Yes, using the first bar for a dedicated line keeps your stereo AC out of phase with the rest of the house and is a good idea. However... you might want to spring for a qualified electrician. If you accidently touch those innocent looking bars you could be dead before you hit the ground.
How to check polarity?
Hi,
I just install a sub-panel for dedicated lines by using D square breaker panel. Some people suggest to use positive phase and first bar of the main panel for dedicated lines. Here are my questions.
1/ I opened the main panel and see all the bars are the same. So, how do I know which bar is positive bar?
2/ How do I know which bar is the first bar?
3/ How do I check the polarity to ensure it correct? What's kind of equipment do I need for polarity check?
Thank you very much.
DT
I just install a sub-panel for dedicated lines by using D square breaker panel. Some people suggest to use positive phase and first bar of the main panel for dedicated lines. Here are my questions.
1/ I opened the main panel and see all the bars are the same. So, how do I know which bar is positive bar?
2/ How do I know which bar is the first bar?
3/ How do I check the polarity to ensure it correct? What's kind of equipment do I need for polarity check?
Thank you very much.
DT