UL COPYRIGHTED MATERIAL –
NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
DISTRIBUTION WITHOUT PERMISSION FROM UL
12.1.13 Unenclosed individual leads intended for connection external to the converter shall employ
insulated copper conductors. A positive lead shall extend outside the converter not more than 18 inches
(457 mm). The insulation may be 0.030-inch (0.76-mm) thick thermoplastic or the equivalent.
12.1.14 Unenclosed individual leads intended for connection external to the converter shall comply with
the requirements in Section 42, Strain Relief Test.
12.1.15 The conductors of unenclosed individual leads for output connections shall be protected by
overcurrent devices unless the ampacity of the conductors of such leads is not less than the output rating
of the circuit. Ampacities are to be based on the values for low-voltage circuits.
12.1.16 Each secondary-output branch circuit shall be marked in accordance with 57.5 to indicate the
corresponding branch-circuit protection provided for each secondary-output connection.
12.2 Cigarette lighter inputs
12.2.1 An inverter intended to be connected to the cigarette lighter outlet of a vehicle, while delivering its
normal output load, shall not exceed 8 amperes at the cigarette lighter outlet.
12.2.1 revised October 15, 2004
13 Secondary Circuits
Section 13 effective April 13, 1993
13.1 A metal enclosure of a converter or inverter shall not be used as a current-carrying part of an output
circuit. Secondary circuits may be connected to the frame of a converter or an inverter; however, the frame
shall not be used to carry current during intended operation.
13.2 All secondary circuits other than as specified in 13.3 – 13.11, are to be investigated as primary
circuits. In addition, all safety circuits shall be investigated using the requirements for primary circuits.
13.3 Except as noted in 28.1.13, printed-wiring assemblies and associated circuitry used in low-voltage,
limited energy circuits need not be investigated. However, components such as wire connectors, bus bars,
printed-wiring receptacles, connectors and the like, motors, printed wiring boards, and insulated wire used
in such circuits shall be investigated.
13.4 A circuit supplied from a Class 2 transformer need not be investigated. However, printed-wiring
boards and insulated wire used in such circuits shall be investigated with respect to the temperature and
voltage, exposure to oil or grease, and other conditions of service to which the wiring and printed-wiring
boards can be subjected.
13.5 Except as noted in 28.1.13 and 28.1.14, a circuit that does not extend out of the converter or inverter
need not be investigated if the open-circuit potential or no-load output of the supply is:
a) Not more than 42.4 volts peak ac or 60 volts dc; and
b) The energy available at 1 min of operation is limited to:
1) 8 amperes for 0-42.4 volts peak ac or 0-30 volts dc; or
OCTOBER 15, 2004UL 45826
To Next Page
Loading...