Small Electrician
Member
- Location
- United States
- Occupation
- Electrical Apprentice
Hey guys. Got 2 sub panels (main and heat) in the cellar fed by a main panel upstream. The main one is fed by 2 awg Al ser cable and holds all the 120v circuits. The other (heat) is fed by 1/0 Al seu and was primarily for 240v baseboard heat which was all removed. Both sub panels are fed by 70 amp breakers.
2 questions: Did they install seu back then for sub panels that are primarily for 240v heat and leave out a neutral making the panel 240v only?
And now the other question, I recently replaced both sub panels since they were very old. The main sub panel has no issue. Grounds and neutrals are separated. Now I added an 8awg bare copper copper ground to the heat panel since I need to be able to also put 120v circuits on this panel. I used the stranded conductor of the seu cable as the neutral and taped it white. Now that I’ve separated the grounds and neutrals in the sub panel, is this against code to use the concentric stranded conductor (marked with green tape in main panel) previously a ground and use it as a neutral? Should I be changing out the seu cable with ser?
2 questions: Did they install seu back then for sub panels that are primarily for 240v heat and leave out a neutral making the panel 240v only?
And now the other question, I recently replaced both sub panels since they were very old. The main sub panel has no issue. Grounds and neutrals are separated. Now I added an 8awg bare copper copper ground to the heat panel since I need to be able to also put 120v circuits on this panel. I used the stranded conductor of the seu cable as the neutral and taped it white. Now that I’ve separated the grounds and neutrals in the sub panel, is this against code to use the concentric stranded conductor (marked with green tape in main panel) previously a ground and use it as a neutral? Should I be changing out the seu cable with ser?
