Interchangeability: Words stated in the present
tense include the future; gender-based words are intended as neutral;
the singular number includes the plural and the plural the singular.
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Terms Defined in Other Codes: Where terms are
not defined in this code and are defined in the Building, Mechanical,
or Plumbing Codes adopted by St. Louis County in Chapters 1115, 1103,
and 1108 SLCRO 1974, as amended, such terms shall have the meanings
ascribed to them as in those codes.
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Article 100. Definitions.
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(A)
|
GENERAL:
| |
Aid or Abet: To help, assist, advance, facilitate
or promote the acquisition of an electrical permit for work performed
by an unlicensed individual not working as an employee under the direct
supervision of a license holder in St. Louis County.
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Board of Appeals: The five-member panel created
in Chapter 1115 SLCRO 1974, as amended, which has authority to hear
and decide appeals from decisions of the Code Official or the Board
of Electrical Examiners pursuant to the provisions of this code.
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Building Commission: The five-member panel set forth in Article IV, Section 4.330, of the St. Louis County Charter.
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Code: These regulations, subsequent amendments
thereto, or any emergency rule or regulation which the administrative
authority having jurisdiction has lawfully adopted.
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Code Official: The Director of Transportation
and Public Works or the Director's duly authorized representative
who is vested with executive and administrative authority to enforce
all laws, ordinances and codes regulating construction, alteration,
addition, repair, removal, demolition, use, location, occupancy and
maintenance of all buildings and structures, electrical, plumbing,
drainlaying and mechanical systems pursuant to Chapters 1100, 1115,
1102, 1103, 1104 and 1108 SLCRO 1974, as amended.
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Construction Documents: All of the written,
graphic and pictorial documents prepared or assembled for describing
the design, location and physical characteristics of the elements
of the project necessary for obtaining an electrical permit.
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Disaster: A disaster shall include but not
necessarily be limited to flood, windstorm, tornado, severe storm,
earthquake, bomb blast, explosion or similar natural or man-made type
event. The Code Official shall make the determination whether an event
shall be declared a disaster.
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Emergency: An event or occasion that requires
immediate action in order to preserve or restore the public peace,
health, safety or welfare.
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Employee: A person who has been hired by a
business entity licensed under this code to perform work regulated
by this code. The licensed business entity shall keep true and accurate
payroll and other related records that are required by law for a period
of at least three years after such record was made.
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A person is an "employee" if the person:
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•
|
Performs services for wages or salary for a business entity
that submits IRS Forms W-2, W-4 and I-9 for that person.
| |
•
|
May be disciplined or discharged by the business entity.
| |
•
|
Is directed by the business entity on what work to do, when
to do it and in what sequence the work will occur.
| |
•
|
Performs services that are incorporated into the business entity's
operation and significantly affect the success of the business.
| |
•
|
Is required to undergo company-provided training.
| |
•
|
Uses the business entity's tools, equipment, materials and work
facilities.
| |
All determinations with respect to whether a person is an "employee"
or "full-time employee" will be decided by the Code Official.
| ||
Full-time employee: An employee of a business
entity licensed under this code who performs tasks solely for this
business entity during normal hours of operation of the business entity.
| ||
Existing Work: Any electrical system regulated
by this code which was legally installed prior to the effective date
of this code, or for which a permit to install has been issued.
| ||
Grandfathering: Approval of the continued use
of an existing system or part of an electrical system that complies
with the code requirements under which the system or part was installed,
including the requirements for licensure and permits contained within
this code.
| ||
Registered Design Professional: An architect
or engineer, registered or licensed to practice professional architecture
or engineering pursuant to the professional registration laws of the
state of Missouri.
| ||
Structure: That which is built or constructed
or a portion thereof.
| ||
Workmanlike Manner: An electrical installation
which complies with the published American National Standard "Good
Workmanship in Electrical Construction."
|
Article 210.8. Ground-Fault Circuit-Interrupter Protection
for Personnel. Groundfault circuit-interrupter protection
for personnel shall be provided as required in 210.8(A) through (C).
The ground-fault circuit-interrupter shall be installed in a readily
accessible location.
| |||
Informational Note: See 215.9 for ground-fault
circuit-interrupter protection for personnel on feeders.
| |||
(A)
|
Dwelling Units. All 125-volt, single-phase,
15- and 20-ampere receptacles installed in the locations specified
in 210.8(A)(1) through (10) shall have ground-fault circuit-interrupter
protection for personnel.
| ||
(1)
|
Bathrooms.
| ||
(2)
|
Garages, and also accessory buildings that have a floor located
at or below grade level not intended as habitable rooms and limited
to storage areas, work areas, and areas of similar use.
| ||
(3)
|
Outdoors.
| ||
Exception to (3): Receptacles that are not readily accessible
and are supplied by a branch circuit dedicated to electric snow-melting,
deicing, or pipeline and vessel heating equipment shall be permitted
to be installed in accordance with 426.28 or 427.22, as applicable.
| |||
(4)
|
Crawl spaces, at or below grade level.
| ||
(5)
|
Unfinished basements. For the purpose of this section, unfinished
basements are defined as portions or areas of the basement not intended
to be habitable rooms and limited to storage areas, work areas, and
the like.
| ||
Exception No. 1 to (2) and (5): A single receptacle
or a duplex receptacle for two appliances located within dedicated
space for each appliance that, in normal use, is not easily moved
from one place to another and that is cord- and plug-connected in
accordance with 400.7(A)(6), (A)(7) or (A)(8). Exception No. 2 to
(5): A receptacle supplying only a permanently installed fire alarm
or burglar alarm system shall not be required to have ground-fault
circuit-interrupter protection.
| |||
Informational Note: See 760.41(B) and 760.121(B)
for power supply requirements for fire alarm systems.
| |||
Receptacles installed under the Exception No. 2 to 210.8(A)(5)
shall not be considered as meeting the requirements of 210.52(G).
| |||
(6)
|
Kitchens, where the receptacles are installed to serve the countertop
surfaces.
| ||
(7)
|
Sinks, where receptacles are installed within 1.8 m (6 feet)
of the outside edge of the sink.
| ||
(8)
|
Boathouses.
| ||
(9)
|
Bathtubs or shower stalls, where receptacles are installed within
1.8 m (6 feet) of the outside edge of the bathtub or shower stall.
| ||
(10)
|
Laundry areas with a sink.
| ||
210.12. Arc-Fault Circuit-Interrupter Protection. Arc-fault circuit-interrupter protection shall be provided as required
in 210.12(A), (B) and (C). The arc-fault circuit-interrupter shall
be installed in a readily accessible location.
| |||
(A)
|
Dwelling Units. All 120-volt, single-phase,
15- and 20-ampere branch circuits supplying outlets or devices installed
in bedrooms shall be protected by any of the means described in 210.12(A)(1)
through (6):
| ||
(1)
|
A listed combination-type arc-fault circuit-interrupter, installed
to provide protection of the entire branch circuit.
| ||
(2)
|
A listed branch/feeder-type arc-fault circuit-interrupter installed
at the origin of the branch circuit in combination with a listed outlet
branch circuit type arc-fault circuit-interrupter installed at the
first outlet box on the branch circuit. The first outlet box in the
branch circuit shall be marked to indicate that it is the first outlet
of the circuit.
| ||
(3)
|
A listed supplemental arc protection circuit breaker installed
at the origin of the branch circuit in combination with a listed outlet
branch circuit type arc-fault circuit-interrupter installed at the
first outlet box on the branch circuit where all of the following
conditions are met:
| ||
a.
|
The branch circuit wiring shall be continuous from the branch
circuit overcurrent device to the outlet branch circuit arc-fault
circuit-interrupter.
| ||
b.
|
The maximum length of the branch circuit wiring from the branch
circuit overcurrent device to the first outlet shall not exceed 15.2
m (50 feet) for a 14 AWG conductor or 21.3 m (70 feet) for a 12 AWG
conductor.
| ||
c.
|
The first outlet box in the branch circuit shall be marked to
indicate that it is the first outlet of the circuit.
| ||
(4)
|
A listed outlet branch circuit type arc-fault circuit-interrupter
installed at the first outlet on the branch circuit in combination
with a listed branch circuit overcurrent protective device where all
of the following conditions are met:
| ||
a.
|
The branch circuit wiring shall be continuous from the branch
circuit overcurrent device to the outlet branch circuit arc-fault
circuit-interrupter.
| ||
b.
|
The maximum length of the branch circuit wiring from the branch
circuit overcurrent device to the first outlet shall not exceed 15.2
m (50 feet) for a 14 AWG conductor or 21.3 m (70 feet) for a 12 AWG
conductor.
| ||
c.
|
The first outlet box in the branch circuit shall be marked to
indicate that it is the first outlet of the circuit.
| ||
d.
|
The combination of the branch circuit overcurrent device and
outlet branch circuit arc-fault circuit-interrupter shall be identified
as meeting the requirements for a system combination-type arc-fault
circuit-interrupter and shall be listed as such.
| ||
(5)
|
If RMC, IMC, EMT, type MC, or steel-armored type AC cables meeting
the requirements of 250.118, metal wireways, metal auxiliary gutters,
and metal outlet and junction boxes are installed for the portion
of the branch circuit between the branch circuit overcurrent device
and the first outlet, it shall be permitted to install a listed outlet
branch circuit type AFCI at the first outlet to provide protection
for the remaining portion of the branch circuit.
| ||
(6)
|
Where a listed metal or nonmetallic conduit or tubing or type
MC cable is encased in not less than 50 mm (2 inches) of concrete
for the portion of the branch circuit between the branch circuit overcurrent
device and the first outlet, it shall be permitted to install a listed
outlet branch circuit type AFCI at the first outlet to provide protection
for the remaining portion of the branch circuit.
| ||
Exception: Where an individual branch circuit to a fire
alarm system installed in accordance with 760.41(B) or 760.121(B)
is installed in RMC, IMC, EMT, or steel sheathed cable, type AC or
type MC, meeting the requirements of 250.118, with metal outlet and
junction boxes, AFCI protection shall be permitted to be omitted.
| |||
Informational Note No. 1: For information on
combination-type and branch/feeder-type are-fault circuit-interrupters,
see UL 1699-2011, Standard for Arc-Fault Circuit-Interrupters. For information on outlet branch circuit type arc-fault circuit-interrupters,
see UL Subject 1699A, Outline of Investigation for Outlet
Branch Circuit Arc-Fault Circuit-Interrupters. For information
on system combination AFCIs, see UL Subject 1699C, Outline
of Investigation for System Combination Arc-Fault Circuit-Interrupters.
| |||
Informational Note No. 2: See 29.6.3(5) of NFPA 72-2013 National Fire Alarm and Signaling Code, for
information related to secondary power-supply requirements for smoke
alarms in dwelling units.
| |||
Informational Note No. 3: See 760.41(B) and
760.121(B) for power-supply requirements for fire alarm systems.
| |||
210.12(B). Branch Circuit Extensions or Modifications-Dwelling
Units. In any of the areas specified in 210.12(A), where
branch circuit wiring is modified, replaced or extended, the branch
circuit shall be protected by one of the following:
| |||
(1)
|
A listed combination-type AFCI located at the origin of the
branch circuit.
| ||
(2)
|
A listed outlet branch circuit type AFCI located at the first
receptacle outlet of the existing branch circuit.
| ||
Exception: AFCI protection shall not be required
where the extension of the existing conductors is not more than 9.5
m (30 feet) and does not include any additional outlets or devices.
| |||
210.12(C). Dormitory Units. All 120-volt, single-phase,
15- and 20-ampere branch circuits supplying outlets installed in dormitory
unit bedrooms, living rooms, hallways, closets, and similar rooms
shall be protected by a listed arc-fault circuit interrupter meeting
the requirements of 210.12(A)(1) through (6) as appropriate.
| |||
406.12 Tamper-Resistant Receptacles. Tamper-resistant
receptacles shall be installed as specified in 406.12(A) and (B).
| |||
(A)
|
Guest Rooms and Guest Suites of Hotels and Motels. All nonlocking-type 125-volt, 15- and 20-ampere receptacles located
in guest rooms and guest suites of hotels and motels shall be listed
tamper-resistant receptacles.
| ||
(B)
|
Child-Care Facilities. In all child-care facilities,
all nonlocking-type 125-volt 15- and 20-ampere receptacles shall be
listed tamper-resistant receptacles.
| ||
Exception to (A) and (B): Receptacles in the following
locations shall not be required to be tamper resistant:
| |||
(1)
|
Receptacles that are more than 1.7 m (5 1/2 feet) above
the floor.
| ||
(2)
|
Receptacles that are part of a luminaire or appliance.
| ||
(3)
|
A single receptacle or a duplex receptacle for two appliances
located within dedicated space for each appliance that, in normal
use, is not easily moved from one place to another and that is cord
and plug-connected in accordance with 400.7(A)(6), (A)(7), or (A)(8).
| ||
(4)
|
Nongrounding receptacles used for replacements as permitted
in 406.4(D)(2)(a).
|