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Short circuit current rating (SCCR) is the maximum fault (short circuit) current that a piece of electrical equipment can safely withstand for a specified time…
Selective coordination in commercial electrical design is arranging the overcurrent protective devices (breakers and fuses) so that, when a fault occurs, only the device closest…
An arc flash boundary is the distance from energized electrical equipment within which a person could receive a dangerous level of heat energy, enough to…
A ground fault protection system for a service is protective equipment that detects ground faults, unintended current flowing to ground, on larger electrical services and…
Transient voltage surge suppression (TVSS) is protection that guards an electrical system and its connected equipment from transients, brief, high-voltage spikes that can damage electronics…
A neutral current overload in commercial wiring is often caused by harmonic currents from nonlinear electronic loads adding together in a shared neutral, and by…
Voltage imbalance (or unbalance) in a three-phase system is when the voltages of the three phases are not equal to each other, which can cause…
A commercial building can have power at every outlet and still experience flickering lights, overheated equipment, nuisance breaker trips, or unexplained electronics failures. Understanding what…
A transformer room may be out of sight, but it has a direct effect on whether a commercial building has safe, dependable power. So, what…
A new panel, a workshop machine, or an EV-related upgrade can bring unfamiliar electrical terms into the conversation. When homeowners ask, “what is a delta…
