110.14 prohibits the use of conductors of dissimilar metals in the same terminal or connector unless the terminal/connector is identified as for that purpose. As a result, need some advice from the pros.

The SEC on both sides of the meter are the original aluminum. I updated and relocated the main breaker panel board, but installed a service disconnect in the original panel location to stay within five feet of the meter, per local code. I used copper for the feeders (code allowed) and in the interim the service disconnect SEC is the aluminum (either allowed for SEC). I eventually want to use copper from the disconnect to the meter, but then I would have a copper/aluminum combo under the neutral terminal, a violation of 110.14. I know aluminum is used a lot for SEC, I guess I just have a phobia about aluminum. The house was originally wired with aluminum, and I found some real scary stuff when I was rewiring the house. Honestly, I'm surprised the house didn't burn down ages ago.

1. From a practical (and cheaper:eek:) standpoint, should I just stick with the aluminum on the line side of the disconnect?
2. If I had the SEC from the service drop replaced with copper, are special connectors used for copper to aluminum? The service drop is aluminum.
3. I would call my utility for details, but generally, are electricians allowed to replace/connect the SEC to the service drop?
4. Finally, how long has 110.14 been in effect? I'm asking as my system is grounded at the meter, but the electrician connected the copper ground wire under the neutral terminal in the meter case, which uses aluminum SEC. The house was built in 1966.

Well, there should be no place where the line and load neutrals share a terminal. Each should have it's own.

Yes, there are special connections when CU must be connected to AL. Service drop splices have a plate that separates the two conductors.

Some electricians are, some not. Depends on the area.

It is rare to see a grounding electrode conductor (GEC) terminated in a meter pan any more. Typically this connection is made in the main panel or disconnect.

Are you saying the electrician put the GEC right under the same terminal as the service neutral? This is a violation and not smart. There should have been a dedicated terminal just for the GEC.

Stan, yep that's what he did. The meter pan is old (1966) and my thinking was the same as yours, should have a dedicated terminal for the GEC. Maybe I should just have the whole meter pan replaced as the terminals/interior looks pretty worn... I plan on moving the ground to the disconnect.