UL 458:6ED 2015-09-02

Foreword
Introduction
1 Scope
2 Glossary
3 Components
4 General
Part I - Power convertors and inverters
Construction
5 General
6 Frame and enclosure
7 Enclosures used for protected environments
8 Accessibility of uninsulated live parts, film-
       coated wire, and moving parts
9 Assembly
10 Protection against corrosion
11 Supply connections
12 Low-voltage output connections and wiring
13 Secondary circuits
14 Live parts
15 Internal wiring
16 Insulating materials
17 Transformers
18 Resistors
19 Switches and controllers
20 Overload-protective devices
21 Fuses and fuseholders
22 Receptacles
23 Inverter output circuits
24 Lampholders
25 Capacitors
26 Transient voltage surge suppressors
27 Printed wiring
28 Spacings
29 Grounding
30 Bonding of internal parts
Performance
31 General
32 Leakage current test
33 Power input test
34 Output voltage measurement test
35 Capacitor voltage measurement test
36 Output voltage and current test
37 Temperature test
38 External surface temperature limits test
39 Dielectric voltage-withstand test
40 Induced potential test
41 Testing on transformer insulating materials
42 Strain relief test
43 Overload test
44 Overcurrent protection calibration test
45 Ground-fault circuit-interrupter evaluation test
       for power inverters
46 Battery charger operation test
47 Abnormal operation test
48 Evaluation of reduced spacings on printed wiring
       boards
49 Burnout test
50 Gasket tests
51 Atomized water test
52 Label adhesion test
Manufacturing and production tests
53 Dielectric voltage-withstand test
54 Grounding continuity test
Rating
55 General
Marking
56 Details
57 Content
58 Instruction manual
Part II - Power-converter systems
59 General
Construction
60 Frame and enclosure
61 Power-supply assembly
62 Supply and output connections
63 Overcurrent protection
64 Transfer switches
65 Spacings
Performance
66 Temperature test
Marking
67 Details
Supplement SA - Marine power converters/inverters and
                power converter/inverter systems
Introduction
SA1 Scope
SA2 Glossary
Construction
SA3 General
SA4 Frame and enclosure
SA5 Protection against corrosion
SA6 Supply connections
SA7 Internal wiring
SA8 Battery connections
SA9 Ignition protection
SA10 Receptacles
SA11 Arcing parts
SA12 Electrical components
Performance
SA13 General
SA13A Water spray test
SA13B Drip test
SA14 Leakage current, insulation resistance, and
       dielectric voltage withstand (repeated)
SA15 Salt spray corrosion test
SA16 Output voltage control
SA17 Electrolyte conditioning
SA18 Battery discharge
SA19 Vibration
SA20 Shock
SA21 Ignition protection
SA22 Metallic coating thickness
SA23 Accelerated aging of gaskets, sealing compounds
       and adhesives
SA24 Label adhesion
Marking
SA25 Details
Instructions
SA26 Instruction manual
SA27 Important safety instructions
SA28 Assembly instructions
SA29 Operating instructions
SA30 Maintenance instructions
Appendix
A Standards for components

This revision of ANSI/UL 458 dated January 11, 2021 includes the following changes in requirements: • Revision to polarity color coding; 58.2 • Revision to scope; 1.1, 1.2, 1.4, 1.5, Table 32.1, Table 35.1 and 48.2.5 • Revision to production line test conditions; Table 54.1 • Revision to address charging lithium batteries; 1.3, Section 14A, 58.26 and 59.5

1.1 These requirements cover fixed and stationary power converters, power-converter systems, and accessories having a rated nominal input of 120, 120/240, or 240 V, alternating current and a nominal output of 24 V60 V or less, direct current.