4.24.8.7 Markings. All electrode-type boilers shall be marked to show
the following:
(1) The manufacturer’s name
(2) The normal rating in volts, amperes, and kilowatts
(3) The electrical supply required specifying frequency, number of
phases, and number of wires
(4) The marking “Electrode-Type Boiler”
(5) A warning marking, “All Power Supplies Shall Be
Disconnected Before Servicing, Including Servicing the Pressure
Vessel”
The nameplate shall be located so as to be visible after installation.
4.24.9 Electric Radiant Heating Panels and Heating Panel Sets
4.24.9.1 Scope. The provisions of Part 4.24.9 shall apply to radiant
heating panels and heating panel sets.
4.24.9.2 Definitions.
Heating Panel. A complete assembly provided with a junction box
or a length of flexible conduit for connection to a branch circuit.
Heating Panel Set. A rigid or nonrigid assembly provided with
nonheating leads or a terminal junction assembly identified as being
suitable for connection to a wiring system.
4.24.9.3 Markings.
(a) Location. Markings shall be permanent and in a location that is
visible prior to application of panel finish.
(b) Identified as Suitable. Each unit shall be identified as suitable
for the installation.
(c) Required Markings. Each unit shall be marked with the
identifying name or identification symbol, catalog number, and rating
in volts and watts or in volts and amperes.
(d) Labels Provided by Manufacturer. The manufacturers of
heating panels or heating panel sets shall provide marking labels that
indicate that the space-heating installation incorporates heating panels
or heating panel sets and instructions that the labels shall be affixed to
the panelboards to identify which branch circuits supply the circuits to
those space-heating installations. If the heating panels and heating
panel set installations are visible and distinguishable after installation,
the labels shall not be required to be provided and affixed to the
panelboards.
4.24.9.4 Installation.
(a) General.
(1) Manufacturer's Instructions. Heating panels and heating panel
sets shall be installed in accordance with the manufacturer’s
instructions.
(2) Locations Not Permitted. The heating portion shall not be
installed as follows:
a. In or behind surfaces where subject to physical damage
b. Run through or above walls, partitions, cupboards, or similar
portions of structures that extend to the ceiling.
c. Run in or through thermal insulation, but shall be permitted to
be in contact with the surface of thermal insulation.
(3) Separation from Outlets for Luminaires (Lighting Fixtures).
Edges of panels and panel sets shall be separated by not less than
200 mm from the edges of any outlet boxes and junction boxes that are
to be used for mounting surface luminaires (lighting fixtures). A
clearance of not less than 50 mm shall be provided from recessed
luminaires (fixtures) and their trims, ventilating openings, and other
such openings in room surfaces, unless the heating panels and panel
sets are listed and marked for lesser clearances, in which case they
shall be permitted to be installed at the marked clearances. Sufficient
area shall be provided to ensure that no heating panel or heating panel
set is to be covered by any surface-mounted units.
(4) Surfaces Covering Heating Panels. After the heating panels or
heating panel sets are installed and inspected, it shall be permitted to install a surface that has been identified by the manufacturer’s
instructions as being suitable for the installation. The surface shall be
secured so that the nails or other fastenings do not pierce the heating
panels or heating panel sets.
(5) Surface Coverings. Surfaces permitted by 4.24.9.4(a)(4) shall
be permitted to be covered with paint, wallpaper, or other approved
surfaces identified in the manufacturer’s instructions as being suitable.