Transcript Title Here - Schaedler Yesco Distribution

Presenter
Mark Nowak
North East Specification
and Project Manager
2005 NEC®
Code Changes
HOSTS
2
2005 NEC® Changes
This document was compiled through the efforts of
the Technical Liaison Department of Thomas & Betts,
and is the property of Thomas & Betts.
If you have any questions or require interpretation
assistance please contact one of the following:
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Do not duplicate any part of this publication without
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General
The phrase “Listed for the purpose” has
been removed from the NEC and replaced
with “Listed as ____”. This provides users
more guidance on the proper application of
Listed products. Annex A of the NEC
includes a list of Product Safety Standards
for reference. An example would be
products listed as “grounding and bonding
equipment” as opposed to “listed for the
purpose”.
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Article 100 Definitions
Section 100 (I) General
A new definition was added for
Grounding Electrode:
A device that establishes
an electrical connection
to the earth.
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Article 200 Use and Identification of Grounded Conductors
Section 200.6(B) Means of Identifying Grounded
Conductors - Sizes Larger than 6 AWG.
An insulated grounded conductor larger than 6 AWG
shall be identified by one of the following means:
(1) A continuous white or gray outer finish
(2) By three continuous white stripes along its entire
length on other than green insulation
(3) At the time of installation, by a distinctive white or
gray marking at its terminations. This marking shall
encircle the conductor or insulation.
See illustration on the following page.
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Article 200 Use and Identification of Grounded Conductors
Gray markings
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Article 210 Branch Circuits
GFCI Protection is now required in the following locations:
Section 210.8 (B)(4) (New) Outdoors in public spaces
Section 210.8 (B)(5) (New) HVAC convenience receptacles for
other than dwellings
Section 210.8 (C) (New) Boat Hoists
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Article 210 Branch Circuits
Section 210.52(C)(1) (New Exception) Dwelling Unit
Receptacle Outlets; Countertops; Wall Counter Spaces
A new exception and diagrams have been added to clarify
how separate wall countertop spaces are determined and to
clarify where outlets are and are not required.
See illustrations on the following pages.
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Article 210 Branch Circuits
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Article 210 Branch Circuits
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Article 210 Branch Circuits
Section 210.52(C)(2) Dwelling Unit Receptacle Outlets;
Countertop; Island Counter Spaces
New text has been added to clarify how separate countertop
spaces are determined on island countertops. “Where a range top
or sink is installed in an island counter, and the width of the counter
behind the range top or sink is less than 300 mm (12 in.), the range
top or sink is considered to divide the island into two separate
countertop spaces as defined in 210.52(C)(4).”
See the following illustration.
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Article 210 Branch Circuits
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Article 230 Services
Section 230.44 Cable Trays.
Exception
Conductors, other than
service-entrance conductors,
shall be permitted to be
installed in a cable tray with
service entrance conductors
provided a solid fixed barrier
of a material compatible with
the cable tray is installed to
separate the service entrance
conductors from the other
conductors installed in the
cable tray.
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Article 250 Grounding and Bonding
ANALYSIS OF CHANGE: The title of Article 250 has been
changed from “Grounding” to “Grounding and Bonding”. This
article has always included the rules for bonding. There are
differences in these two terms and this is an effort to emphasize
the distinct differences.
Bonded- The permanent joining of metallic parts to form an
electrically conductive path that ensures electrical continuity and
the capacity to conduct safely any current likely to be imposed.
Grounded - Connected to earth or some conducting body that
serves in place of the earth.
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Article 250 Grounding and Bonding
Section 250.8 Connection of
Grounding and Bonding Equipment
Sheet metal screws shall not be
used to connect grounding
conductors or connection devices
to enclosures.
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Article 250 Grounding and Bonding
Section 250.30 Grounding Separately Derived Alternating
Current Systems
The section was completely rewritten.
250.30 (A)(4)(c) Connections. All tap connections to the
common grounding electrode conductor shall be made at an
accessible location by one of the following methods:
1) a listed connector
2) listed connections to aluminum or copper busbars not less
than 6 mm x 50 mm (b in. x 2 in.). Where aluminum busbars
are used, the installation shall comply with 250.64(A).
3) by the exothermic welding process
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Article 250 Grounding and Bonding
Section 250.50 Grounding Electrode System
The term “if available” was replaced with “are present” to describe
the existing grounding electrodes that must be bonded together.
In addition, an exception was added for concrete encased
electrodes at existing buildings or structures. These electrodes do
not have to be bonded where the re-enforcing bars or rods are
not accessible for use without disturbing the concrete.
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.
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Article 250 Grounding and Bonding
Article 406 Receptacles, Cord Connectors and Attachment Plugs (Caps)
Section 250.126 Identification of Wiring Device Terminals FPN:
Section 406.9(B)(4) and Figure GroundingThe Grounding Symbol was changed to a fine print note.
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Article 250 Grounding and Bonding
Section 250.146(A) Connecting
Receptacle Grounding Terminal to
Box; Surface Mounted Box
At least one of the insulating
washers shall be removed from
receptacles that do not have a
contact yoke or device that
complies with 250.146(B) to ensure
metal to metal contact.
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Article 300 Wiring Methods
Section 300.4
Several changes have been made to the section
covering “Protection Against Physical Damage”.
1. Installations where cables are run parallel
to furring strips are required to utilize
cable protection.
2. Protection for cables can be supplied by
a steel plate less than 1/16 inch thick as
long as it provides equal or better protection.
3. Cables run in notches must comply with the protection
requirement.
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Article 300 Wiring Methods
Section 300.18(A) Exception (New)
Raceway Installations; Complete Runs
Add the following exception: “Short
sections of raceways used to contain
conductors or cable assemblies for
protection from physical damage shall
not be required to be installed
complete between outlet, junction, or
splicing points.”
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Article 300 Wiring Methods
Section 300.22(B) Wiring in Ducts
Plenums, and other Air-Handling
Spaces; Ducts or Plenums Used
for Environment Air
The term “Liquidtight Flexible
Metal Conduit” was removed from
the list of approved wiring
methods permitted to be used in
ducts or plenums specifically used
to transport environmental air.
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Article 300 Wiring Methods
Section 312.2(A) Damp, Wet, or
Hazardous (Classified) Locations; Damp
and Wet Locations.
The following sentence will be added to
the end of the section.
“For enclosures in wet locations,
raceways or cables entering above the
level of uninsulated live parts shall use
fittings listed for wet locations.”
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Article 314 Outlet, Device, Pull and Junction Boxes:
Conduit Bodies; Fittings; and Handhole Enclosures
Section 314.16(B)(1) Number of
Conductors in Outlet, Device, and
Junction Boxes, and Conduit
Bodies, Box Fill Calculations,
Conductor Fill.
A new second sentence was added
to the section and reads as follows:
A looped, unbroken conductor not
less than twice the minimum length
required for free conductors in
300.14 shall be counted twice.
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Article 314 Outlet, Device, Pull and Junction Boxes:
Conduit Bodies; Fittings; and Handhole Enclosures
combustible
non-combustible
Section 314.20 In Wall or Ceiling
This section was revised to add plaster rings, domed covers,
extension rings and listed extenders to the installation
requirements relative to the surface of the wall or ceiling.
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Article 314 Outlet, Device, Pull and Junction Boxes:
Conduit Bodies; Fittings; and Handhole Enclosures
Section 314.23(B)(1) Supports;
Structural Mounting; Nails and
Screws.
This change adds the following
sentence to the end of the
requirement, “Screws shall not be
permitted to pass through the box
unless exposed threads in the box
are protected using approved
means to avoid abrasion of
conductor insulation.”
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Articles 342, 344, 348, 350, 352, 356, 358, 362
Bends - How made
This change moves the table that specifies the radius of the
curve for bends to Table 2, Chapter 9.
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Articles 342(IMC), 344(RMC), 358(EMT)
Section 342.42(A)
Section 344.42(A)
Section 358.42
The reference “raintight type” was changed to “...comply with
314.15(A)”.
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Articles 342(IMC) and 344(RMC)
Section 342.30(B)(3) Securing and
Supporting; Supports
Section 344.30(B)(3) Securing and
Supporting; Supports
The phrase “firmly supported” did not
adequately secure the raceway, so the
term was changed to “securely fastened”
so the section reads, “Exposed vertical
risers from industrial machinery or fixed
equipment shall be permitted to be
supported at intervals not exceeding 6 m
(20 ft.), if the conduit is made up with
threaded couplings, the conduit is
securely fastened at the top and bottom
of the riser, and no other means of
intermediate support is readily available.
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Article 356 - Liquidtight Flexible Nonmetallic Conduit
Section 356.42 Couplings and
Connectors
The Section was revised as
follows:
“356.42 Connectors and
Couplings. Only fittings listed for
use with LFNC shall be used.
Angle connectors shall not be
used for concealed raceway
installations.”
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Articles 386, 388 Surface Raceways
Section 386.56 Splices and Taps
Section 388.56 Splices and Taps
The word “junction” was removed
from the following requirement:
“Splices and taps in surface
nonmetallic raceways without
removable covers shall be made
only in boxes.
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Articles 386, 388 Surface Raceways
Section 386.70
Combination Raceways
Section 388.70
Combination Raceways
This change revises the means for
identifying data and power
compartments in surface nonmetallic
raceway. Previously, the compartments had to be marked with
sharply contrasting colors. This change permits stamping,
imprinting or color-coding as a means of identification.
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Article 390 Underfloor Raceways
Section 390.17 Ampacity of
Conductors (New)
The following new Section was
added:
“390.17 Ampacity of Conductors.
The ampacity adjustment factors in
310.15(B)(2) shall apply to
conductors installed in underfloor
raceways.”
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Article 392 Cable Tray
Section 392.11(B)(3) Ampacity of
Cables, Rated 2000 Volts or
Less, in Cable Trays; Single-Conductor
Cables; Exception (New)
The exception was added to
392.11(B)(3) so it reads:
“(3) Where single conductors are
installed in a single layer in uncovered cable trays, with a
maintained space of not less than one cable diameter between
individual conductors, the ampacity of 1/0 AWG and larger cables
shall not exceed the allowable ampacities in Tables 310.17 and
310.19.
Exception: For solid bottom cable trays the ampacity of single
conductor cables shall be determined by 310.15(C).
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Article 406 Receptacles, Cord Connectors and Attachment
Plugs (Caps)
Section 406.8(B)(1) Receptacles in Damp or Wet Locations; Wet
Locations; 15 and 20 Ampere Receptacles.
This Section was revised by deleting “outdoor” to read as follows:
15 and 20 ampere, 125 and 250 volt receptacles installed in a wet
location shall have an enclosure that is weatherproof whether or
not the plug cap is inserted.
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Article 409 Industrial Control Panels
Entire Article is new
This article was added to the NEC to
provide guidance to AHJ’s for the
proper installation of industrial control
panels. Locating the requirements in
one article makes it easier to locate
the needed information.
®
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Article 430 - Motors, Motor Circuits, and Controllers
Section 430.102(B) Location; Motor;
Exception
This second sentence of the exception
was revised to read as follows: The
provision for locking or adding a lock to
the disconnecting means shall be
installed on or at the switch or circuit
breaker used as the disconnecting means
and shall remain in place with or without
the lock installed.
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Article 518 Assembly Occupancies
Section 518.4(C) Wiring Methods; Spaces with Finish Rating
The title of the article was changed from “Places of Assembly” to
“Assembly Occupancies”. College and university classrooms,
drinking establishments, passenger stations and terminals of air,
surface, underground, and marine public transportation facilities
have all been removed from the list of locations where electrical
nonmetallic tubing and rigid nonmetallic conduit may be used in
spaces with finish rating.
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