UL 79-2016 pdf download
UL 79-2016 pdf download.Power-Operated Pumps for Petroleum Dispensing Products.
24.3.5 Insulated or uninsulated aluminum conductors used as internal wiring, such as for internal connection between current-carrying parts or as motor windings, shall be terminated by a method that has been determined to be appropriate for the combination of metals involved at the point of connection.
24.3.6 With reference to the requirements in 24.3.5, a wire-binding screw or a pressure wire connector used as a terminating device shall be rated for use with aluminum under the conditions involved — for example. temperature. heat cycling, vibration, and similar conditions.
24.3.7 Insulation consisting of:
a) Two layers of friction tape:
b) Two layers of thermoplastic tape; or
C) One layer of friction tape on top of one layer of rubber tape
is not prohibited on a splice when the voltage involved is less than 250 volts. In determining when splice insulation consisting of coated-fabric, thermoplastic. or other type of tubing complies with the intent of this requirement, consideration shall be given to such factors as its dielectric properties, heat- and moisture-resistant characteristics, and similar features. Thermoplastic tape is not to be wrapped over a sharp edge.
24.3.8 When stranded internal wire is connected to a wire-binding screw, loose strands of wire shall be positively prevented from contacting an uninsulated live part that is not always of the same polarity as the wire and from contacting a dead metal part. This shall be accomplished:
a) By use of a pressure terminal connector. soldering lug, or crimped eyelet;
b) By soldering all strands of the wire together; or
c) By other means that have been determined to be equivalent.
24.3.9 A nominal 0.110 inch (2.8 mm), 0.125 inch (3.2 mm), 0.187 inch (4.75 mm). 0.205 inch (5.2 mm). or 0.250 inch (6.35 mm) wide quick-connect terminal shall comply with the Standard for Electrical Quick-Connect Terminals. UL 310. Other sizes shall be investigated with respect to:
a) Crimp pullout;
b) Engagement-disengagement forces of the connector and tab: and
C) Temperature rises.
All tests shall be conducted in accordance with UL 310.
25 Separation of Circuits
25.1 Conductors of circuits operating at different potentials shall be reliably separated from each other unless they are each provided with insulation rated for the highest potential involved.
25.2 An insulated conductor shall be reliably retained so that it is not capable of contacting an uninsulated live part of a circuit operating at a different potential.
25.3 In a compartment that is intended for the field installation of conductors and that contains provision for connection of Class 2 or Class 3 circuit conductors and Class 1 (power or lighting) circuit conductors, as defined in the National Electrical Code, NFPA 70. a barrier shall be provided to separate the conductors of the different circuits, or the arrangement of the compartment shall be such that a minimum spacing of 14 inch (6.4 mm) is permanently maintained between the conductors of the different circuits. including the conductors to be field installed
26 Capacitors
26.1 A capacitor provided as a part of a capacitor motor and a capacitor connected across the line, such as a capacitor for radio-interference elimination or power-factor correction. shall be housed within an enclosure or container that protects the plates against mechanical damage and that prevents the emission of flame or molten material resulting from malfunction or breakdown of the capacitor. The container shall be of metal providing strength and protection not less than that of 0.020 inch (0.51 mm) thick uncoated steel. Sheet metal having a thickness less than 0.026 inch (0.66 mm) shall not be used.
Exception: The individual container of a capacitor that is made of sheet metal less than 0.020 inch thick or of material other than metal is not prohibited from being used when the capacitor is mounted in an enclosure that houses other parts of the product and when such housing is evaluated for the enclosure of live parts.
26.2 When a capacitor that is not a part of a capacitor motor or a capacitor-start motor is connected in a product that is intended to be automatically or remotely controlled so that malfunction or breakdown of the capacitor is capable of resulting in a risk of fire. electric shock, or injury to persons. thermal or overcurrent protection shall be provided in the product to reduce the possibility of such a condition occurring.
