1. Safety on
Rangehood based on UL 507
By
May, 2009
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22. To assure safe and healthful working conditions
for working men and women; by authorizing
enforcement of the standards developed under
the Act; by assisting and encouraging the States
in their efforts to assure safe and healthful
working conditions; by providing for research,
information, education, and training in the field of
occupational safety and health; and for other
purposes.
the original
23. The OSH Act 1970
Occupational Safety and Health Act of 1970
December 29, 1970
29. OSHA need authorize and
monitor private sector
organizations, so NRTL program
came into existence.
30. In the evaluation of the NRTLs,
OSHA will use either
consensus-based standards
currently in use nationally, or
other standards or criteria which
may be considered appropriate.
31. The NRTL determines that
specific equipment and materials
(quot;productsquot;) meet consensus-
based standards of safety to
provide the assurance, required
by OSHA, that these products are
safe for use in the U.S. workplace.
32. NRTLs are third-party organizations recognized
by OSHA as having the capability to provide product
safety testing and certification services to the
manufacturers of a wide range of products for use in
the American workplace.
The testing and certifications are based on product
safety standards developed by U.S.-based standards
developing organizations and often issued by the
American National Standards Institute (ANSI).
33. Many product “approval” requirements are
found in OSHA’s standards (29 CFR Parts
1910, 1915, 1918, and 1926). Approval, i.e.,
NRTL testing and certification, is required for
many types of products, including
– Electrical equipment
– Fire detecting and extinguishing equipment
– Liquefied Petroleum Gas (LPG) utilization
equipment
– Equipment to be used in hazardous locations
45. 2.3.3 ENCLOSURE - That part of the product that:
a) Renders inaccessible all or any parts of the fan
that present a risk of electric shock or injury to
persons due to total or partial collapse with a
resulting reduction of spacings, loosening or
displacement of parts, or other serious defects; or
b) Retards propagation of flame initiated by
electrical disturbances occurring within.
48. 2.3.3 ENCLOSURE - That part of the product that:
a) Renders inaccessible all or any parts of the fan
that present a risk of electric shock or injury to
persons due to total or partial collapse with a
resulting reduction of spacings, loosening or
displacement of parts, or other serious defects; or
b) Retards propagation of flame initiated by
electrical disturbances occurring within.
49. Enclosure Material:
Metal
Gavanized sheet steel, 0.74 mm
Uncoated sheet steel, 0.66 mm
Nonferrous sheet steel, 0.91 mm
Non-Metal
Polymeric material, ? mm
50. 6.3 Non-metallic enclosures
6.3.1 A non-metallic enclosure shall comply with the
applicable mechanical and electrical property
considerations, flammability, and thermal requirements as
specified in the Standard for Polymeric Materials - Use in
Electrical Equipment Evaluations, UL 746C.
57. 2.3.3 ENCLOSURE - That part of the product that:
a) Renders inaccessible all or any parts of the fan
that present a risk of electric shock or injury to
persons due to total or partial collapse with a
resulting reduction of spacings, loosening or
displacement of parts, or other serious defects; or
b) Retards propagation of flame initiated by
electrical disturbances occurring within.
71. Power supply cord:
91.6.4 For cord-connected rangehoods, the cord type
shall be one of the following: HS, HSO, HSJ, HSJO, S,
SE, SO, SOO, ST, STO, STOO, SJ, SJO, SJOO, SJT,
SJTO, or SJTOO.
72. Power supply cord:
91.6.5 The length of a rangehood cord shall not be
less than 3 ft (0.9 m) and shall not be more than 4 ft
(1.22 m),
3 ft (0.9 m) ≤ length ≤ 4 ft (1.22 m)
73. Power supply cord:
91.6.8 The attachment plug of a power supply cord for
a cord-connected rangehood shall be of the
grounding type.
74. Power supply cord:
91.6.11 A flexible power supply cord for a cord-
connected rangehood shall vertically exit the top-
most horizontal surface of the rangehood.
81. Wiring terminals
and leads:
A = fixed part
B = washer or clamping plate
C = anti-spread device
D = conductor space
Screws need retaining means for
conductors, such as upturned lugs,
a cupped washer, or the equivalent
87. Field Wiring compartment:
Volume Calculation
Note - The usable volume of terminal
compartments should be considered the net
volume less the volume of any components
located within the terminal compartment
such as capacitors, switches, relays, and
terminal blocks.
88. Field Wiring compartment:
Volume Calculation
For a given rangehood which employs 2 supply
leads of 18AWG plus 1 grounding lead, there are 1
capacitor of 4 cm by 3 cm by 1 cm within the field
wiring compartment:
Branch supply
conductors within
House, 14 AWG
100. (e) Marking—
(1) Identification of manufacturer (2) Durability. The marking shall be
and ratings. Electric equipment of sufficient durability to withstand
may not be used unless the following the environment involved.
markings have been placed on
the equipment:
(i) The manufacturer’s name, trademark,
or other descriptive marking by
which the organization responsible for
the product may be identified; and
(ii) Other markings giving voltage,
current, wattage, or other ratings as
29CFR1910.303
necessary.
101. 62.1 General
62.1.1 An appliance shall be plainly and permanently
marked where visible with:
a) The manufacturer's name, trademark, or other
descriptive marking by which the organization
responsible for the product is identified - hereinafter
referred to as the manufacturer's name;
b) A distinctive catalog number or the equivalent;
c) The electrical rating; and
d) The date or other dating period of manufacture not
exceeding any three consecutive months. See 62.1.2.
For a permanently-connected appliance, the marking
shall be visible after installation.
UL 507
105. 64A.3 A small part not provided with the
appliance for mounting shall be referenced
in the installation instructions.
64A.4 An accessory for a permanently
installed fan shall be provided with
instructions detailing proper installation
procedures.
106. To Identify
Remote blower assemblies
CONSTRUCTION Ducted
Integral blower assemblies
Non-ducted
Ceiling/Island Mount
INSTALLATION Wall Mount
Under-Cabinet Mount
