Hello there! I am currently going through the Res. Electric Inspection module and have a question about Aluminum wiring. There is a section that has a diagram of all the wire gages, and two of the Aluminum wires (both of which are for 40 or 50 amp currents respectively) have this sequence on it…
4/4/4/6 AL SER
I have tried to research what it means, but have come up empty thus far. Thoughts?
As shown in David’s graphic the numbers represent the conductor size and the number of conductors. SER refers to service entrance cable with more than 3 conductors. (SEU would typically have 3 conductors). Some may have colored conductors or all black conductors with a colored tracer (Red, White) along the side to indicate which conductor it is, or bare for the EGC.
4/4/4/6 Al SER would breakdown like this:
Conductor 1-#4 AWG aluminum ungrounded conductor, black insulation
Conductor 2-#4 AWG aluminum ungrounded conductor, black insulation, red tracer
Conductor 3-#4 AWG aluminum neutral conductor, black insulation, white tracer
Conductor 4-#6 AWG aluminum equipment grounding conductor, bare