https://freearticlesmania.com/....2-of-the-most-common

2 of the Most Common 600 Volt Wire Insulations, Explained
Favicon 
freearticlesmania.com

2 of the Most Common 600 Volt Wire Insulations, Explained

One of the most common voltage ratings for general purpose building wire is 600 volts since most electrical service in this country is at or below 240 volts, with 120 volts probably being the most common.