When you need a multimeter for testing electrical equipment around the home, it's vital to know what all those symbols around ...

Learn to recognise different circuit symbols with these interactive learning resources for KS2 Science students aged 7-11 from BBC Bitesize.

Code Calculations The requirements for protecting the branch-circuit conductors, control apparatus, and circuits that supply hermetic refrigerant motor-compressors against short circuits and ground ...

Ground-up receptacles are common in hospitals, where electrical arcs from a short circuit would be particularly disruptive.

Note: This article is based on the 1999 NEC. Since 1971, the NEC has expanded the requirements for ground-fault circuit interrupters (GFCI) to protect anyone who plugs into an electrical system.