If a lighting ballast fails, do you change it out hot? That's a fairly common practice, but you can get electrocuted by 277V just as surely as from a higher voltage. If you're on a ladder, the fall ...

In September 2000, the U.S. Department of Energy (DOE) amended the existing conservation standards for fluorescent lamp ballasts when it published standard 10 CFR Part 430, Energy Conservation Program ...

SMRT Trains has began renewal works on its railway tracks on certain parts that have worn out ballast, gravel or coarse stone. These rocks cushion train vibration and support smooth and reliable ...

Operations to replace track ballast on the line between Norwich and London may have caused a bridge in Essex to crack. Network Rail (NR) said it was investigating if procedures were followed during ...