The company will use helicopters to identify potential transmission lines problems in the high-voltage lines.
The inspections will focus on possible wear on power line conductors and lightning protection devices; damaged or leaning transmission structures; loose or broken guy wires; broken, chipped or cracked insulator equipment, among others.
National Grid project management and complex construction vice-president David Way said: "Proper and regular inspections of our transmission system is a critical component in providing safe and reliable electric power to our more than 1.7 million electricity customers across New England.
"Transmission lines can be damaged during the winter months by severe weather, making now an ideal time to have an up-close look and make sure customers have the reliable service they deserve and expect."
The aerial inspections complement the regularly-conducted ground-level inspections of the transmissions lines, which carry electricity at or greater than 69,000 volts.
The company expects the inspections to be completed in approximately five weeks.
