The lights went hay wire, dim, bright, dim, bright, funny noises.. then the power went out for a while. Brown out and then black out which to me it means lost neutral from utility. Now, this is what I don't understand, three of the 240V loads were damaged (well pump and controller) and the A/C compressor was making funny noises and it would run erratically until the breaker was shut off. Most of the 120V loads were OK, even the electronic dimmers. Only 120V damage was to motorized shades.
If it was a lost neutral, why would the 240V appliances get damaged. The property does have a SPD on the main service and it is OK indicating the issue was a lost neutral. If it was a surge, then why did the SPD survive?
Thank you for your input.
If it was a lost neutral, why would the 240V appliances get damaged. The property does have a SPD on the main service and it is OK indicating the issue was a lost neutral. If it was a surge, then why did the SPD survive?
Thank you for your input.