Current through Register Vol. 49, No. 13, September 23, 2024
Subpart
1.
National standards.
Except as otherwise provided in subpart
2 or
3, as a condition for
approval under Minnesota Statutes, section
326B.35, and
Section 110-2 of the National Electrical Code, all electrical equipment,
including material, fittings, devices, apparatus, fixtures, appliances, and
utilization equipment, used as part of, or in connection with, an electrical
installation shall be listed and labeled by a testing
laboratory.
Subp. 2.
Alternatives to listing and labeling.
With the exception of electrical equipment of types
specifically required to be listed by the National Electrical Code, the board
shall accept one of the applicable methods described in item A or B as an
alternative to listing and labeling.
A. Evaluation by a testing laboratory or by a
registered or licensed electrical engineer who has no financial or other
interest in the manufacture or sale of the equipment, provided that any
deficiencies identified by the evaluation are corrected and the equipment
complies with the listed requirements. A written report of the evaluation shall
be submitted directly to the board, and shall state the standards that were
applied in the evaluation. Evaluation reports by an electrical engineer acting
independently of a testing laboratory shall also include an item-by-item
comparison of the equipment with the requirements to be listed. If the board
finds that the evaluation or evaluation report is incomplete or inaccurate, it
retains the right to require further evidence of compliance or to reject the
equipment.
Evaluations conducted according to the procedures in this
item shall be considered evidence of compliance of all identical equipment
produced by that manufacturer for a period of one year from the time the
evaluation was completed, or until the equipment has been listed, whichever is
less, provided that the manufacturer has applied for listing of the equipment,
or produces fewer than 100 such units per year. Where additional identical
equipment will be produced, the manufacturer shall provide the board with a
written statement giving the equipment model number and agreeing that all
subsequent equipment will be identical to that which was evaluated and, where
the equipment has not been submitted for listing, shall also provide a written
report to the board 12 months from the date of the evaluation report which
lists the serial numbers of the equipment installed in Minnesota over the
preceding 12 months.
Where deficiencies are identified by the initial evaluation
report, those deficiencies shall be corrected for all subsequent units, the
changes shall be verified by the person who performed the initial evaluation,
and an amended report shall be submitted to the board. If the manufacturer
deviates from the construction established by the evaluation report, the
equipment shall be reevaluated and any noncomplying equipment that was sold
brought into compliance.
Where the evidence of compliance is an evaluation according
to this item, the manufacturer shall affix a durable permanent label to the
equipment in a readily visible location, which states: "This equipment is
identical to equipment that was evaluated by (name), and found to be in
compliance with the requirements to be listed. A copy of the evaluation report
was filed with the Minnesota State Board of Electricity on (date)."
B. Where procedures acceptable to
the testing laboratory are followed, a manufacturer of unlisted equipment shall
be permitted to submit the equipment to another manufacturer of similar listed
equipment for evaluation, correction of noncomplying construction, and
labeling.
Subp. 3.
Equipment exempt from listing requirements.
Equipment described in items A to E is exempt from the
requirements in subparts
1 and
2.
A. Industrial machinery as defined by Section
670-2 of the National Electrical Code is not required to be listed where all
electrical components of the equipment, including electrical control panels and
solid-state motor controls, are in compliance with item B, C, or D, or subpart
1 or
2, and all of the machine
electrical wiring is in compliance with the National Electrical Code.
B. Electrical equipment enclosed in a listed
cabinet or box suitable for the environment in which it is installed, and
electrically connected only to circuits supplied from listed Class 2, logic
level, communications, or other circuits with maximum open circuit voltage of
30 volts rms AC, or DC, and overcurrent protection of eight amperes or less, or
to any combination of such circuits, is not required to be listed, provided
further that any printed wiring boards shall be of listed material and shall be
permitted to be supplied from a labeled microcomputer power supply.
C. Electrical control equipment constructed
according to the listed requirements and enclosed in a listed cabinet or box
suitable for the environment in which it is located, where the enclosed
equipment consists of eight or fewer listed components, other than wires,
cables, cords, terminal assemblies, nonelectrical components, and those covered
under item B, provided that the devices are not electrically connected to
circuits on a printed wiring board other than those circuits covered under item
B, is not required to be listed.
D.
Custom-made electrical equipment or related installations that are designed and
manufactured to a purchasers specifications and are not marketed to the general
public are exempt from listing and labeling requirements. Equipment or
installations exempt under this item are subject to the following:
(1) they must be determined to be safe for
their intended use by the manufacturer on the basis of test data which the
purchaser keeps and makes available to the electrical inspection authority
having jurisdiction, as required by Code of Federal Regulations, title 29,
section 1910.399(1991), for equipment or installations subject to national
occupational safety and health laws; or
(2) they must be inspected by the electrical
inspection authority having jurisdiction for compliance with the construction
requirements of the applicable electrical standards used by electrical testing
laboratories to evaluate the equipment, or the National Electrical Code.
Schematic wiring diagrams, component layout diagrams, and component electrical
rating information shall be provided to enable evaluation under this
subitem.
E. Utilization
equipment as defined by the National Electrical Code is not required to be
listed if:
(1) the equipment includes eight or
fewer electrical components which are listed or are exempt from listing by item
B or C; and
(2) all wiring that is
part of the equipment is in compliance with the National Electrical
Code.
