Table
CU/AL Termination Markings and Compatibility
CU/AL Termination Markings and Compatibility reference with assumptions and boundary notes.
Reference boundary
Terminal marking reference only. The actual equipment label, conductor material, torque value, and manufacturer instructions govern terminations.
Reference table
Decode common copper and aluminum terminal marking labels used on equipment and devices.
| Marking | Meaning | Temp rating (C) | Boundary |
|---|---|---|---|
| CU | Copper conductor terminal only | 75 | Terminal marking reference only; equipment label and instructions govern conductor use |
| AL | Aluminum conductor terminal only | 75 | Terminal marking reference only; equipment label and instructions govern conductor use |
| CU/AL | Copper or aluminum conductor terminal marking | 75 | Terminal marking reference only; torque and conductor range still come from product data |
| AL7CU | Aluminum/copper terminal with 75 C reference | 75 | Terminal marking reference only; use the actual equipment label |
| AL9CU | Aluminum/copper terminal with 90 C reference | 90 | Terminal marking reference only; use the actual equipment label |
Use notes
- Use this table for preliminary reference and arithmetic checks only.
- Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.