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NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
DISTRIBUTION WITHOUT PERMISSION FROM UL
SA3.3 With reference to SA3.2, a meter may be located in an area remote from the marine converter
provided:
a) The meter shunt is located within the marine converter enclosure.
b) Overcurrent protection for external meter leads is provided within the marine converter or
inverter enclosure.
SA4 Frame and Enclosure
Section SA4 effective April 13, 1993
SA4.1 General
SA4.1.1 A marine converter or inverter intended to be mounted on a bulkhead or other vertical surface
shall be provided with mounting holes of the same nominal size as the mounting screws.
SA4.1.2 Keyhole slots shall not be used for mounting a marine converter or inverter.
Exception: Keyhole slots for mounting may be provided if there are at least two round holes sized to
accommodate permanent mounting screws or the keyhole slots are arranged so that complete removal of
at least two mounting screws is needed in order to remove the unit.
SA4.1.2 revised January 27, 1995
SA4.1.3 The enclosure of a marine converter or inverter intended to be installed in an open cockpit or on
a weatherdeck shall comply with the requirements in Sections SA4, General, Section SA5, Protection
Against Corrosion, Section SA14, Leakage Current, Insulation Resistance, and Dielectric Voltage
Withstand (Repeated) and Section SA15, Salt Spray Corrosion Test.
SA4.2 Enclosures for open cockpit or weatherdeck mounting
SA4.2.1 The enclosure of a marine converter or inverter for open cockpit or weatherdeck mounting shall
be constructed so as to exclude a beating rain.
SA4.2.2 The requirements in SA4.2.3 – SA4.2.6 apply to marine converters or inverters that are intended
for permanent open cockpit or weatherdeck mounting installation.
SA4.2.3 When subjected to the rain test described in Section SA15, Salt-Spray Corrosion Test, an
enclosure shall prevent rain from entering the enclosure.
SA4.2.4 A gasket employed in a marine converter or inverter for open cockpit or weatherdeck mounting
shall be tested as specified in Section SA23, Accelerated Aging of Gaskets, Sealing Compounds and
Adhesives.
SA4.2.5 A marine converter or inverter for open cockpit or weatherdeck mounting shall be provided with
external means for mounting.
Exception: An enclosure may be provided with internal means for mounting if the mounting means is
designed so as to prevent water from entering the enclosure.
SA4.2.6 All openings for conduit other than in the bottom shall be threaded.
JANUARY 27, 1995UL 458SA2
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