What does AL9CU mean?
Dual Rated connectors may be identified with the markings: CU7AL (AL7CU) and CU9AL (AL9CU). The CU and AL signify that either copper or aluminum wire may be used and the 7 or 9 signifies the temperature rating of the wire that may be used with the connector or lug. 7 = 75C and 9 = 90C.
What does CU9AL mean?
90C rated
A. The common typical mark is “CU7AL” or “AL7CU” meaning that copper or aluminum wire may be used at capacity based on a likely highest working temperature of 75C. CU9AL means 90C rated.
What is Dual Rated?
A dual rated cable is a cable that lists two different voltage ratings on its jacket. For instance, a cable with 115 mils insulation thickness may have a jacket with a print legend that lists both 5kV and 8kV voltages at 133% and 100% insulation levels respectively on it.
What are compression lugs used for?
Get High Grade Compression Cable Lugs today. Compression Cable lugs are devices used for connecting cables to electrical appliances, other cables, surfaces, or mechanisms.
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. Some of these devices used larger undercut screw terminals to more securely hold the wire.
What is cual wire?
Dual-rated connectors can be used either on aluminum (AL) or copper (CU) wire. CUAL or ALCU means “dual-rated”. . During installation, the metals are compressed together and the aluminum surfaces are reformed; the oxide-inhibitor prevents subsequent surface-oxide formation.
What is UL voltage rating?
UL 1277, the standard for electrical power and control tray cable, was recently updated, allowing manufacturers with UL approved tray cable to market their product as 600V/1kV rated. To be dual rated, products must use a recognized 1kV rated conductor and pass a higher voltage AC Hipot test on the completed cable.
What is Al Cu receptacle?
Usually, receptacles approved for aluminum wiring will get stamped CO/ALR, CU-AL, or AL-CU, indicating they may get used for both copper and aluminum. Do not use outlets marked with AL and a line through it. These receptacles are not compatible with aluminum wiring.
What does CU-Al breaker mean?
Posts: 11,252. Images: 9. The Cu-Al designation means the breaker can be used with either copper or aluminum wire. The issue with aluminum wiring is the potential for heat build up in connections due to increased resistance caused by oxidation.
