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What is CU7AL?
What does CU7AL and CU9AL mean? The CU and AL refer to the connector being “dual rated”for both aluminum and copper wire and the 7 or 9 refer to the heat rating of the wire insulation. A “7”= 75C and a “9”= 90C.
What is CU AL wire?
In the late 1960s, a device specification known as CU/AL (meaning copper-aluminum) was created that specified standards for devices intended for use with aluminum wire.
What is a dual rated lug?
84JM. Dual Rated Wire Connectors, Lugs. Dual Rated connectors and lugs are so called because they are designed to handle both copper and aluminum wire in the same connector. Without having to change to a different connector, Dual Rated connectors and lugs enable the choice to be made at any time.
What is termination temperature?
If a termination is rated for 75°C, the maximum temperature at that termination is 75°C when the equipment is loaded to its ampacity. For equipment with termination provisions for circuits rated 100A or less or marked for No.
Does a house built in 1980 need wiring?
A house wired in 1980s, which has had no alterations may not need rewiring for another 20 years. Houses built after the 1970’s do not have aluminum wiring at their branch lighting circuits (for receptacles and switches). Some houses built in the early 1980’s have electrical panels that are no longer considered safe.
What does 60 75 mean on a circuit breaker?
60/75°C Wire — All circuit breakers rated 125 A or less are marked for use with 60° C, 60/75°C or 75°C only wire. This marking indicates the proper wire size for termination in accordance with Table 310.15(B)(16) of the NEC .
What four things determine an object’s resistance?
There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of the wire, and nature of the material.
Is it hard to sell a house with aluminum wiring?
Is aluminum wiring illegal? Aluminum wiring is not illegal, but it is no longer up to code and new homes are now built with copper wiring. If you are thinking about buying or selling a home with aluminum wiring, you will be ok as long as you follow the instructions on how to deal with it.