UL 710:2019 pdf download.Standard for Exhaust Hoods for Commercial Cooking Equipment.
18.1.5 The internal winng of an exhaust hood shall not be routed in or through the exhaust plenum (area of hood behind the filters or grease removal devices).
18.1.6 Wiring shall have insulation rated for the potential involved and the temperatures to which it is subjected. The temperature rating of the fixture winng shall be at least that marked on the fixture.
18.1.7 Wiflng shall be protected against mechanical damage. shall be supported and routed to reduce damage due to contact with a sharp edge. moving part, or hot part, and shall not be immersed in water
18.2 Wiring methods
18.2.1 A splice or connection shall be mechanically secure and bonded electncally. A soldered connection shall be made mechanically secure before being soldered when tweaking or loosening of the connection results in risk of fire or electric shock.
18.2.2 A splice shall be provided with insulation equivalent to that of the wires involved when the spacing between the splice and other metal parts is not permanent.
18.2.3 A splice shall be located, enclosed, and supported so that it is not subjecl to mechanical damage, flexing. motion, vibration due to air movement, or similar conditions.
19 Separation of Circuits
19.1 Unless provided with insulation rated for the highest voltage involved, insulated conductors of different internal wiring circuits. including wires in a junction box or compartment other than subdivided circuits or branch circuits of the same voltage and from the same feeder, shall be separated by barners or shall be segregated. and shall also be separated or segregated from uninsulated live parts connected to a different circuit.
19.2 Segregation of insulated conductors shall be accomplished by clamping, routing, or an equivalent means that provides permanent separation.
19.3 The output of a transformer device supplying a low-voltage orcuit as specified in j3 shall not be interconnected with the output of another such transformer device provided as a part of the product unless the voltage and current measurements at the output terminals of the interconnected devices are within the values for a single low-voltage transformer device.
18.1.6 Wiring shall have insulation rated for the potential involved and the temperatures to which it is subjected. The temperature rating of the fixture winng shall be at least that marked on the fixture.
18.1.7 Wiflng shall be protected against mechanical damage. shall be supported and routed to reduce damage due to contact with a sharp edge. moving part, or hot part, and shall not be immersed in water
18.2 Wiring methods
18.2.1 A splice or connection shall be mechanically secure and bonded electncally. A soldered connection shall be made mechanically secure before being soldered when tweaking or loosening of the connection results in risk of fire or electric shock.
18.2.2 A splice shall be provided with insulation equivalent to that of the wires involved when the spacing between the splice and other metal parts is not permanent.
18.2.3 A splice shall be located, enclosed, and supported so that it is not subjecl to mechanical damage, flexing. motion, vibration due to air movement, or similar conditions.
19 Separation of Circuits
19.1 Unless provided with insulation rated for the highest voltage involved, insulated conductors of different internal wiring circuits. including wires in a junction box or compartment other than subdivided circuits or branch circuits of the same voltage and from the same feeder, shall be separated by barners or shall be segregated. and shall also be separated or segregated from uninsulated live parts connected to a different circuit.
19.2 Segregation of insulated conductors shall be accomplished by clamping, routing, or an equivalent means that provides permanent separation.
19.3 The output of a transformer device supplying a low-voltage orcuit as specified in j3 shall not be interconnected with the output of another such transformer device provided as a part of the product unless the voltage and current measurements at the output terminals of the interconnected devices are within the values for a single low-voltage transformer device.
