Energy Guide

Page 46 of 104 Report No.: HK2107050725-SR
UL 507
Clause Requirement + Test Result - Remark Verdict
TRF No. UL507A
31.2.4 The following applies to secondary circuits that
comply with the limiting impedance requirements of
31.6.1 – 31.6.2:
N/A
a)Components located within these circuits are not
required to be evaluated.
b)Spacings located within these circuits and from
these circuits to earth ground or to the enclosure
are not required to be evaluated. However,
spacings from these circuits to other circuits shall
be in accordance with Section 30, Spacings.
c)These circuits are not prohibited from being
accessible from outside the enclosure.
N/A
31.3 Class 2 circuit requirements N/A
31.3.1 A Class 2 circuit shall be supplied by an isolating
source that complies with the requirements in the
Standard for Class 2 Power Units, UL 1310, or the
requirements in the Standards for Low Voltage
Transformers – Part 1: General Requirements, UL
5085-1 and Low Voltage Transformers – Part 3:
Class 2 and Class 3 Transformers, UL 5085-3.
N/A
31.4 Limited voltage/current circuit requirements N/A
31.4.1 A limited voltage/current circuit shall be supplied by
an isolating source such that the maximum open
circuit voltage potential available to the circuit is not
more than 30 V ac or 42.4 V peak and the current
available is limited to a value not exceeding 8
amperes measured after 1 minute of operation.
The secondary winding of an isolating type
transformer meets the intent of compliance with
this requirement. The transformer shall comply with
the requirements in the appropriate UL Standards
for Transformers.
N/A
31.4.2 With reference to these secondary voltage and
current limits, these measurements are to be made
as follows:
N/A