90.2(B)(5). Delete
(d) and revise (c) to read as follows:
(c) Are
located in legally established easements, rights-of-way, or by other agreements
either designated by or recognized by the public service commissions, utility
commissions, or other regulatory agencies having jurisdiction for such
installations.
Informational Note: Wiring systems that
are maintained by utilities and that operate under this exclusion from coverage
by the Massachusetts Electrical Code include, regardless of ownership,
luminaires for street and area lighting directly connected to such
systems.
90.4.
Revise the first paragraph to read as follows:
90.4
Enforcement.
This Code shall be used by the authority enforcing the Code and exercising
legal jurisdiction over electrical installations. The authority having
jurisdiction of enforcement of the Code shall accept listed and labeled
equipment or materials where used or installed in accordance with instructions
included with the listing and labeling. The authority shall have the
responsibility for deciding upon the approval of unlisted or unlabeled
equipment and materials, and for granting the special permission contemplated
in a number of the rules.
90.6.
Revise to read as follows:
90.6
Interpretations and Appeals. To promote uniformity of
interpretation and application of the provisions of this Code, interpretations
may be requested from the Board of Fire Prevention Regulations. Requests for
interpretation shall be in the form of a question that can receive a "Yes" or
"No" answer. This in no way supersedes the right of any individual who is
aggrieved by the decision of an Inspector of Wires to appeal from that decision
to the Board of Electricians' Appeals in accordance with M.G.L. c. 143, §
3P. The Board of Fire Prevention Regulations shall, upon the request of the
Board of Electricians' Appeals, render interpretations to the Board of
Electricians' Appeals.
It is customary to revise this Code periodically to conform with
developments in the art and the result of experience, and the current edition
of the Code shall always be used.
90.10. Add new section numbered 90.10 to
read:
90.10.
References to Commonwealth of Massachusetts Codes, Regulations, and
Laws. References are included in Appendix A for Building Codes,
Elevator Regulations, Plumbing and Fuel Gas Code, Board of Fire Prevention
Regulations, Division of Industrial Safety, State Sanitary Code, Fire Safety
Code, Permit Applications, and Chapters of the General Laws.
See Appendix A.
Article 100. Coordination, Selective
(Selective Coordination). Revise this definition to read as follows:
Localization of an overcurrent condition to restrict outages to
the circuit or equipment affected for fault current events that extend beyond
0.1 second, and accomplished by the selection and installation of overcurrent
protective devices and their ratings or settings for the range of available
overcurrents under such conditions, whether originating from overload,
ground-fault, or short circuit, and for the full range of overcurrent
protective device opening times applicable to such events.
110.13(B). Revise the second paragraph to
read as follows:
Electrical equipment provided with ventilating openings shall be
installed so that walls, ceilings or other obstructions do not prevent free air
circulation of air through the equipment.
110.14(A). Delete the last sentence of the
first paragraph and insert the following two sentences in its place:
Connection by means of wire binding screws or studs and nuts
having upturned lugs or equivalent shall be permitted for 10 AWG or smaller
solid conductors. Where stranded conductors are terminated on and not looped
through such terminals, the terminals shall be identified for such use, or the
strands at the terminals shall be made solid.
110.16(B). Delete this subsection.
110.24. Insert an additional informational
note as follows:
Informational Note No. 3. The marking
required in this section is useful in determining compliance with 110.9, but
must be understood as transitory and requiring reconfirmation prior to the
performance of additional electrical work. This and numerous other locations in
the NEC require field markings of the available fault current. A major
component of this current is usually that contributed by the utility through
the service. The utility contribution is inherently dynamic in value,
particularly on the medium voltage portions of their distributions. Without
notice, automatic line sectionalizing can transfer a service from the tail end
of one circuit to the head end of an adjacent circuit, with a significant
increase in available fault current. In addition, there are numerous sources of
on-site contributions to available fault current.
110.26(A)(1). Add a fourth paragraph (d) as
follows:
(d)
Adequate
Accessibility. By special permission, smaller spaces may be
permitted where it is judged that the particular arrangement of the
installation will provide adequate accessibility.
110.26(A)(4)(4). Revise to read as follows:
The space in front of the enclosure shall comply with the depth
requirements of Table 110.26(A)(1), and shall be unobstructed to the floor by
fixed cabinets, walls, or partitions. Space reductions in accordance with
110.26(A)(1)(b) shall be permitted. The maximum height of the working space
shall be the height necessary to install the equipment in the limited space. A
horizontal ceiling structural member or access panel shall be permitted in this
space provided the location of weight-bearing structural members does not
result in a side reach of more than 150 mm (6 in.) to work within the
enclosure.
210.8. Revise the second paragraph to read as
follows:
For the purposes of this section, when determining distance from
receptacles the distance shall be measured as the shortest path the supply cord
of equipment connected to the receptacle would follow without piercing a floor,
wall, ceiling, fixed barrier, or without passing through a cabinet door
opening, doorway, or window.
210.8(A)(7). Revise to read as follows:
(7)
Sinks - where
receptacles are installed within 1.8 m (6 ft.) from the top inside edge of the
bowl of the sink, or where located within a cabinet supporting a sink.
210.8(B)(5). Revise to
read as follows:
(5)
Sinks - where receptacles are installed within 1.8 m
(6 ft.) from the top inside edge of the bowl of the sink, or where located
within a cabinet supporting a sink.
210.8(F). Delete this requirement.
210.12(A). Revise the
parent text to read as follows:
All 120-volt, single-phase, 15- and 20-ampere branch circuits
supplying outlets or devices installed in dwelling units shall be protected by
any of the means described in 210.12(A)(1) through (A)(6).
210.21(B). Insert a new fifth paragraph as
follows:
(5)
Receptacles on
Individual Branch Circuits. A receptacle outlet installed to
comply with a requirement for an individual branch circuit shall contain a
single receptacle, or a multiple receptacle if, and then only to the extent
that, the supplied equipment includes multiple supply cord connections.
210.25(B). Add an
exception as follows:
Exception: Branch circuits supplying
lighting outlets in common areas on the same floor as a dwelling unit in a new
or existing two-family or an existing three-family building shall be permitted
to be supplied from equipment that supplies one or more of those dwelling
units.
210.52(A)(2)(1).
Revise to read as follows:
Any space 600 mm (2 ft.) or more in width (including space
measured around corners) and unbroken along the floor line by doorways,
fireplaces, and similar openings.
210.52(A)(4). Delete 210.52(A)(4) in its
entirety.
210.52(C). Make the
following three revisions:
I. In the parent
language, delete the clause "and shall not be considered as the receptacle
outlets required by 210.52(A)."
II.
In 210.52(C)(2), revise (b) by adding the following sentence at the end:
"A receptacle in a wall countertop or work surface that directly
faces a peninsular countertop or work surface shall be permitted to serve as
the receptacle for the peninsular space where the spaces are contiguous and the
receptacle is located within 1.8 m (6 ft.) of its most distant
edge."
III. At the end of
210.52(C)(2) insert an exception as follows:
Exception: Any portion of an island or
peninsular countertop or work surface that permanently allows for seating and
extends 300 mm (1 ft.) or more from its supporting cabinet or other structure
shall not be required to be served by receptacle outlets, and shall be excluded
from the area calculation in (a). The portion excluded shall be 750 mm (30 in.)
in depth as measured perpendicular to the countertop edge. Where the entire
surface of an island countertop or work surface permanently allows for seating
there shall be at least one receptacle outlet installed at a location
determined by the installer, designer, or building owner in accordance with
210.52(C)(3).
210.52(C)(3). Revise to read as follows:
(3)
Peninsular Countertop
Spaces. At least one receptacle outlet shall be installed at each
peninsular countertop long dimension space with a long dimension of 600 mm (24
in.) or greater and a short dimension of 300 mm (12 in.) or greater. A
receptacle in a wall countertop space that directly faces a peninsular
countertop shall be permitted to serve as the receptacle for the peninsular
space where the spaces are contiguous and the receptacle is located within 1.8
m (6 ft) of its most distant edge.
220.12. Revise the second exception to read
as follows:
Exception No. 2: Where a building is
designed and constructed to comply with an energy code adopted by the local
authority and specifying an overall lighting density of less than 13.5
volt-amperes/m2 (1.2
volt-amperes/ft2), the unit lighting loads in Table
220.12 for office and bank areas within the building shall be permitted to be
reduced by 11 volt-amperes/m2 (1
volt-amperes/ft2).
225.30(E). Revise to read as follows:
(E)
Documented Switching
Procedures. Additional feeders or branch circuits shall be
permitted to supply large capacity multibuilding industrial or institutional
installations under single management where documented safe switching
procedures are established and maintained for
disconnection.
225.30(F).
Revise to read as follows:
(F)
Documented Switching Procedures. Additional feeders or
branch circuits shall be permitted to supply large capacity multibuilding
industrial or institutional installations under single management where
documented safe switching procedures are established and maintained for
disconnection.
225.32
Exception No. 1. Revise to read as follows:
Exception No. 1: For large capacity
multibuilding industrial or institutional installations under single management
where documented safe switching procedures are established and maintained for
disconnection, and where the disconnection is monitored by qualified
individuals, the disconnecting means shall be permitted to be located elsewhere
on the premises.
230.85.
Revise to add the following exceptions:
Exception to (1), (2), and (3): A
building requiring an emergency disconnect(s) supplied by a service lateral or
by underground service conductors which terminate inside the building shall be
permitted to be capable of disconnection from a readily accessible location
outside of the dwelling by using a method providing remote control of the
service disconnecting means, and marked: REMOTE EMERGENCY ELECTRICAL DISCONNECT
and NOT SERVICE EQUIPMENT.
Markings shall comply with 110.21(B). This section shall only
apply to the following:
(1) New one-
and two-family dwellings, or new buildings of double occupancy, at least one of
which is a dwelling unit.
(2)
Two-family dwellings or buildings of double occupancy at least one of which is
a dwelling unit, and newly created by subdivision of an existing one-family
dwelling.
(3) One- and two-family
dwellings where the service equipment in either or both dwelling units is
entirely replaced.
(4) One- and
two-family dwellings where the service equipment in either or both dwelling
units is being increased in capacity in terms of its rating in amperes.
240.24(A). Revise the
exception to read as follows:
Exception: The use of a tool shall be
permitted to access overcurrent devices located within listed industrial
control panels, or within enclosures designed for hazardous (classified)
locations or adverse environmental conditions. An enclosure within the scope of
this exception, and all overcurrent device(s) within such enclosures as judged
with the enclosure open, shall comply with the accessibility provisions of
240.24(A).
250.130(C).
Delete this subsection.
300.4(D).
Delete this subsection.
300.5(A). Add an
informational note to this subsection as follows:
Informational Note: Cables suitable for
direct burial are often sleeved in various raceways for design reasons. If such
cable is installed with sufficient cover for direct burial, then the
characteristics of that raceway need not be evaluated. Other rules of this Code
that apply to raceways generally may apply. See
300.5(H).
300.5(D). Revise to read as follows:
(D)
Protection from
Damage. Direct-buried conductors and cables shall be protected
from damage in accordance with 300.5(D)(1) through 300.5(D)(4). Buried raceways
enclosing service conductors shall additionally meet the requirement in
300.5(D)(3).
300.11(B).
Revise this subsection as follows:
I. Delete
the second sentence in 300.11(B) which reads: "Support wires and associated
fittings that provide secure support and that are installed in addition to the
ceiling grid support wires shall be permitted as the sole support."
II. Revise 300.11(B)(2) to read as follows:
(2)
Nonfire-rated
Assemblies. Branch-circuit wiring associated with equipment that
is located within, supported by, or secured to a suspended ceiling that is not
an integral portion of a fire-rated floor/ceiling or roof/ceiling assembly
shall be permitted to be supported by the ceiling support wires.
III. Delete 300.11(B)(2)
Exception.
300.17. Add a
second paragraph as follows:
Where different raceway wiring methods are joined together
without a pull point at the transition, there shall not be more than the
equivalent of four quarter bends (360 E total) between pull points,
e.g., conduit bodies and boxes.
300.50. In Note 3 to Table 300.50, insert the
words "or institutional" after the word "industrial".
310.12. Delete the second paragraph.
310.15(B)(2). Change the strut
thickness dimension in the second paragraph from "23 mm ( f in.)" to "19 mm
(¾ in.)".
310.15(C)(1).
Delete the fourth itemized adjustment provision (d) covering AC and MC
cable.
310.15(C)(1). Revise Table
310.15(C)(1) to read as follows:
|
Number of Conductors1
|
Percent of Values in Tables 310.16 through 310.19, as
Adjusted for Ambient Temperature if Necessary
|
|
4 through 6
|
80
|
|
7 through 24
|
70
|
|
25 through 42
|
60
|
|
43 and above
|
50
|
1 Number of Conductors is the total
number of conductors in the raceway or cable, including spare conductors. The
count shall be adjusted in accordance with 310.15(E) and (F), and shall not
include conductors that are connected to electrical components, but that cannot
be simultaneously energized.
Informational Note: Overheating may
occur where continuous, fully loaded conductor diversity is less than 50% and
the number of current-carrying conductors exceeds nine. See
310.15(C).
320.80(A). Delete
the last sentence of the first paragraph, which reads: "The 90°C
(194°F) rating shall be permitted to be used for ampacity adjustment and
correction calculations; however, the ampacity shall not exceed that for a
60°C (140°F) rated conductor."
334.10. Insert an exception to follow (3) to
read as follows:
Exception to (2) and (3): For buildings
or structures required to be of Type I or Type II construction, Type NM, or
Type NMC cables shall be permitted to be used, provided that where so applied
in buildings or structures exceeding three stories above grade, circuits run in
Type NM or NMC cable shall not leave the floor or dwelling unit from which the
circuits originate. Cables shall be installed within walls, floors, or ceilings
that provide a thermal barrier of material that has at least a 15-minute finish
rating as identified in listings of fire-rated assemblies.
334.12(A)(2) Revise to read as follows:
(2) In dropped or suspended ceilings in other
than one- and two-family and multifamily dwellings, unless run so as to closely
follow the surface of framing members, running boards, or the equivalent, or
unless connected to luminaires or other pieces of electrical equipment in
accordance with 334.30(B)(2).
334.17 Revise to read as follows:
334.17
Through or Parallel to
Framing Members and Furring Strips. Types NM and NMC cable shall
comply with 300.4 where installed through studs, joists, rafters, and similar
members. Grommets or bushings shall be used in metal studs as required in
300.4(B)(1), shall remain in place during the wall finishing process, shall
cover the complete opening, and shall be listed for the purpose of cable
protection.
In both exposed and concealed locations, where the cable is
installed parallel to framing members, such as joists, rafters, or studs, or is
installed parallel to furring strips, the cable shall be secured so that the
nearest outside surface of the cable is not less than 19 mm (¾ in.) from
the nearest edge of the framing member or furring strip where nails or screws
are likely to penetrate. Where this distance cannot be maintained, the cable
shall be protected from penetration by nails or screws by a steel plate,
sleeve, or equivalent at least 1.6 mm
(1/16 in.) thick. A listed
and marked steel plate less than 1.6 mm
(1/16 in.) thick that
provides equal or better protection against nail or screw penetration shall be
permitted for this purpose.
Exception: For concealed work in
finished buildings, or finished panels for prefabricated buildings where such
supporting is impracticable, it shall be permitted to fish the cable between
access points.
334.30. Revise
334.30 as follows [(A), (B), and (C) unchanged from the NEC]:
334.30
Securing and
Supporting. Nonmetallic-sheathed cable shall be secured by
staples, cable ties, straps, or similar fittings so designed and installed as
to not damage the cable. The cable length between the cable entry and the
closest cable support shall not exceed 450 mm (18 in.). Where staples are used
for cable sizes smaller than three 8 AWG conductors, they shall be of the
insulated type, or listed noninsulated staples driven by staple guns shall be
permitted. Cable shall be secured in place at intervals not exceeding 1.4 m
(4½ ft.) and within 300 mm (12 in.) from every cabinet, box, or fitting.
Where the cable is run diagonally behind strapping of a nominal 19 mm (¾
in.) thickness it shall be considered supported, secured, and in compliance
with 334.17 where it is not pulled taut. For other than within 300 mm (12 in.)
of a cable termination at a cabinet, box, or fitting, cables passing through
successive holes in adjacent framing members no more than 600 mm (24 in.) apart
shall be considered to be secured.
Sections of cable protected from physical damage by raceway shall
not be required to be secured within the raceway.
334.80. Delete the second paragraph and
revise the first paragraph to read as follows:
334.80
Ampacity.
Type NM and NMC cables shall have conductors rated at 90°C (194°F).
Where installed in thermal insulation, the ampacity of conductors shall be that
of 60°C (140°F) conductors. The ampacity of Types NM and NMC cables
installed in cable tray shall be determined in accordance with 392.11.
336.10(9). Revise to read as
follows (exception unchanged):
(9) In one- and
two-family dwelling units, Type TC-ER cable containing both power and control
conductors that is identified for pulling through structural members shall be
permitted. Type TC-ER cable used as interior wiring shall be installed in
accordance with the requirements of Part II of Article 334 and Article 725, and
where installed as exterior wiring, shall be installed in accordance with the
requirements of Part II of Article 340.
338.10(B)(4). Insert a third informational
note as follows:
Informational Note No. 3: This section
includes service entrance cables with a round configuration commonly known as
SER cable. The interior installation of this cable is governed by the same
rules as apply to nonmetallic sheathed cable.
338.10(B)(4)(a). Revise the second paragraph
to read, and add a third informational note as follows:
Where installed in thermal insulation, the ampacity shall be in
accordance with the 60°C (140°F) conductor temperature rating. The
maximum conductor temperature rating shall be permitted to be used for ampacity
adjustment and correction purposes, if the final derated ampacity does not
exceed that for a 60°C (140°F) rated conductor.
Informational Note No. 3: This section
includes service entrance cables with a round configuration commonly known as
SER cable. The interior installation of this cable is governed by the same
rules as apply to nonmetallic sheathed cable.
338.10(B)(4)(a)(3). Revise to read as
follows:
Where installed in thermal insulation, the ampacity shall be in
accordance with the 60°C (140°F) conductor temperature rating. The
maximum conductor temperature rating shall be permitted to be used for ampacity
adjustment and correction purposes, if the final derated ampacity does not
exceed that for a 60°C (140°F) rated conductor.
344.6. Add an
exception as follows:
Exception: Rigid metal conduit made from
stainless steel or from nonferrous metals other than aluminum shall be
permitted to be approved.
350.10(4). Delete the words "per 110.14(C)"
from the end of the requirement.
352.12. Add a new (F) to read as follows:
(F)
High-rise
Buildings. Where used in buildings more than 21 m (70 ft.) above
mean grade, rigid nonmetallic conduit shall not be used unless the building is
protected by an approved fire sprinkler system(s) installed on all floors as a
complete system, or the conduit is concealed behind a thermal barrier as
described in 362.10(2) or 362.10(5), or the conduit is encased in not less than
50 mm (2 in.) of concrete.
368.8. Insert a new Section 368.8 in Part I
of Article 368 as follows:
368.8
Tests Prior to Energizing. Busway system joint
tightness, phasing, and insulation resistance shall be verified by test prior
to energizing the system for the first time. Joint resistance shall be
evaluated by a qualified person using equipment identified for the specific
function. A written record of these tests shall be made available to the
authority having jurisdiction.
368.14. Insert a new Section 368.14 in Part
II of Article 368 as follows:
368.14
Protection from Liquids,
Moisture and Other Contaminants. Busway shall be protected from
liquids, moisture, and other contaminants or corrosion that may result in
electrical failure.
(A)
During
Construction. Indoor busways shall be protected from moisture
during storage as well as during or after installation. Special consideration
shall be given to riser busways to protect them from moisture from uncompleted
roofs, walls,
etc.
Outdoor busways shall be treated the same as indoor busways until
after busway is properly installed, as it is not weather resistant until
completely and properly installed.
Busway shall have the exposed ends of uncompleted runs protected
to prevent accidental contamination during the construction
period.
(B)
Protection from Snow Buildup. Outdoor busway shall be
mounted in such a manner as to prevent snow or ice buildup forcing water into
the busway through weep holes. This may require that consideration be given to
horizontal snow or ice buildup or drifting of snow.
(C)
Protection from Falling
Liquids. Slant shields, drip pans, or other approved protective
shields shall be installed to protect indoor busway in locations where there is
a possibility of water spillage or dripping condensate from roof drains, water
pipes, and the like.
368.56(B). Revise the rule in list item (2)
and the exception to (B)(2) to read as follows:
(2) The length of the cord or cable from a
busway plug-in device to a suitable tension take-up support device shall not
exceed 2.5 m (8 ft).
Exception to (B)(2): By special
permission in industrial establishments only, where the conditions of
maintenance and supervision ensure that only qualified persons will service the
installation, flexible cord suitable for hard usage or extra hard usage or bus
drop cable shall be permitted to extend horizontally greater lengths than 2.5 m
(8 ft.) where the longer length is essential for periodic repositioning of
equipment. The flexible cord or bus drop cable shall be supported at intervals
not to exceed 2.5 m (8 ft.), and suitable tension take-up device(s) shall be
installed at the end of the horizontal run to relieve strain in both the
horizontal and vertical directions.
372.23. Revise this section to read as
follows:
372.23
Ampacity of Conductors. The ampacity adjustment
factors in 310.15(C)(1) shall not apply where 30 or fewer current-carrying
conductors occupy no more than 20% of the interior cross-sectional area of
cellular concrete floor raceways.
374.23. Revise this section to read as
follows:
374.23
Ampacity of Conductors. The ampacity adjustment
factors in 310.15(C)(1) shall not apply where 30 or fewer current-carrying
conductors occupy no more than 20% of the interior cross-sectional area of
cellular metal floor raceways.
390.17. Revise this section to read as
follows:
390.17
Ampacity of Conductors. The ampacity adjustment
factors in 310.15(B)(3)(a) shall not apply where 30 or fewer current-carrying
conductors occupy no more than 20% of the interior cross-sectional area of
underfloor raceways.
390.23. Revise
this section to read as follows:
390.23
Ampacity of
Conductors. The ampacity adjustment factors in 310.15(C)(1) shall
not apply where 30 or fewer current-carrying conductors occupy no more than 20%
of the interior cross-sectional area of underfloor raceways.
400.5. Revise Table 400.5(A)(3) to read as
follows:
|
Number of Conductors
|
Percent of Values in Tables 400-5 (A) and
400-5(B)
|
|
4 through 6
|
80
|
|
7 through 24
|
70
|
|
25 through 42
|
60
|
|
43 and above
|
50
|
Informational Note: Overheating may
occur where continuous, fully loaded conductor diversity is less than 50% and
the number of current-carrying conductors exceeds nine. See
310.14(A)(3).
400.12(4).
Revise the existing exception as follows:
Exception to (4): Flexible cord and
cable shall be permitted to be installed in accordance with 368.56(B) and
590.4. For other applications, where the length of the cord from the supply
termination to a suitable tension take-up device is limited to 2.5 m (8 ft.),
flexible cord shall be permitted to have one connection to the building
surface.
400.17. Revise the
second paragraph to read as follows:
Flexible cords and cables shall be permitted to be installed in
raceways not longer than 15 m (50 ft.) in length where required to protect the
flexible cord or cable from physical damage. The ampacity of the conductors
within a raceway shall be adjusted in accordance with Table 400.5(A)(3) based
on the total number of current-carrying conductors within the raceway, and then
further derated by a factor of 0.8, or the ampacity shall be calculated in
accordance with 310.14(B). The raceway shall be exposed over its entire
length.
406.4(D)(3). Delete
the exception.
406.4(D)(4). In
Exception No. 2, correct the reference to read "210.12(D)."
410.16(C). Revise items (1) through (4) to
read as follows:
(1) 300 mm (12 in.) for
surface-mounted incandescent luminaires with a completely enclosed light
source, or for LED luminaires not covered in (2) following, that are installed
on the wall above the door or on the ceiling.
(2) 150 mm (6 in.) for surface-mounted
fluorescent luminaires, or for surface-mounted LED luminaires that are factory
wired with their drivers, and that are installed on the wall above the door or
on the ceiling.
(3) 150 mm (6 in.)
for recessed incandescent luminaires, or for LED luminaires not covered in (4)
following, with a completely enclosed light source, and that are installed in
the wall or the ceiling.
(4) 150 mm
(6 in.) for recessed fluorescent luminaires, or for recessed LED luminaires
that are factory wired with their drivers, and that are installed in the wall
or the ceiling.
410.36(B). Add a second paragraph as follows:
In addition to, or in lieu of, the mechanical
fastening means, luminaires equaling or exceeding 1.8 kg (4 lb.) shall be
directly supported to the building structure or to approved intermediate
supports rigidly secured to the building structure. The luminaire support shall
be by wire, chain, or threaded rod of sufficient strength to carry the
luminaire. Luminaires equal to or greater than 600 mm (2 ft.), nominal, on a
side shall be supported at each end of a diagonal axis, regardless of
weight.
440.14. Insert a
third informational note as follows:
Informational Note No. 3:
See 440.3(B) for general provisions regarding the
inapplicability of Article 440 to equipment that does not incorporate hermetic
refrigerant motor- compressors. See also 430.109(B) for
specific provisions governing the disconnecting requirements for such
equipment, wherever located, that uses a motor that is 1/8 hp or less.
505.9(E)(2). Revise the second
paragraph to read as follows:
Metric threaded fittings installed into explosionproof or
flameproof equipment entries shall have a class of fit of at least 6g/6H and be
made up with at least five threads fully engaged.
517.13(B)(1). Delete Exception No.
2.
517.26. Delete (2), which would
otherwise read: "Section 700.10(D) shall not apply."
550.2
Manufactured Home,
Informational Note No. 2. Add the following sentence:
Manufactured housing that is not designed to be transportable on
running gear, and that is not produced under regulations that expressly cover
such housing, is classified under Article 545.
551.71. Revise (F) to read as follows:
(F)
GFCI Protection.
Ground fault circuit interrupter protection shall be provided for 125-volt, 15
and 20 ampere receptacles. Receptacles within recreational vehicle site
equipment of a higher amperage or voltage rating shall not be subject to the
GFCI provisions in 210.8(B).
Informational Note No 1: Appliances used
within the recreational vehicle can create leakage current levels at the supply
receptacle(s) that could exceed the limits of a Class A GFCI device.
Informational Note No 2: The definition
of power supply assembly in 551.2 and the definition of a feeder in Article 100
clarify that the power supply cord to a recreational vehicle is considered a
feeder.
555.2.
Insert two new definitions as follows:
Docking Facility. A covered or open,
fixed or floating structure that provides access to the water and to which
boats are secured.
Marina. A facility, generally on the
waterfront, that stores and services boats in berths, on moorings, and in dry
storage or stack storage.
555.3. Revise this section to read as
follows:
555.3
Ground-fault Protection. For other than floating
buildings covered by 553.4, ground-fault protection for docking facilities
shall be provided in accordance with (A) and (B).
(A)
Feeder and Branch Circuit
Conductors. Feeder and branch circuit conductors that are
installed on docking facilities shall be provided with ground-fault protection
set to open at currents not exceeding 30 mA. Coordination with downstream
ground-fault protection shall be permitted at the feeder overcurrent protective
device.
Exception: Transformer secondary
conductors of a separately derived system that do not exceed 3 m (10 ft) and
are installed in a raceway shall be permitted to be installed without
ground-fault protection. This exception shall also apply to the supply
terminals of the equipment supplied by the transformer secondary
conductors.
(B)
Receptacles Providing Shore Power. In
lieu of the requirement of 210.8, receptacles installed in
accordance with 555.19(A) shall be permitted to have ground-fault protection
set to open at currents not exceeding 30 mA.
590.4(G). Revise to read as follows:
590.4(G)
Splices. A box, conduit body, or other enclosure, with
a cover installed, shall be required for all splices.
Exception: On construction sites, a box,
conduit body, or other enclosure shall not be required for either of the
following conditions:
(1) The circuit
conductors being spliced are all from nonmetallic multiconductor cord or cable
assemblies, provided further that the equipment grounding continuity is
maintained with or without the box.
(2) The circuit conductors being spliced are
all from metal sheathed cable assemblies terminated in listed fittings that
mechanically secure the cable sheath to maintain effective electrical
continuity.
620.51(D)(2).
Delete this requirement.
625.17(B).
Revise to read as follows:
(B)
Output Cable to the Electric Vehicle. The output cable
to the electric vehicle shall be one of the following:
(1) Listed Type EV, EVJ, EVE, EVJE, EVT, or
EVJT flexible cable as specified in Table 400.4
(2) An integral part of listed electric
vehicle supply equipment
Informational Note: For information and
listing requirements for electric vehicle supply equipment,
see UL Standards 2594-2016, Standard for Electric Vehicle
Supply Equipment, and UL 2202-2009, Standard for Electric Vehicle (EV) Charging
System Equipment.
625.44(A). Revise to read as follows:
625.44(A)
Portable
Equipment. Portable equipment shall be connected to the premises
wiring systems by one or more of the following methods:
(1) A nonlocking, 2-pole, 3-wire
grounding-type receptacle outlet rated 125-volts, single-phase, 15- or
20-amperes.
(2) A nonlocking,
2-pole, 3-wire grounding-type receptacle outlet rated 250-volts, single-phase,
15- or 20-amperes.
(3) A
nonlocking, 2-pole, 3-wire or 3-pole, 4 wire grounding-type receptacle outlet
rated at 250-volts, single-phase, 30- or 50-amperes.
(4) A nonlocking, 2-pole, 3-wire
grounding-type receptacle outlet rated 60-volts dc maximum, 15- or 20-amperes
The length of the power supply cord, if provided, between the
receptacle outlet and the equipment shall be in accordance with 625.17(A)
(3).
625.54. Insert
a new section as follows:
625.54
Ground-fault Circuit-interrupter Protection for
Personnel. All single-phase receptacles installed for the
connection of electric vehicle charging that are rated 150 volts to ground or
less, and 50 amperes or less shall have ground-fault circuit-interrupter
protection for personnel.
625.56.
Insert a new section as follows:
625.56
Receptacle
Enclosures. All receptacles installed in a wet location for
electric vehicle charging shall have an enclosure that is weatherproof with the
attachment plug cap inserted or removed.
680.4. Delete this requirement.
680.8. Insert an informational note ahead of
680.8(A) as follows:
Informational Note: Unlisted swimming
pool pump motors have been observed in the field as having been supplied by
their manufacturer with undersized cords, cords of excessive length, cord
connectors on outdoor applications that are unsuitable for wet locations, and
other violations of this Code. The fact that a manufacturer may supply them in
this form does not excuse compliance with the rules of this Code.
Listed storable swimming pool pump motors with long
factory-supplied cords are prominently marked as such and are not covered in
Part II of Article 680. They are not manufactured for use with permanently
installed pools and they need not be bonded where used as intended.
See 680.31.
680.21(A)(1). Revise the second paragraph to
read as follows:
Where installed in dry, noncorrosive environments, branch
circuits shall comply with the general requirements in Chapter 3. Any wiring
method employed shall contain an insulated or covered equipment grounding
conductor of a wire type, sized in accordance with 250.122, but not smaller
than 12 AWG.
680.23(F)(1).
Wiring Methods. Revise the requirement to read as follows:
Branch circuit wiring on the supply side of enclosures and
junction boxes connected to underwater luminaires and running in corrosive,
wet, or below-grade locations shall comply with 680.14 or shall be liquidtight
flexible nonmetallic conduit. Wiring methods in dry, noncorrosive locations
within or on buildings shall be selected and run in accordance with the
applicable requirements in Chapter 3. Wiring in all locations shall include an
insulated or covered equipment grounding conductor of a wire type, sized in
accordance with 250.122, but not smaller than 12 AWG.
(Exception unchanged from the NEC.)
680.26(B)(2)(b). Insert an additional
paragraph to follow the five item list and reading as follows:
"This method shall only be permitted for above-ground
pools."
680.74(A). Delete
numbered paragraphs (3), (4), and (5). Delete Exception No. 1 and designate
Exception No. 2 as Exception No. 1.
690.31(D)(2). Revise the second sentence of
the second paragraph to read as follows:
The labels shall be reflective, all letters shall be capitalized,
and the letters shall have a minimum height of 9.5 mm (% in.) in white on a red
background.
690.56. Insert
the following Informational Note after the section title and before 690.56(A):
Informational Note: The Massachusetts
Comprehensive Fire Code,
527 CMR 1.00, requires signage
adjacent to the building or service disconnect that provides contact
information and identifies the party responsible for the operation of the PV
system.
Article 691. Delete this article.
682.2. Insert a new definition as
follows:
Pier. A structure extending over the
water and supported on a fixed foundation, or on flotation, that provides
access to the water.
682.15.
Revise to read as follows:
682.15
Ground-Fault Protection. Ground-fault protection shall
be provided in accordance with (A) and (B).
(A)
Receptacles.
Fifteen- and 20-ampere single-phase, 125-volt through 250-volt receptacles
installed outdoors and in or on floating buildings or structures within the
electrical datum plane area shall be provided with GFCI protection for
personnel. The GFCI protection device shall be located not less than 300 mm (12
in.) above the established electrical datum plane.
(B)
Feeder and Branch Circuit
Conductors. Feeder and branch circuit conductors that are
installed on piers shall be provided with ground-fault protection set to open
at currents exceeding 30 mA. Coordination with downstream ground-fault
protection shall be permitted at the feeder overcurrent protective device.
Exception: Transformer secondary
conductors of a separately derived system that do not exceed 3 m (10 ft) and
are installed in a raceway shall be permitted to be installed without
ground-fault protection. This exception shall also apply to the supply
terminals of the equipment supplied by the transformer secondary
conductors.
700.10.
Make the following three revisions:"
I.
Revise (D) to read as follows: "Emergency systems shall meet the additional
requirements in (D)(1) through (D)(3)."
II. Revise (D)(1) by deleting (1) and
renumbering the remaining numbered items accordingly.
III. Revise the resulting (D)(1)(2) to read
as follows: "The cable or raceway is a listed fire-resistive cable system with
a minimum two-hour fire rating."
Article 691. Delete this
article.
700.10(D). Revise as follows:
I. Insert the following title and parent
wording:
Fire Protection. Emergency systems shall
meet the additional requirements in 700.10(D)(1) through
(D)(3).
II. Delete (D)(1);
renumber (D)(2) through (D)(4) as (D)(1) through (D)(3).
III. Delete (1) in the resulting (D)(1);
renumber (2) through (5) as (1) through (4).
700.12. Add an exception after the first
paragraph as follows:
Exception: A fire pump shall be
permitted to use a connection ahead of the service disconnecting means in
accordance with 695.3(A)(1).
700.12(F)(2)(2). Delete the second sentence
that reads:
Flexible cord- and plug-connection shall be permitted provided
that the cord does not exceed 900 mm (3 ft) in length.
701.12(G). Delete the second sentence of the
second paragraph which reads:
Flexible cord- and plug-connection shall be permitted provided
that the cord does not exceed 900 mm (3 ft) in length.
700.12(I)(2)(2). Delete the second sentence
that reads:
Flexible cord- and plug-connection shall be permitted provided
that the cord does not exceed 900 mm (3 ft.) in length.
701.12(J). Delete the second sentence of the
second paragraph which reads:
Flexible cord- and plug-connection shall be permitted provided
that the cord does not exceed 900 mm (3 ft.) in
length.
725.2.
Insert a new definition and informational note as follows:
Nominal Current. The designated current
per conductor as specified by equipment design.
Informational Note: One example of
nominal current is 4-pair Power over Ethernet (PoE) applications based on IEEE
802.3-2015, IEEE Standard for Ethernet, that supplies current over 2 or 4
twisted pairs. The nominal current for 60-watt PoE power-sourcing equipment is
0.3 amperes per conductor, where the current in one conductor can be 0.36
amperes and another conductor can be 0.24 amperes.
725.121(C). Revise to read as follows:
725.121(C)
Marking. The power sources for limited power circuits
in 725.121(A)(3) and limited power circuits for listed audio/video,
information, and communications technology (equipment), and listed industrial
equipment in 725.121(A)(4) shall have a label indicating the maximum voltage
and maximum current or maximum voltage and nominal current output for each
connection point. Where multiple connection points have the same rating, a
single label shall be permitted to be used. The effective date shall be January
1, 2018.
Exception: Marking shall not be required
for power sources providing 0.3 amperes nominal current or less per
conductor.
725.144(A). Revise
to read as follows:
725.144(A)
Use of Class 2 or Class 3 Cables to Transmit Power and
Data. Where Types CL3P, CL2P, CL3R, CL2R, CL3, or CL2 transmit
power and data, the ampacity ratings in Table 725.144 shall apply to the
nominal current at an ambient temperature of 30°C (86°F). For ambient
temperatures above 30°C (86°F), the correction factors of 310.15(B)(2)
shall apply.
Exception: Compliance with Table 725.144
shall not be required for installations where the nominal current does not
exceed 0.3 amperes in any conductor.
725.144(B). Revise the first paragraph to
read as follows:
725.144(B)
Use of Class 2-LP or Class 3-LP Cables to Transmit Power and
Data. Types CL3P-LP, CL2P-LP, CL3R-LP, CL2R-LP, CL3-LP, or CL2-LP
shall be permitted to supply power to equipment at a current level up to the
marked ampere limit located immediately following the suffix LP and shall be
permitted to transmit data to the equipment. For ambient temperatures above
30°C (86°F), the correction factors of 310.15(B)(2) shall apply. The
Class 2-LP and Class 3-LP cables shall comply with the following, as
applicable:
770.110(A)(2). Revise to
read as follows:
770.110(A)(2)
Communications Raceways. Optical fiber cables shall be
permitted to be installed in plenum communications raceways, riser
communications raceways, and general-purpose communications raceways selected
in accordance with Table 800.154(b), listed in accordance with 800.182, and
installed in accordance with 800.113 and 362.24 through 362.56, where the
requirements applicable to electrical nonmetallic tubing (ENT) apply.
840.2. Insert a new definition and
informational note as follows:
Nominal Current. The designated current
per conductor as specified by equipment design.
Informational Note: One example of
nominal current is 4-pair Power over Ethernet (PoE) applications based on IEEE
802.3-2015, IEEE Standard for Ethernet, that supplies current over 2 or 4
twisted pairs. The nominal current for 60-watt PoE power-sourcing equipment is
0.3 amperes per conductor, where the current in one conductor can be 0.36
amperes and another conductor can be 0.24 amperes.
840.160. Revise to read as follows:
840.160
Powering
Circuits. Communications cables, in addition to carrying the
communications circuit, shall also be permitted to carry circuits for powering
communications equipment. Installations of listed communications cables shall
comply with 725.144 where listed communications cables are used in place of
Class 2 and Class 3 cables.
Exception: Compliance with 725.144 shall
not be required for installations of listed 4-pair communications cables where
the nominal current does not exceed 0.3 amperes in any
conductor.
