attaclunent be less than 3.0 m (10
ft) above finished grade.
(B) The point of attaclunent of overhead service drops on a residence or
building shall be on the rear of the building (alley side), or at a point
agreed upon by the inspector and the serving utility.
Sec. 6-252. Service Masts as Supports.
Article 230.28 is hereby amended to read as follows:
230.28 Service Masts as Supports.
Where a service mast is used for the support of service-drop conductors, it shall
be of adequate strength or be supported by braces or guys to withstand safely the
strain imposed by the service drop. Where raceway-type service masts are used,
masts shall consist of rigid metallic conduit (RMC) or intermediate metallic
conduit (IMC) not less than two (2)-inch trade size, and all raceway fittings shall
be identified for use with service masts. Only power service-drop conductors shall
be permitted to be attached to a service mast. The point of attachment of the
service cable shall be twenty-four (24) inches above the roof.
Sec. 6-253. Non-residential buildings with multiple services served by
underground service laterals.
Article 230.40, Exception No. 1, is hereby amended to read as follows:
Exception No. 1: A building with more than one occupancy shall be
permitted to have one set of service-entrance conductors for each service, as
defined in 230.2, run to each occupancy or group of occupancies. For non-
residential buildings containing multiple occupancies served by underground
service laterals in accordance with Article 230.2(F), installation shall be in
accordance with Figure 230.96 and Article 230.96.
Sec. 6-254. Service Equipment-General.
Article 230V is hereby amended by adding a new Section 230.67 to read as
follows:
230.67 Meter Installation.
(A) Each meter socket installation shall be on the outside of the building
residence or other structure and shall be mounted not more than six (6)
feet nor less than five (5) feet above the level of the standing space
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measured to the center of the meter face, except when the device or area
for mounting the meter base is provided by the serving utility.
(B) Multi-meter bases of two (2) or more meters at any one location shall have
a permanent identification tag (brass, copper or aluminum). Such tag shall
be not less than one inch long, one-half inch wide or one inch in diameter.
Each tag shall properly identify the unit served by the meter base and be
clearly visible. It shall be securely fastened to the meter base, but not the
meter base lid. Tags shall be stamped with steel numerical and/or
alphabetical figures of at least one-eighth of an inch.
Exception: If visible from the front, non-movable parts of meter base may
be stamped for identification.
Sec. 6-255. Non-residential buildings with multiple services served by
underground service laterals.
Article 230 is hereby amended by adding a new Article 230.96 to read as follows:
Article 230.96. Non-residential buildings with multiple services served by
underground service laterals.
Non-residential buildings with multiple services served by underground service
laterals shall have all services configured in accordance with 230.96 (1) through
(7) and Figure 230.96 below, unless otherwise approved.
(1) Sizing of gutter, wire-way or wire trough. The contractor shall provide a
gutter, wire-way or wire-trough with a minimum size of eight (8) inch by
eight (8) inch by six (6) feet or the National Electrical Code requirement,
whichever is greater, to contain the service conductors to supply the meter
bases and service disconnects at each metering location.
(2) Service disconnecting means. Each space requiring its own meter shall
have its service disconnect and disconnects located at the metering
location and there shall be no more than six (6) service disconnecting
means at any metering location without the written consent of the building
official.
(3) Conductors and raceways. The contractor shall provide service conductors
and raceways from the gutter, wire-way or wire-trough to the point of
connection of the serving utility. There shall be one additional four-inch
conduit provided from each wire-trough to the point of connection of the
serving utility or a terminal junction box adjacent to the metering location.
The contractor shall provide an acceptable means for at least six_(6) meter
taps from the service feed brought to each wire-trough. To insure a proper
conductor termination, the service feed conductors from the point of
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colUlection of the serving utility to the wire-trough shall be copper. They
shall be installed in approved conduit, shall enter the wire-trough from the
bottom side toward one end, shall traverse the entire length of the wire-
way and shall be terminated on an approved termination lug or block as
set forth above.
(4) Sizing of service entrance conductors and equipment. If the actual load of
the building is not known, an assumed load of twenty (20) volt-amperes
per square foot shall be used to size the service conductors.
(5) Phase-matching and balancing of load. All service taps which connect to
the building service shall match the phasing of the building service.
Service taps connecting to a 3-phase 4-wire building service shall be 3-
phase and 4-wire taps. Service taps shall be load balanced before a final
inspection is granted and the system shall be balanced back to the building
service.
(6) Method of grounding services. Multi-meter services shall be grounded at
the service connection point in the wire way and all service taps shall be
grounded to that point. The grounding conductor shall be sized according
to the requirements of Article 250 for the service size. Refer to the
following illustration:
~---------------6·----------------~
MAIN
O&SC
MAIN
OtS.C
MASH
OISC
Figure
230.96
7
MAtH
oasc
MAIN
oasc
Sec. 6-256. Grounding Electrode System.
Article 250.50 is hereby amended to read as follows:
250.50 Grounding Electrode System.
All grounding electrodes as described in 250.52(A}(l} through (A)(7) that are
present at each building or structure served shall be bonded together to form the
grounding electrode system. Where none of these grounding electrodes exist, one
or more of the grounding electrodes specified in 250.52 (A)(4) through (A)(8)
shall be installed and used. In new construction, or in any building reconstruction
or addition involving the new construction of a concrete foundation containing
reinforcing steel that complies with the requirements of Article 250.52(A)(3), a
concrete encased electrode shall be provided as part of the grounding electrode
system. Where a concrete encased electrode or metallic water piping is used, a
supplemental electrode complying with 250.52 (A)(5) shall be provided.
Exception: Concrete-encased electrodes of existing buildings or structures shall
not be required to be part of the grounding electrode system where the steel
reinforcing bars or rods are not accessible for use without disturbing the
concrete.
Sec. 6-257. Bonding for Other Systems.
Article 250.94 shall is hereby amended by deleting the entire article.
Sec. 6-258. Cables and Raceways Parallel to Framing Members and Furring
Strips.
Article 300.4 (D) is hereby amended by deleting the entire subsection.
Sec. 6-259. Underground Installations (Direct Buried Conductors and Cables)
Article 300.5 and Table 300.5 are hereby amended to read as follows:
300.5 Underground Installations.
(A) Minimum Cover Requirements. Direct-buried cable or conduit or other
raceways shall be installed to meet the .rninimwn cover requirements of
Table 300.5.
(Insert Table 300.5)
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Table 300.5 Minimum Cover Requirements, 0 to 600 Volts, Nominal, Burial in Millimeters (Inches) Type or Wiring Method or Clr~ult ColumnJ Column4 Column 5 Nonmetallk Raceways Residential Branch Cir~uits Cln:ults for Control of Irrigation Columnl Listed for Direct Burial Rated 120 Volts or Less with and Landscape Lighting Limited to Column J Rigid Metal Conduit Without Concrete GFCI Protection and Maximum Not MoTe Than 30 Volts and Direct Burial Cables or oT Intermediate Enc:asement or Other Overcurrent Protection of 20 Installed with Type UF or in Other Conductors, Metal Conduit Appreved Raceways Ampues Identified Cable or Raceway Location of Wiring Method or Circuit mm ln. mm in. mm ln. mm ln. mm in. All locations not specified below 600 24 ISO 6 4SO 18 300 12 150 6 In trench below S0-11Ul1 (2-in.) thick concrete or equivalent 450 18 ISO 6 300 12 ISO 6 ISO 6 Under a building 0 0 0 0 0 0 0 0 0 0 (in raceway only} (in raceway only) (in raceway only) Under minimum of 102-mm (4-in.) thick concrete exterior slab 450 18 100 4 100 4 150 6 150 6 with no vehicular tmffic and the slab extending not less tMn 152 nun (6 in.) beyond the underground installation (direct burial) (direct burial) 100 4 100 4 (in raceway) (in raceway) Under streets, highways, roads, alleys, driveways, and parking 600 24 600 24 600 24 600 24 600 24 lots One-and two-family dwelling driveways and outdoor parking 450 18 450 18 450 \8 300 12 450 18 are<~s, and used only for dwell!ng-related purposes In or under airport runways, including adjacent areas where 450 18 450 18 450 18 450 18 450 18 trespassing prohibited Notes: I. Cover is defined as lhe shortest distance in millimeters (inches) measured between a point on the top surface of any direct-buried conductor, cable, conduit, or other raceway and the top surface of finished grade, concrete, or similar cover. 2. Raceways approved for burial only where concrete encased sMII require concrete envelope not less than 50 mm (2 in.) thick. 3. Lesser depths shall be permitted where cables and conductors rise for terminations or splices or where access is otherwise required. 4. Where one of the wiring method types listed in Columns 1-3 is used for one of the circuit types in Columns 4 and 5, the shallowest depth of burial shall be permitted. S. Where solid rock prevents compliance with the cover depths specified in this table, the wiring shall be installed in metal or nonmetallic raceway permitted for direct burial. The raceways shall be covered by a minimum of SO mm (2 in.) of concrete extending down to rock. 6. Service and feeder conductors shall be installed in approved raceways protected in accordance with Column 2 or 3, as applicable.
Sec. 6-260. Conductor Material.
Article 310.2(B) is hereby amended to read as follows:
(B) Conductor Material. Conductors in this article shall be of aluminum,
copper-clad ahuninurn, or copper unless otherwise specified.
Exceptions:
(1) Conductors made of aluminum or of an AA-8000 Series aluminum
alloy complying with Article 310.4 may be installed on services
and feeders only. Aluminum conductors must be terminated
properly using approved compression-type crimp lugs installed
with a proper tool and with an approved oxide inhibitor. Such
conductors may also be used as branch circuit wiring in
commercial and industrial applications in No. 4 AWG or larger
wire sizes, subject to the further conditions outlined herein.
(2) No aluminum conductors shall be installed on any branch circuits
or grounding systems.
Sec. 6-261. Minimum Size of Conductors.
Article 310.5 is hereby amended to read as follows:
310.5 Minimum Size of Conductors.
The minimum size of conductors shall be as shown in Table 310.5, except that no
conductor smaller than No. 12 American wire gauge size (12 AWG) shall be used
in work governed by this code.
Exceptions:
(1) Pendant and portable cords;
(2) Fixture wire;
(3) No. 14 AWG may be used for individual fixture leads at an outlet box;
(4) No. 14 AWG may be used for control circuits operating contactors or
relays of a size approved by the manufacturer and the building inspection
department;
(5) Wiring for systems covered under Article 700 (Emergency Systems);
(6) Wiring for systems covered under Article 600 (Electrical Signs);
(7) No. 14 A WG may be used for the wiring of switch legs in residential
occupancies. where provided with appropriate over current device.
(8) Notwithstanding exceptions (1)-(7) above, where permitted elsewhere in
this code.
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Sec. 6-262. Uses not Permitted (Types NM and NMS).
Article 334.12(8) shall be amended to read as follows:
(B) Types NM and NMS. Types NM and NMS cables shall not be used under
the following conditions or in the following locations:
(1) Where exposed to corrosive fumes or vapors
(2) Where embedded in masonry, concrete, adobe, fill, or plaster
(3) In a shallow chase in masonry, concrete, or adobe and covered with
plaster, adobe, or similar finish
( 4) Where exposed or subject to excessive moisture or dampness.
Sec. 6-263. Nonmetallic sheathed cable (Romex)--Uses not pennitted.
Article 334.12 shall be amended by adding a new subsection (C) to read as
follows:
(C) Nonmetallic sheathed cable shall not be used in any type of commercial
building nor shall it be used in residential buildings used as or converted
into any commercial use nor in any building used as, or converted into,
convalescent homes, nurseries or day-care facilities requiring a license
from the State of Texas. For purposes of this Article, a "commercial
building" shall include all buildings not classified as Group "R"-
Residential by the Building Code.
Sec. 6-264. Ampacity.
Article 334.80 shall be amended by deleting the second and third paragraphs.
Sec. 6-265. Wet Locations (receptacles in).
Article 406.8 (B) (1) shall be amended to read as follows:
15-and 20-ampere, 125-and 250-volt receptacles in a Wet location. 15-and 20-
ampere, 125-and 250-volt receptacles installed outdoors in a wet location shall
have an enclosure that is weatherproof whether or not the attachment plug cap is
inserted. All 15-and 20-ampere, 125-and 250 volt non-locking receptacles shall
be listed weather-resistant type.
Exception: 15-and 20-ampere, 125-through 250-volt receptacles installed in the
following wet locations shall be permitted to have an enclosure that is
weatherproof only when the attachment plug is removed:
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a. Those subject to routine high pressure spray washing;
b. Those customarily designed and located for intermittent, short-
term use during periods where rainfall or other detrimental
moisture is not present.
Sec. 6-266. Panel Board Over current Device Capacity
Article 408 Ill. Is hereby amended by adding Article 408.35 to read as follows:
408.35. Panelboard Spare Circuit Capacity.
Panelboards sezving dwelling units shall be provided with capacity for two
additional 120-volt branch circuits, and shall be provided with a spare conduit of
not less than %" trade size installed from the panel to an accessible crawl space in
the attic, under the floor, or to the outside of the house where there is no
accessible attic or crawl space.
Sec. 6-267. Luminaries in Specific Locations
Article 410.10 is hereby amended by adding a new subartic/e (F), to read as
follows:
(F) Flood Lights and other Luminaries on or near the Ground. Open flood
lights or other fixtures containing luminaries installed on the ground or
within eight (8) feet of finished grade shall be equipped with a guard or
protective device to prevent personal injury from burns or electric shock.
Sec. 6-268-276 Reserved.
SECTION 3. THAT violation of any provision of this ordinance shall be deemed a
misdemeanor punishable as provided by Section 1-4 of the Code of Ordinances of the
City of Lubbock, Texas.
SECTION 4. THAT should any paragraph, sentence, clause, phrase or word of this
Ordinance be declared unconstitutional or invalid for any reason, the remainder of this
Ordinance shall not be affected thereby.
SECTION 5. THAT THAT the City Secretary of the City of Lubbock, Texas, is hereby
uthorized and directed to cause publication of the descriptive caption of this Ordinance
an alternative means of publication provided by law.
AND IT IS SO ORDERED.
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Passed by the City Council on first reading this 2Jnl day of October 2008.
Passed by the City Council on second reading this 6th day of November • 2008.
ATTEST:
g~.K R~ a Garza, City SecreW)f
NEC20080rd
10.13.08
TOM MARTIN, MAYOR
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IN FILE