ECN Forum Forums General Topics of the Trade Non-US Electrical Systems & Trades Why is it always 555 ?

For our non-U.S. members who watch American TV shows, have you wondered why just about everywhere seems to have a number that starts 555?

I've posted a brief explanation in the general area that might satisfy your curiosity!
https://www.electrical-contractor.net/ubb/Forum1/HTML/002756.html